private IntPtr LowLevelClipboardProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
switch (msg)
{
case (int)InterceptClipboard.ClipboardEvent.WM_CHANGECBCHAIN:
if (wParam == hWndNextViewer)
{
// clipboard viewer chain changed, need to fix it.
hWndNextViewer = lParam;
}
else if (hWndNextViewer != IntPtr.Zero)
{
// pass the message to the next viewer.
InterceptClipboard.SendMessage(hWndNextViewer, msg, wParam, lParam);
}
break;
case (int)InterceptClipboard.ClipboardEvent.WM_DRAWCLIPBOARD:
// clipboard content changed
hookedClipboardCallbackAsync.BeginInvoke(true, null, null);
// pass the message to the next viewer.
InterceptClipboard.SendMessage(hWndNextViewer, msg, wParam, lParam);
break;
}
return(IntPtr.Zero);
}
public void Dispose()
{
// remove this window from the clipboard viewer chain
InterceptClipboard.ChangeClipboardChain(hWndSource.Handle, hWndNextViewer);
hWndNextViewer = IntPtr.Zero;
hWndSource.RemoveHook(this.LowLevelClipboardProc);
//pnlContent.Children.Clear();
}
public ClipboardListener(System.Windows.Window w)
{
hookedLowLevelClipboardProc = (InterceptClipboard.LowLevelClipboardProc)LowLevelClipboardProc;
WindowInteropHelper wih = new WindowInteropHelper(w);
hWndSource = HwndSource.FromHwnd(wih.Handle);
hWndSource.AddHook(LowLevelClipboardProc); // start processing window messages
hookedClipboardCallbackAsync = new ClipboardCallbackAsync(ClipboardListener_ClipboardCallbackAsync);
hWndNextViewer = InterceptClipboard.SetClipboardViewer(hWndSource.Handle); // set this window as a viewer
}
