C / C++ / MFC

<br />
#define TIMEOUT 20*1000<br />
<br />
struct ProcessWindow<br />
{<br />
	DWORD processID;<br />
	DWORD threadID;<br />
	HWND hwnd;<br />
};<br />
<br />
static BOOL CALLBACK EnumWindowsProc(<br />
  HWND hwnd,					// handle to the window<br />
  ProcessWindow *lParam   // application-defined value<br />
)<br />
{<br />
	DWORD processID = NULL;<br />
	DWORD threadID = GetWindowThreadProcessId(hwnd, &processID);<br />
<br />
	if (processID == lParam->processID && threadID == lParam->threadID)<br />
	{<br />
		lParam->hwnd = hwnd;<br />
		return FALSE;	// stop enum<br />
	}<br />
<br />
	return TRUE;<br />
}<br />
<br />
HWND StartApp(LPCTSTR path)<br />
{<br />
	STARTUPINFO si;<br />
	ZeroMemory(&si, sizeof(STARTUPINFO));<br />
<br />
	si.cb = sizeof(STARTUPINFO);<br />
	si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;<br />
	si.wShowWindow = SW_HIDE;<br />
<br />
	PROCESS_INFORMATION pi;<br />
<br />
	TCHAR buf[MAX_PATH];<br />
	lstrcpyn(buf, path, MAX_PATH);<br />
<br />
	if (!CreateProcess(NULL, buf, NULL, NULL, FALSE, CREATE_DEFAULT_ERROR_MODE |<br />
		/*CREATE_NEW_CONSOLE | CREATE_NEW_PROCESS_GROUP | CREATE_SEPARATE_WOW_VDM<br />
		| DETACHED_PROCESS |*/ NORMAL_PRIORITY_CLASS, NULL, NULL, &si, &pi))<br />
		return NULL;<br />
<br />
	if(WaitForInputIdle(pi.hProcess, TIMEOUT) != 0)<br />
		return NULL;<br />
<br />
	// get the main window<br />
<br />
	ProcessWindow pw;<br />
	pw.hwnd = NULL;<br />
	pw.processID = pi.dwProcessId;<br />
	pw.threadID = pi.dwThreadId;<br />
<br />
	if (EnumWindows((WNDENUMPROC)EnumWindowsProc, (LPARAM)(LPVOID)&pw))<br />
		return NULL;<br />
<br />
	return pw.hwnd;<br />
}<br />