message means that subtract doesn't work well. 20191120 g:20 p_evt->uMsg: 6551900 &uMsg: 6551900 WM_PAINT 002: 15 *(p_evt->uMsg):20 uMsg: 15 WM_MESSG 003: 15 *(p_evt->uMsg):20 wButtonController::Process: 20 / 15<-WM_PAINT wParam 167845005 …