VB语言中有关计算器的菜单如何做
菜单编辑器，
这个源码可以借鉴，如果你下不了，我可以帮忙下载，希望能采纳
https://download.csdn.net/download/yuxing1234/842988?utm_source=iteye_new
望采纳，给你源码，做好的vb计算机
<span class="hljs-variable">Public</span> <span class="hljs-variable">Class</span> <span class="hljs-variable">Calculator</span>
<span class="hljs-variable">Dim</span> <span class="hljs-variable">a</span><span class="hljs-operator">,</span> <span class="hljs-variable">b</span> <span class="hljs-variable">As</span> <span class="hljs-variable">Double</span>
<span class="hljs-variable">Dim</span> <span class="hljs-variable">strCalKind</span> <span class="hljs-variable">As</span> <span class="hljs-built_in">String</span>
<span class="hljs-variable">Private</span> <span class="hljs-variable">Sub</span> <span class="hljs-type">Button1_Click</span><span class="hljs-punctuation">(</span><span class="hljs-variable">ByVal</span> <span class="hljs-variable">sender</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">Object</span><span class="hljs-operator">,</span> <span class="hljs-variable">ByVal</span> <span class="hljs-variable">e</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">EventArgs</span><span class="hljs-punctuation">)</span> <span class="hljs-variable">Handles</span> <span class="hljs-variable">Button1</span><span class="hljs-operator">.</span><span class="hljs-variable">Click</span>
<span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span> <span class="hljs-operator">+=</span> <span class="hljs-variable">Button1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span>
<span class="hljs-built_in">End</span> <span class="hljs-variable">Sub</span>
<span class="hljs-variable">Private</span> <span class="hljs-variable">Sub</span> <span class="hljs-type">Button2_Click</span><span class="hljs-punctuation">(</span><span class="hljs-variable">ByVal</span> <span class="hljs-variable">sender</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">Object</span><span class="hljs-operator">,</span> <span class="hljs-variable">ByVal</span> <span class="hljs-variable">e</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">EventArgs</span><span class="hljs-punctuation">)</span> <span class="hljs-variable">Handles</span> <span class="hljs-variable">Button2</span><span class="hljs-operator">.</span><span class="hljs-variable">Click</span>
<span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span> <span class="hljs-operator">+=</span> <span class="hljs-variable">Button2</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span>
<span class="hljs-built_in">End</span> <span class="hljs-variable">Sub</span>
<span class="hljs-variable">Private</span> <span class="hljs-variable">Sub</span> <span class="hljs-type">Button3_Click</span><span class="hljs-punctuation">(</span><span class="hljs-variable">ByVal</span> <span class="hljs-variable">sender</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">Object</span><span class="hljs-operator">,</span> <span class="hljs-variable">ByVal</span> <span class="hljs-variable">e</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">EventArgs</span><span class="hljs-punctuation">)</span> <span class="hljs-variable">Handles</span> <span class="hljs-variable">Button3</span><span class="hljs-operator">.</span><span class="hljs-variable">Click</span>
<span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span> <span class="hljs-operator">+=</span> <span class="hljs-variable">Button3</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span>
<span class="hljs-built_in">End</span> <span class="hljs-variable">Sub</span>
<span class="hljs-variable">Private</span> <span class="hljs-variable">Sub</span> <span class="hljs-type">Button4_Click</span><span class="hljs-punctuation">(</span><span class="hljs-variable">ByVal</span> <span class="hljs-variable">sender</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">Object</span><span class="hljs-operator">,</span> <span class="hljs-variable">ByVal</span> <span class="hljs-variable">e</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">EventArgs</span><span class="hljs-punctuation">)</span> <span class="hljs-variable">Handles</span> <span class="hljs-variable">Button4</span><span class="hljs-operator">.</span><span class="hljs-variable">Click</span>
<span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span> <span class="hljs-operator">+=</span> <span class="hljs-variable">Button4</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span>
<span class="hljs-built_in">End</span> <span class="hljs-variable">Sub</span>
<span class="hljs-variable">Private</span> <span class="hljs-variable">Sub</span> <span class="hljs-type">Button5_Click</span><span class="hljs-punctuation">(</span><span class="hljs-variable">ByVal</span> <span class="hljs-variable">sender</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">Object</span><span class="hljs-operator">,</span> <span class="hljs-variable">ByVal</span> <span class="hljs-variable">e</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">EventArgs</span><span class="hljs-punctuation">)</span> <span class="hljs-variable">Handles</span> <span class="hljs-variable">Button5</span><span class="hljs-operator">.</span><span class="hljs-variable">Click</span>
