VC代码：
if(hWnd)
        {
            HWND hForeWnd = ::GetForegroundWindow();
            DWORD dwForeID = ::GetWindowThreadProcessId(hForeWnd,NULL);
            DWORD dwCurID = ::GetCurrentThreadId();
            ::AttachThreadInput(dwCurID,dwForeID,TRUE);
            ::ShowWindow(hWnd,SW_SHOWNORMAL);
            ::SetWindowPos(hWnd,HWND_TOPMOST,0,0,0,0,SWP_NOSIZE|SWP_NOMOVE);
            ::SetWindowPos(hWnd,HWND_NOTOPMOST,0,0,0,0, SWP_NOSIZE|SWP_NOMOVE);
            ::SetForegroundWindow(hWnd);
            ::AttachThreadInput(dwCurID,dwForeID,FALSE);
            return 0;
        }
自己改写的运行出错：
        Dim hForeWnd As Integer = GetForegroundWindow()
        Dim dwForeID As Integer = GetWindowThreadProcessId(hForeWnd, 0)
        Dim dwCurID As Integer = GetCurrentThreadId()
        AttachThreadInput(dwCurID, dwForeID, 1)
        ShowWindow(hWnd, SW_SHOWNORMAL)
        SetWindowPos(hWnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOSIZE And SWP_NOMOVE)
        SetWindowPos(hWnd, HWND_NoTopmost, 0, 0, 0, 0, SWP_NOSIZE And SWP_NOMOVE)
        SetForegroundWindow(hWnd)
        AttachThreadInput(dwCurID, dwForeID, 0)

问题找到了，SWP_NOSIZE And SWP_NOMOVE错了，应为：SWP_NOSIZE + SWP_NOMOVE