Capturing a window with WPF

Question

With Windows Presentation Foundation, if I have an HWND, how can I capture it\'s window as an image that I can manipulate and display?

Answer 1

You can:

1. CreateBitmap() to create a hBitmap
2. Call GetDC() on the hWnd
3. BitBlt() the contents to the hBitmap
4. ReleaseDC()
5. Call Imaging.CreateBitmapSourceFromHBitmap() to create a managed BitmapSource
6. DeleteObject() on the hBitmap
7. Use the BitmapSource as desired

Steps 1-4 and 6 use the Win32 API (GDI to be precise), Steps 5 and 7 are done using WPF