golang呼叫cmd命令時如何隱藏dos窗口

透過go的標準函式庫exec呼叫cmd指令時會閃彈黑窗口，為解決此問題在windows下可以用win32 API 的 WinExec。

此問題主要出現在帶有UI或無控制台的程式呼叫cmd時。

編譯go時加入參數：

go build  -ldflags="-H windowsgui"

package main
import (
	"errors"
	"
)
import (	
    "github.com/CodyGuo/win"
)
var (
	winExecError = map[uint32]string{		
	0:  "The system is out of memory or resources.",		
	2:  "The .exe file is invalid.",		
	3:  "The specified file was not found.",		
	11: "The specified path was not found.",
	}
)
func main() {
	err := execRun("cmd /c start http://www.baidu.com")	
	if err != nil {
		log.Fatal(err)
	}
}
func execRun(cmd string) error {
	lpCmdLine := win.StringToBytePtr(cmd)	
//http://baike.baidu.com/link?url=51sQomXsIt6OlYEAV74YZ0JkHDd2GbmzXcKj_4H1R4ILXvQNf3MXIscKnAkSR93e7Fyns4iTmSatDycEb
HrXzq
	ret := win.WinExec(lpCmdLine, win.SW_HIDE)	
	if ret <= 31 {		
	    return errors.New(winExecError[ret])
	}	return nil
}

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