<span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span> <span class="hljs-operator">+=</span> <span class="hljs-variable">Button5</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span>
<span class="hljs-built_in">End</span> <span class="hljs-variable">Sub</span>
<span class="hljs-variable">Private</span> <span class="hljs-variable">Sub</span> <span class="hljs-type">Button6_Click</span><span class="hljs-punctuation">(</span><span class="hljs-variable">ByVal</span> <span class="hljs-variable">sender</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">Object</span><span class="hljs-operator">,</span> <span class="hljs-variable">ByVal</span> <span class="hljs-variable">e</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">EventArgs</span><span class="hljs-punctuation">)</span> <span class="hljs-variable">Handles</span> <span class="hljs-variable">Button6</span><span class="hljs-operator">.</span><span class="hljs-variable">Click</span>
<span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span> <span class="hljs-operator">+=</span> <span class="hljs-variable">Button6</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span>
<span class="hljs-built_in">End</span> <span class="hljs-variable">Sub</span>
<span class="hljs-variable">Private</span> <span class="hljs-variable">Sub</span> <span class="hljs-type">Button7_Click</span><span class="hljs-punctuation">(</span><span class="hljs-variable">ByVal</span> <span class="hljs-variable">sender</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">Object</span><span class="hljs-operator">,</span> <span class="hljs-variable">ByVal</span> <span class="hljs-variable">e</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">EventArgs</span><span class="hljs-punctuation">)</span> <span class="hljs-variable">Handles</span> <span class="hljs-variable">Button7</span><span class="hljs-operator">.</span><span class="hljs-variable">Click</span>
<span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span> <span class="hljs-operator">+=</span> <span class="hljs-variable">Button7</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span>
<span class="hljs-built_in">End</span> <span class="hljs-variable">Sub</span>
<span class="hljs-variable">Private</span> <span class="hljs-variable">Sub</span> <span class="hljs-type">Button8_Click</span><span class="hljs-punctuation">(</span><span class="hljs-variable">ByVal</span> <span class="hljs-variable">sender</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">Object</span><span class="hljs-operator">,</span> <span class="hljs-variable">ByVal</span> <span class="hljs-variable">e</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">EventArgs</span><span class="hljs-punctuation">)</span> <span class="hljs-variable">Handles</span> <span class="hljs-variable">Button8</span><span class="hljs-operator">.</span><span class="hljs-variable">Click</span>
<span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span> <span class="hljs-operator">+=</span> <span class="hljs-variable">Button8</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span>
<span class="hljs-built_in">End</span> <span class="hljs-variable">Sub</span>
<span class="hljs-variable">Private</span> <span class="hljs-variable">Sub</span> <span class="hljs-type">Button9_Click</span><span class="hljs-punctuation">(</span><span class="hljs-variable">ByVal</span> <span class="hljs-variable">sender</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">Object</span><span class="hljs-operator">,</span> <span class="hljs-variable">ByVal</span> <span class="hljs-variable">e</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">EventArgs</span><span class="hljs-punctuation">)</span> <span class="hljs-variable">Handles</span> <span class="hljs-variable">Button9</span><span class="hljs-operator">.</span><span class="hljs-variable">Click</span>
<span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span> <span class="hljs-operator">+=</span> <span class="hljs-variable">Button9</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span>
<span class="hljs-built_in">End</span> <span class="hljs-variable">Sub</span>
<span class="hljs-variable">Private</span> <span class="hljs-variable">Sub</span> <span class="hljs-type">Button10_Click</span><span class="hljs-punctuation">(</span><span class="hljs-variable">ByVal</span> <span class="hljs-variable">sender</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">Object</span><span class="hljs-operator">,</span> <span class="hljs-variable">ByVal</span> <span class="hljs-variable">e</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">EventArgs</span><span class="hljs-punctuation">)</span> <span class="hljs-variable">Handles</span> <span class="hljs-variable">Button10</span><span class="hljs-operator">.</span><span class="hljs-variable">Click</span>
