App1 has a Picturebox. App2 has App1's Picture1.hwnd.
Is it possible to set an object to App1's Picturebox.hwnd and use that object as a picturebox in App2?
What I am asking is can I have a Picturebox in App2, draw lines and circles on it (like how you would do it in MSPaint) and have the drawings appear on App1's picturebox? I would like the show the results on App1's Picturebox in real-time instead of after the figures have been drawn
I know I can use BitBlt to copy (which would be after the figures have been drawn) because it uses the hwnd but can it be done like I'm asking?




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