Controls (buttons, list boxes, etc) usually paint themselves when WM_PAINT is received (e.g. it implements the WM_PAINT message handler). An owner-draw control is one where you provide the WM_PAINT handler. Some controls let you paint the individual contents, such as items of list boxes, which requires that you handle special notifications from the control--the method of owner-drawing in this way varies from control to control.
GLutz78
Posted: Visual C++ Language, Self Drawn v. Owner Drawn
Regarding painting individual contents of list boxes, etc, are you
referring to the DrawItem/MeasureItem functions Are these
functions called implicitly by the OnPaint handler
Martin Richter
Posted: Visual C++ Language, Self Drawn v. Owner Drawn
Yes! The DrawItem and MeasureItem are called by the WM_PAINT handler as often as needed. They give you more control than handling your own WM_PAINT, because you just have to handle one item after another.
So overriding WM_PAINT might disturb the default handling.
