detect active window and redraw?

[RHL]

Hello all! : )
well, I came to ask for help, I know how I can detect when a window goes of background to active or when a window is redraws?
some reference or code, please  :U

[dedndave]

the window receives a WM_SIZE message
wParam carries additional information
http://msdn.microsoft.com/en-us/library/windows/desktop/ms632646%28v=vs.85%29.aspx

you can also use WM_ACTIVATE
http://msdn.microsoft.com/en-us/library/windows/desktop/ms646274%28v=vs.85%29.aspx

but, WM_SIZE carries more info - the window is sent both messages, along with a few others

[RHL]

thanks dedndave, I will make tests and comment  :thumbu