The distracting thing about that statement is that I've used a RichEdit for years now with GUI changes under WM_InitDialog, with nary an occasion of bleed through. I can't reconcile why I see it now and did not see it in my apps from the last several years.
The bleed through effect displayed by Post #11 does not occur on Win7 64Bit.
It seems that there must have been differences in the way that Desktop Windows Management handles presentation to screen, introduced in more recent Win10 systems.
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