如何使用GO导入用C编写的DLL函数？

I'm looking for an example code how import a function from a dll written in C. equivalent to DllImport of C#.NET. It's possible? I'm using windows. any help is appreciated. thanks in advance.

You want to use cgo. Here's an introduction.

Use the same method that the Windows port of Go does. See the source code for the Windows implementation of the Go syscall package. Also, take a look at the source code for the experimental Go exp/wingui package

There are a few ways to do it.

The cgo way allows you to call the function this way:

import ("C")
...
C.SomeDllFunc(...)

It will call libraries basically by "linking" against the library. You can put C code into Go and import the regular C way.

There are more methods such as syscall

import (
    "fmt"
    "syscall"
    "unsafe"
)

// ..

kernel32, _        = syscall.LoadLibrary("kernel32.dll")
getModuleHandle, _ = syscall.GetProcAddress(kernel32, "GetModuleHandleW")

...

func GetModuleHandle() (handle uintptr) {
    var nargs uintptr = 0
    if ret, _, callErr := syscall.Syscall(uintptr(getModuleHandle), nargs, 0, 0, 0); callErr != 0 {
    abort("Call GetModuleHandle", callErr)
    } else {
        handle = ret
    }
    return
}

There is this useful github page which describes the process of using a DLL: https://github.com/golang/go/wiki/WindowsDLLs

There are three basic ways to do it.