I am using double buffering specifically BitBlt(). Over my offscreen buffer I draw other windows (trackbar, input box, button) I am quite surprised that this works because it never worked before in my previous appz.
The problem is that when the window is redrawn completely (If i move my track bar or another windows moves over the first one) all the other windows disappear. They simply get overdrawn but dont redraw themselves on top. To redraw even those child windows I need to resize the original window
What shall I do in this case when I use BitBlt()?
Thank you for help