hwnd | The window that has had its region changed. |
code | Notify code. |
lParam | The value that was passed to WinWatchNotify. |
WINWATCHNOTIFY_START | First thing sent to callback. |
WINWATCHNOTIFY_STOP | Last thing sent to callback. |
WINWATCHNOTIFY_DESTROY | Window has been destroyed. |
WINWATCHNOTIFY_CHANGING | Visible region is about to change. |
WINWATCHNOTIFY_CHANGED | Visible region has changed. |