what do you mean by invalid region??
also pls help with the following ques wid their ans in true or false manner.
A window application must ensure that it calls PostQuitMessage() alteast once to terminate the message loop.
32 bit programs anre more immune to certain problem involving threads then 16-bit??
The effect of HideCaret is additive.
Repeat count is always 1 for key up message.
5' Window 98/NT are non preemptive multitasking enviroment.
6. Program can call WndProc indirectly.