Have you set the picturebox background image layout mode to Stretch, like in the example? If the library is simply setting the BackgroundImage, then you should be able to simply resize the picturebox to change the display size. If this doesn't work and the library is paint directly to the screen, then you may need to reinitialise the library when you resize (which would be very annoying), or retrieve the frame buffer every frame and paint the picturebox yourself (or assign the buffer image to the backgroundImage of the picturebox yourself)