<span class="hljs-built_in">If</span> <span class="hljs-built_in">Not</span> <span class="hljs-punctuation">(</span><span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span> <span class="hljs-operator">=</span> <span class="hljs-string">"0"</span><span class="hljs-punctuation">)</span> <span class="hljs-variable">Then</span>
<span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span> <span class="hljs-operator">+=</span> <span class="hljs-variable">Button10</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span>
<span class="hljs-built_in">End</span> <span class="hljs-built_in">If</span>
<span class="hljs-built_in">End</span> <span class="hljs-variable">Sub</span>
<span class="hljs-variable">Private</span> <span class="hljs-variable">Sub</span> <span class="hljs-type">Button17_Click</span><span class="hljs-punctuation">(</span><span class="hljs-variable">ByVal</span> <span class="hljs-variable">sender</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">Object</span><span class="hljs-operator">,</span> <span class="hljs-variable">ByVal</span> <span class="hljs-variable">e</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">EventArgs</span><span class="hljs-punctuation">)</span> <span class="hljs-variable">Handles</span> <span class="hljs-variable">Button17</span><span class="hljs-operator">.</span><span class="hljs-variable">Click</span>
<span class="hljs-built_in">If</span> <span class="hljs-built_in">Not</span> <span class="hljs-punctuation">(</span><span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span><span class="hljs-operator">.</span><span class="hljs-variable">Contains</span><span class="hljs-punctuation">(</span><span class="hljs-string">"."</span><span class="hljs-punctuation">)</span><span class="hljs-punctuation">)</span> <span class="hljs-variable">Then</span>
<span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span> <span class="hljs-operator">+=</span> <span class="hljs-variable">Button17</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span>
<span class="hljs-built_in">End</span> <span class="hljs-built_in">If</span>
<span class="hljs-built_in">End</span> <span class="hljs-variable">Sub</span>
<span class="hljs-variable">Private</span> <span class="hljs-variable">Sub</span> <span class="hljs-type">Button12_Click</span><span class="hljs-punctuation">(</span><span class="hljs-variable">ByVal</span> <span class="hljs-variable">sender</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">Object</span><span class="hljs-operator">,</span> <span class="hljs-variable">ByVal</span> <span class="hljs-variable">e</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">EventArgs</span><span class="hljs-punctuation">)</span> <span class="hljs-variable">Handles</span> <span class="hljs-variable">Button12</span><span class="hljs-operator">.</span><span class="hljs-variable">Click</span>
<span class="hljs-variable">a</span> <span class="hljs-operator">=</span> <span class="hljs-variable">Convert</span><span class="hljs-operator">.</span><span class="hljs-variable">ToDouble</span><span class="hljs-punctuation">(</span><span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span><span class="hljs-punctuation">)</span>
<span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span> <span class="hljs-operator">=</span> <span class="hljs-string">""</span>
<span class="hljs-variable">strCalKind</span> <span class="hljs-operator">=</span> <span class="hljs-string">"+"</span>
<span class="hljs-built_in">End</span> <span class="hljs-variable">Sub</span>
<span class="hljs-variable">Private</span> <span class="hljs-variable">Sub</span> <span class="hljs-type">Button13_Click</span><span class="hljs-punctuation">(</span><span class="hljs-variable">ByVal</span> <span class="hljs-variable">sender</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">Object</span><span class="hljs-operator">,</span> <span class="hljs-variable">ByVal</span> <span class="hljs-variable">e</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">EventArgs</span><span class="hljs-punctuation">)</span> <span class="hljs-variable">Handles</span> <span class="hljs-variable">Button13</span><span class="hljs-operator">.</span><span class="hljs-variable">Click</span>
<span class="hljs-variable">a</span> <span class="hljs-operator">=</span> <span class="hljs-variable">Convert</span><span class="hljs-operator">.</span><span class="hljs-variable">ToDouble</span><span class="hljs-punctuation">(</span><span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span><span class="hljs-punctuation">)</span>
