最近在用vlc的sdk時發現Vlc在Qt中以sdk方式呼叫時，會出現播放的控制元件滑鼠事件失效。解決的辦法：

// First step is start a timer when you play a video,

// Second step : in the timer function i call :
EnumChildWindows(MyWindow_HWND, EnumerateVLC, NULL);

// Third step : if EnumerateVlc get some child window these window is the VlcEventWindow, and need disable it, to reach mouse events on MyWindow
BOOL CALLBACK EnumerateVLC(HWND hWndvlc, LPARAM lParam) {
   EnableWindow(hWndvlc, FALSE); 
   // And kill timer, i only need get this handle one time.
   return TRUE;
}

// When EnumerateVLC is called all mouse events are redirected to MyWindow

這是參考自：https://forum.videolan.org/viewtopic.php?f=32&t=92568#

在Qt中的具體程式如下：

在標頭檔案中：

Private:

QTimer *timer;             //定義定時器

HWND parentwnd;    //準備視窗的控制代碼

Private slots:

void timerproc();          //定義定時器的槽函式

在cpp中：

parentwnd=(HWND)this->winId();            //獲取父視窗控制代碼

timer=new QTimer

connect(timer,SIGNAL(timeout()),this,SLOT(timerproc()));

然後在視訊開啟後呼叫timer:timer->start();

void frmMain::timerproc()     

{

    EnumChildWindows(parentwnd, EnumerateVLC, NULL);

}

BOOL CALLBACK EnumerateVLC(HWND hWndvlc, LPARAM lParam) {

EnableWindow(hWndvlc, FALSE);

// And kill timer, i only need get this handle one time.

timer->stop();

return TRUE;

}