When debugging, and i come cross a line such as

UpdateWindow (hwnd) ;

which will send a paint message, when debugging, even if i press f11 (step into), debug, does not go into wndprocess. Is there a way of debugging where it also steps through the cases in wndprocess when their called?

the only way i can do it, is if i place a breakpoint on the first line of code of each case, such as WM_PAINT etc. Which works ok, but when it comes to the end of that particualr case, and should then jump back to the function that called it, a debugg error complains of their being no source code to return to?