hi,
I am writing monitoring application , which enum and save every handles which is running. by sending and reciving WM_GETTEXT messages i retrieve some information as well. Bu this process runs everytime even if text is not changed. Is there any way to trigger text extraction process if that specific windows get change.

Suppose if i am extracting aol text , then is there anyway to extract text only when data gets change otherwise leave it. I dont wana play with Strings to compare what was the last message but i need to find a way on event call of window change...

i hope i have cleared what ia m asking

thanks in advamce