C++ 6编写供PB调用的DLL

PB调用代码
声明
function boolean test(string x,ref string y) library "test.dll"
按钮
string x,y
y = space(255)
boolean z
x='test'
z = test(x,y)
messagebox('提示',y)

dll功能
使y=x
return true

http://download.csdn.net/download/as375256234/5133200