Gets value idicating whether the back buffer is valid for the specified control.
true if the back buffer is valid for the specified contro, otherwise false.
This methods tests whether the back buffer content is valid for the specified control. If you would reuse the backbuffer, you should always use this method before you get the backbuffer graphics or image to detect, whether your control is the last one which used it.
BackBuffer Class | Resco.Drawing Namespace