通过go的标准库exec调用cmd命令时会闪弹黑窗口，为解决此问题在windows下可以用win32 API 的 WinExec。

此问题主要出现在带UI或无控制台的程序调用cmd时。

编译go时加入参数：

go build  -ldflags="-H windowsgui"

package mainimport ("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_4H1R4ILXvQNf3MXIscKnAkSR93e7Fyns4iTmSatDycEbHrXzqret := win.WinExec(lpCmdLine, win.SW_HIDE)if ret <= 31 {    return errors.New(winExecError[ret])}return nil}

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