I'm trying to do something very simple but I think I'm missing a step...
I have a form with a tabsheet control. One of the tabs in the tabsheet control contains a bunch of rectangle objects that have bitmap images assigned to them. I can paint bitmaps on top of the bitmap image in the rectangle, but when I switch tabs and come back my graphical changes are lost. The same goes when I use a drop down combobox and when the list goes away the graphics that were painted are wiped out. HELP!!!!!

Thanks in advance to anyone who knows the simple answer to this.