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my problem was using WS_EX_COMPOSITED extended style with parent window.
can i use the WS_EX_COMPOSITED without affect the windows messages?

1 - i can't find it in these forum...sorry;
2 - you have right, but sometimes isn't easy to understand where is the error, that's why i give all the code :(
thanks for all

npow i know why: because the window use the WS_EX_COMPOSITED extended style. thanks for all

i did these class with some help(for connect the window procedure to control):

#include <Windowsx.h>
#include <windows.h>
#include <fstream>
#include <iostream>
#include <string>
#include...