VC++.进程顶层窗口1

struct _PidHwnd
{
	DWORD m_dwPid;
	HWND m_hWnd;
};
BOOL CALLBACK _EnumWins(IN HWND h, IN LPARAM p)
{
	if (p)
	{
		_PidHwnd *pItem = (_PidHwnd*)p;
		DWORD dwPid = 0;
		GetWindowThreadProcessId(h, &dwPid); /*句柄所属进程*/
		if (dwPid == pItem->m_dwPid && IsWindowVisible(h) && 0 == GetParent(h)) /*顶层可见窗口*/
		{
			pItem->m_hWnd = h;
			return FALSE; /*成功匹配，退出枚举*/
		}
	}
	return TRUE; /*继续枚举*/
}
HWND GetProcessTopWnd1(IN DWORD dwPid)
{
	_PidHwnd item = { 0 };
	item.m_dwPid = dwPid;
	EnumWindows(_EnumWins, (LPARAM)&item);
	return item.m_hWnd;
}

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 = GetProcessTopWnd1(pi.dwProcessId);
			Sleep(1000);
		}
		printf("%d %08X \r\n", h, h);
	}

	return 0;
}