- Add the same protection to MDI_AugmentFrameMenu as one existing in
  MDI_RestoreFrameMenu against repetitive calls.
- Use Windows default icon for system menu bitmap if there is no one
  supplied by a child window as Windows does.
- Use GetSystemMenu() to load system menu for a child window,
  otherwise there is no way to generate WM_SYSCOMMAND menu messages.
- Restore check in WM_SIZE MDI child handler erroneously removed
  earlier.

1 file changed