FIX: MDI Child Window's "Minimize" System Menu Disabled

SYMPTOMS

After creating a new multiple document interface (MDI) child window in an MDI application, the child window's Minimize System menu option will be disabled after the following actions:

1. The MDI child window is created and in the topmost z-order.
2. The user accesses the MDI child window's System menu through the shortcut keys: ALT+SPACE, RIGHT ARROW.

These actions will cause the child window's System menu to appear with the Minimize menu option disabled. This behavior can be demonstrated with File Manager. From File Manager's Window menu, choose New Window. Next, press ALT+SPACE and then press the RIGHT ARROW key to bring up the new window's System menu. The Minimize option will be disabled.

NOTE: The Minimize menu item is not disabled if the System menu is accessed through the ALT+"-" (minus) shortcut key or the mouse. Also, the Minimize menu item is not disabled if the window is moved.