VC++.进程顶层窗口2

HWND GetProcessTopWnd2(IN DWORD dwPid)
{
	HWND ret = 0;
	try
	{
		DWORD dwEnumPid = 0;
		HWND hEnumWnd = GetTopWindow(0);
		while (hEnumWnd)
		{
			::GetWindowThreadProcessId(hEnumWnd, &dwEnumPid);
			if (dwPid == dwEnumPid)
			{
				LONG lStyle = ::GetWindowLong(hEnumWnd, GWL_STYLE);
				if ((lStyle & WS_VISIBLE) && (GetParent(hEnumWnd) == 0)) /*顶层可见窗口*/
				{
					ret = hEnumWnd;
					break;
				}
			}
			hEnumWnd = GetWindow(hEnumWnd, GW_HWNDNEXT);
		}
	}
	catch (...)
	{
		OutputDebugStringA(__FUNCTION__);
	}
	return ret;
}

int main()
{
	STARTUPINFO si = { 0 };
	si.cb = sizeof(si);
	PROCESS_INFORMATION pi = { 0 };
	BOOL b = CreateProcess(_T("C:\\Using\\winmine.exe"), 0, 0, 0, 0, 0, 0, 0, &si, &pi);
	HWND h = 0;
	if (b)
	{
		for (int i = 0; i < 5 && !h; ++i)
		{
			h = GetProcessTopWnd2(pi.dwProcessId);
			Sleep(1000);
		}
		printf("%d %08X \r\n", h, h);
	}

	return 0;
}