🚀 go-pugleaf

I am writing a graphics program that takes a long time to generate the
image.  I was wondering what the best way of doing redraws is.  The only
way I can think of that would provide good performance is to create a
memory context of the window as well as a screen context and draw to both.
In this way, when I get the WM_PAINT message I just BitBlt from the memory
context to the screen context.

Is there a way of achiving the same without having to open two HPS, and
drawing to both?  (like an option when opening the window to tell the 
OS to maintain both the screen and memory context)  

Thanks for your help

James