<span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span> <span class="hljs-operator">=</span> <span class="hljs-string">""</span>
<span class="hljs-variable">strCalKind</span> <span class="hljs-operator">=</span> <span class="hljs-string">"-"</span>
<span class="hljs-built_in">End</span> <span class="hljs-variable">Sub</span>
<span class="hljs-variable">Private</span> <span class="hljs-variable">Sub</span> <span class="hljs-type">Button14_Click</span><span class="hljs-punctuation">(</span><span class="hljs-variable">ByVal</span> <span class="hljs-variable">sender</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">Object</span><span class="hljs-operator">,</span> <span class="hljs-variable">ByVal</span> <span class="hljs-variable">e</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">EventArgs</span><span class="hljs-punctuation">)</span> <span class="hljs-variable">Handles</span> <span class="hljs-variable">Button14</span><span class="hljs-operator">.</span><span class="hljs-variable">Click</span>
<span class="hljs-variable">a</span> <span class="hljs-operator">=</span> <span class="hljs-variable">Convert</span><span class="hljs-operator">.</span><span class="hljs-variable">ToDouble</span><span class="hljs-punctuation">(</span><span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span><span class="hljs-punctuation">)</span>
<span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span> <span class="hljs-operator">=</span> <span class="hljs-string">""</span>
<span class="hljs-variable">strCalKind</span> <span class="hljs-operator">=</span> <span class="hljs-string">"*"</span>
<span class="hljs-built_in">End</span> <span class="hljs-variable">Sub</span>
<span class="hljs-variable">Private</span> <span class="hljs-variable">Sub</span> <span class="hljs-type">Button15_Click</span><span class="hljs-punctuation">(</span><span class="hljs-variable">ByVal</span> <span class="hljs-variable">sender</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">Object</span><span class="hljs-operator">,</span> <span class="hljs-variable">ByVal</span> <span class="hljs-variable">e</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">EventArgs</span><span class="hljs-punctuation">)</span> <span class="hljs-variable">Handles</span> <span class="hljs-variable">Button15</span><span class="hljs-operator">.</span><span class="hljs-variable">Click</span>
<span class="hljs-variable">a</span> <span class="hljs-operator">=</span> <span class="hljs-variable">Convert</span><span class="hljs-operator">.</span><span class="hljs-variable">ToDouble</span><span class="hljs-punctuation">(</span><span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span><span class="hljs-punctuation">)</span>
<span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span> <span class="hljs-operator">=</span> <span class="hljs-string">""</span>
<span class="hljs-variable">strCalKind</span> <span class="hljs-operator">=</span> <span class="hljs-string">"/"</span>
<span class="hljs-built_in">End</span> <span class="hljs-variable">Sub</span>
<span class="hljs-variable">Private</span> <span class="hljs-variable">Sub</span> <span class="hljs-type">Button16_Click</span><span class="hljs-punctuation">(</span><span class="hljs-variable">ByVal</span> <span class="hljs-variable">sender</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">Object</span><span class="hljs-operator">,</span> <span class="hljs-variable">ByVal</span> <span class="hljs-variable">e</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">EventArgs</span><span class="hljs-punctuation">)</span> <span class="hljs-variable">Handles</span> <span class="hljs-variable">Button16</span><span class="hljs-operator">.</span><span class="hljs-variable">Click</span>
<span class="hljs-variable">b</span> <span class="hljs-operator">=</span> <span class="hljs-variable">Convert</span><span class="hljs-operator">.</span><span class="hljs-variable">ToDouble</span><span class="hljs-punctuation">(</span><span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span><span class="hljs-punctuation">)</span>
<span class="hljs-variable">Try</span>
<span class="hljs-built_in">If</span> <span class="hljs-punctuation">(</span><span class="hljs-variable">strCalKind</span> <span class="hljs-operator">=</span> <span class="hljs-string">"+"</span><span class="hljs-punctuation">)</span> <span class="hljs-variable">Then</span>
<span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span> <span class="hljs-operator">=</span> <span class="hljs-punctuation">(</span><span class="hljs-variable">a</span> <span class="hljs-operator">+</span> <span class="hljs-variable">b</span><span class="hljs-punctuation">)</span><span class="hljs-operator">.</span><span class="hljs-built_in">ToString</span><span class="hljs-punctuation">(</span><span class="hljs-punctuation">)</span>
