I don't know how much control you have over the external program, or how it draws to your picture box, but if you are using createGraphics it won't work.
You can take a screenshot of just the active window by using ALT+PRINTSCREEN. That will capture the current active window as a bitmap to the clipboard. Paste that into a bitmap editing tool, crop to just the area you want.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.