Basically, a, b, c, d : constantx, y, z, d : arbitaryax + by + cz + d = 0 If we has 3sete of ( x, y, z ), we could the above formula. And, a + bx + c + d = ax + 2c if we found the above, we solved it lke the following: a = ba + c + d = 2c …

If you comment out the below, the program doesn't work even doen't dispatch event:WM_PAINT. wButtonController.cpp::line::187..137:void wButtonController::ProcessWmKeyup () {...185: this->event->main_mode = m_mode;186:187: InvalidateRect( t…