I have a very busy data entry form that uses a number of themed controls (e.g. panel, container, toolstrip, etc.) that "paints" very slowly.  When displayed it paints (almost scrolls) from the bottom up. When a childdialog is popped up over this screen and then closed, the underlying portion of the screen that needs to be "repainted" is very slow.  Again, repainting from bottom to top.

Any ideas as to why or how to speed up the screen painting?  All controls that have a ThemeSupport property are set to Full.