golang调用dll，windows

冷知识

syscall包 并不会使用cgo，不用安装mingw-x64编译器， import "C"采用使用cgo

使用syscall.LoadLibrary(dllPath)函数加载dll，syscall.Syscall(...)函数调用具体的函数接口

func GoCallDll2(a, b int) uintptr {
	dllFile, _ := syscall.LoadLibrary(dllFileName)
	fmt.Println("+++++++syscall.LoadLibrary:", dllFile, "+++++++")
	defer syscall.FreeLibrary(dllFile)
	add, err := syscall.GetProcAddress(dllFile, "add")
	fmt.Println("GetProcAddress", add)

	ret, _, err := syscall.Syscall(add,
		2,
		IntPtr(a),
		IntPtr(b),
		0)
	if err != nil && IsFinishError(err) {
		fmt.Println(dllFileName+fmt.Sprintf(":%d+%d", a, b)+"运算结果为:", ret)
	} else {
		fmt.Println(fmt.Sprintf("%+v", err))
	}
	return ret
}

使用syscall.NewLazyDLL()加载dll，使用接口函数.Call(uintptr类型的参数)来调用函数

func GoCallDll1(a, b int) uintptr {
	dllFile := syscall.NewLazyDLL(dllFileName)
	fmt.Println("dll:", dllFile.Name)
	add := dllFile.NewProc("add")
	fmt.Println("+++++++NewProc:", add, "+++++++")

	ret, _, err := add.Call(IntPtr(a), IntPtr(b))
	if err != nil && IsFinishError(err) {
		fmt.Println(dllFileName+fmt.Sprintf(":%d+%d", a, b)+"运算结果为:", ret)
	} else {
		fmt.Println(fmt.Sprintf("%+v", err))
	}
	return ret
}

使用syscall.MustLoadDLL(dllPath)加载dll，函数接口函数.Call(参数列表)调用

func GoCallDll3(a, b int) uintptr {
	DllTestDef := syscall.MustLoadDLL(dllFileName)
	add := DllTestDef.MustFindProc("add")

	fmt.Println("+++++++MustFindProc：", add, "+++++++")
	ret, _, err := add.Call(IntPtr(a), IntPtr(b))
	if err != nil && IsFinishError(err) {
		fmt.Println(dllFileName+fmt.Sprintf(":%d+%d", a, b)+"结果为:", ret)
	} else {
		fmt.Println(fmt.Sprintf("%+v", err))
	}
	return ret
}

• 原文链接：https://blog.csdn.net/aaaadong/article/details/120656628