/// <summary>
/// Capture window
/// The whole idea is to pick the window that we want to capture with mouse click
/// First, we will use an transparent window to catch user click point
/// Then we will use 'WindowFromPoint' native method to get the window handle
/// </summary>
private void ClickWindowToCapture()
{
// The target window
IntPtr hWnd;
// Create a dummy window to capture click point
Window DummyWindow = new Window()
{
WindowStyle = WindowStyle.None,
Topmost = true,
ShowInTaskbar = false,
AllowsTransparency = true,
Background = Brushes.Black,
Opacity = 0.1,
WindowState = WindowState.Maximized,
ResizeMode = ResizeMode.NoResize
};
Point ClickedPoint = new Point();
// On press {ESC}: Cancel window capturing
DummyWindow.KeyUp += (s, e) =>
{
if (e.Key == Key.Escape)
{
DummyWindow.Close();
this.Show();
}
};
// On mouse click: Get position
DummyWindow.MouseDown += (s, e) =>
{
ClickedPoint = e.GetPosition(DummyWindow);
};
// After click
DummyWindow.MouseUp += (s, e) =>
{
if (ClickedPoint.X > 5 &&
ClickedPoint.X < (SystemParameters.PrimaryScreenWidth - 5) &&
ClickedPoint.Y > 5 &&
ClickedPoint.Y < (SystemParameters.PrimaryScreenHeight - 5))
{
// We don't need it anymore
DummyWindow.Close();
// Get window handle from that position
hWnd = NativeMethods.WindowFromPoint(new System.Drawing.Point((int)ClickedPoint.X, (int)ClickedPoint.Y));
NativeMethods.SetForegroundWindow(hWnd);
// Capture window
BitmapSource bSource = ScreenCapturer.CaptureWindow(hWnd);
HandleCapture(bSource);
}
};
notification.ShowBalloonTip(this.Title, "Click the window you want to capture", BalloonIcon.Info);
this.Hide();
DummyWindow.Show();
}
