system函数隐藏控制台窗口

在 MFC 等环境下调用 system 函数时，会短暂闪烁一个控制台窗口。解决方法是在创建进程时将窗口设置为隐藏。

void   Utils::system_hide_cmd(const string &cmd)
{
	WCHAR path[MAX_PATH];
	GetSystemDirectoryW(path, MAX_PATH);
	string x = Utils::toAscii(path);
	x += "\\cmd.exe";

	SHELLEXECUTEINFOW ShExecInfo = { 0 };
	ShExecInfo.cbSize = sizeof(SHELLEXECUTEINFO);
	ShExecInfo.fMask = SEE_MASK_NOCLOSEPROCESS;
	ShExecInfo.hwnd = NULL;
	ShExecInfo.lpVerb = NULL;
	ShExecInfo.lpFile = Utils::toUnicode(x.c_str());
	ShExecInfo.lpParameters = Utils::toUnicode(cmd.c_str());
	ShExecInfo.nShow = SW_HIDE;
	ShExecInfo.hInstApp = NULL;
	ShellExecuteExW(&ShExecInfo);
	WaitForSingleObject(ShExecInfo.hProcess, INFINITE);////wait for exit

}