My English is not perfect, sorry.
I am using Visual C++ 2019 16.9.2 Community, and MFC.
I have an MDI program:
class CIDEView: public CScrollView
At OnEraseBkgnd, I called FillOutSideRect. This paints not the whole window, only what is out of the content to scroll: top lelt corner remains white. So, in OnDraw, I must paint this. This is time: painted with white, after it, painted with dark blue (0x800000). I want to spare the time. How can I set the (default) background color of the window? I analyzed CREATESTRUCT, but I did not find this. Thank you.