<span class="hljs-variable">ElseIf</span> <span class="hljs-punctuation">(</span><span class="hljs-variable">strCalKind</span> <span class="hljs-operator">=</span> <span class="hljs-string">"-"</span><span class="hljs-punctuation">)</span> <span class="hljs-variable">Then</span>
<span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span> <span class="hljs-operator">=</span> <span class="hljs-punctuation">(</span><span class="hljs-variable">a</span> <span class="hljs-operator">-</span> <span class="hljs-variable">b</span><span class="hljs-punctuation">)</span><span class="hljs-operator">.</span><span class="hljs-built_in">ToString</span><span class="hljs-punctuation">(</span><span class="hljs-punctuation">)</span>
<span class="hljs-variable">ElseIf</span> <span class="hljs-punctuation">(</span><span class="hljs-variable">strCalKind</span> <span class="hljs-operator">=</span> <span class="hljs-string">"*"</span><span class="hljs-punctuation">)</span> <span class="hljs-variable">Then</span>
<span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span> <span class="hljs-operator">=</span> <span class="hljs-punctuation">(</span><span class="hljs-variable">a</span> <span class="hljs-operator">*</span> <span class="hljs-variable">b</span><span class="hljs-punctuation">)</span><span class="hljs-operator">.</span><span class="hljs-built_in">ToString</span><span class="hljs-punctuation">(</span><span class="hljs-punctuation">)</span>
<span class="hljs-variable">ElseIf</span> <span class="hljs-punctuation">(</span><span class="hljs-variable">strCalKind</span> <span class="hljs-operator">=</span> <span class="hljs-string">"/"</span><span class="hljs-punctuation">)</span> <span class="hljs-variable">Then</span>
<span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span> <span class="hljs-operator">=</span> <span class="hljs-punctuation">(</span><span class="hljs-variable">a</span> <span class="hljs-operator">/</span> <span class="hljs-variable">b</span><span class="hljs-punctuation">)</span><span class="hljs-operator">.</span><span class="hljs-built_in">ToString</span><span class="hljs-punctuation">(</span><span class="hljs-punctuation">)</span>
<span class="hljs-built_in">End</span> <span class="hljs-built_in">If</span>
<span class="hljs-built_in">Catch</span> <span class="hljs-variable">ex</span> <span class="hljs-variable">As</span> <span class="hljs-variable">Exception</span>
<span class="hljs-variable">MessageBox</span><span class="hljs-operator">.</span><span class="hljs-built_in">Show</span><span class="hljs-punctuation">(</span><span class="hljs-variable">ex</span><span class="hljs-operator">.</span><span class="hljs-built_in">ToString</span><span class="hljs-punctuation">(</span><span class="hljs-punctuation">)</span><span class="hljs-punctuation">)</span>
<span class="hljs-built_in">End</span> <span class="hljs-variable">Try</span>
<span class="hljs-variable">strCalKind</span> <span class="hljs-operator">=</span> <span class="hljs-string">""</span>
<span class="hljs-built_in">End</span> <span class="hljs-variable">Sub</span>
<span class="hljs-variable">Private</span> <span class="hljs-variable">Sub</span> <span class="hljs-type">Button18_Click</span><span class="hljs-punctuation">(</span><span class="hljs-variable">ByVal</span> <span class="hljs-variable">sender</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">Object</span><span class="hljs-operator">,</span> <span class="hljs-variable">ByVal</span> <span class="hljs-variable">e</span> <span class="hljs-variable">As</span> <span class="hljs-variable">System</span><span class="hljs-operator">.</span><span class="hljs-variable">EventArgs</span><span class="hljs-punctuation">)</span> <span class="hljs-variable">Handles</span> <span class="hljs-variable">Button18</span><span class="hljs-operator">.</span><span class="hljs-variable">Click</span>
<span class="hljs-variable">Dim</span> <span class="hljs-variable">length</span> <span class="hljs-variable">As</span> <span class="hljs-built_in">Integer</span>
<span class="hljs-variable">length</span> <span class="hljs-operator">=</span> <span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span><span class="hljs-operator">.</span><span class="hljs-built_in">Length</span>
<span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span> <span class="hljs-operator">=</span> <span class="hljs-variable">TextBox1</span><span class="hljs-operator">.</span><span class="hljs-built_in">Text</span><span class="hljs-operator">.</span><span class="hljs-built_in">Remove</span><span class="hljs-punctuation">(</span><span class="hljs-variable">length</span> <span class="hljs-operator">-</span> <span class="hljs-number">1</span><span class="hljs-operator">,</span> <span class="hljs-number">1</span><span class="hljs-punctuation">)</span>
<span class="hljs-built_in">End</span> <span class="hljs-variable">Sub</span>
<span class="hljs-built_in">End</span> <span class="hljs-variable">Class</span>