Minor fixes

From MSDN: "In WM_SYSCOMMAND messages, the four low-order bits of the wParam parameter are used internally by the system. To obtain the correct result when testing the value of wParam, an application must combine the value 0xFFF0 with the wParam value by using the bitwise AND operator." Also calculate the required window size using AdjustWindowRect, rather than hard-coding some constants.
2026-10-04 16:05:11 -04:00
From MSDN: "In WM_SYSCOMMAND messages, the four low-order bits of the
wParam parameter are used internally by the system. To obtain the
correct result when testing the value of wParam, an application must
combine the value 0xFFF0 with the wParam value by using the bitwise AND
operator."
Also calculate the required window size using AdjustWindowRect, rather
than hard-coding some constants.