How To Query and Modify the States of System Menu Items (83453)
The information in this article applies to:
- Microsoft Platform Software Development Kit (SDK) 1.0, when used with:
- the operating system: Microsoft Windows NT 3.5
- the operating system: Microsoft Windows NT 3.51
- the operating system: Microsoft Windows 2000
- Microsoft Windows Software Development Kit (SDK) 3.1
This article was previously published under Q83453 SUMMARY
An application should query or set states of the Restore, Move, Size,
Minimize, and Maximize items on the system menu during the processing
of a WM_INITMENU or a WM_INITMENUPOPUP message.
MORE INFORMATION
Windows changes the state of the Restore, Move, Size, Minimize, and
Maximize items on the system menu just before it draws the menu on the
screen and sends the WM_INITMENU and WM_INITMENUPOPUP messages.
Windows sets the states of these menu items according to the state of
the window just before the menu is displayed. For example, if the
window is minimized when its system menu is pulled down, the Minimize
menu item is unavailable (grayed). If an overlapped window is
maximized when its system menu is pulled down, the Move, Size, and
Maximize items are unavailable.
If an application queries or sets the state of any of these system
menu items, the query or change should occur during the processing of
the WM_INITMENU or WM_INITMENUPOPUP message. If any menu item state is
queried before one of these messages is processed, it could reflect a
previous state of the window. If any state is set before one of these
messages is processed, Windows will reset the menu items to correspond
to the state of the window just prior to sending these messages.
Windows does not change the state of the Close menu item. Its state
can be changed or queried at any time.
| Modification Type: | Minor | Last Reviewed: | 7/11/2005 |
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| Keywords: | kbhowto kbMenu KB83453 |
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