golang win32编程的一个dll坑

例子

 

package main



import (

	"github.com/lxn/win"

	"strconv"

	"syscall"

)



func _TEXT(_str string) *uint16 {

	return syscall.StringToUTF16Ptr(_str)

}

func _toString(_n int32) string {

	return strconv.Itoa(int(_n))

}

func main() {

	var hwnd win.HWND

	cxScreen := win.GetSystemMetrics(win.SM_CXSCREEN)

	cyScreen := win.GetSystemMetrics(win.SM_CYSCREEN)

	win.MessageBox(hwnd, _TEXT("屏幕长-:"+_toString(cxScreen)+"宽:"+_toString(cyScreen)), _TEXT(" 消息"), win.MB_OK)

}

 

唯一的就是有一个win这个go module里有一个坑，在phd.go 中

 

func init() {

// Library

libpdhDll = syscall.MustLoadDLL("pdh.dll")





// Functions

pdh_AddCounterW = libpdhDll.MustFindProc("PdhAddCounterW")

pdh_AddEnglishCounterW = libpdhDll.MustFindProc("PdhAddEnglishCounterW") // XXX: only supported on versions > Vista.

pdh_CloseQuery = libpdhDll.MustFindProc("PdhCloseQuery")

pdh_CollectQueryData = libpdhDll.MustFindProc("PdhCollectQueryData")

pdh_GetFormattedCounterValue = libpdhDll.MustFindProc("PdhGetFormattedCounterValue")

pdh_GetFormattedCounterArrayW = libpdhDll.MustFindProc("PdhGetFormattedCounterArrayW")

pdh_OpenQuery = libpdhDll.MustFindProc("PdhOpenQuery")

pdh_ValidatePathW = libpdhDll.MustFindProc("PdhValidatePathW")

}

PdhAddEnglishCounterW这个api只在vista以上版本支持，所以如果在xp下运行，在载入时会因找不到该函数的地址崩溃，临时解决方案，暴力注释掉

 

 

//pdh_AddEnglishCounterW = libpdhDll.MustFindProc("PdhAddEnglishCounterW") // XXX: only supported on versions > Vista.

 

更丰富的例子：https://github.com/lxn/walk

初步感觉用go写win gui，是个没意思的事情！