Enabled, Grayed, and Disabled Menu Items
A menu item can be enabled, grayed, or disabled. By default, a menu item is
enabled. When the user chooses an enabled menu item, Windows sends a command
message to the owner window or displays the corresponding submenu, depending on
what kind of menu item it is.
When menu items are not available to the user, they should be grayed or
disabled. Grayed and disabled menu items cannot be chosen. A disabled item looks just
like an enabled item. When the user clicks on a disabled item, the item is not
selected, and nothing happens. Disabled items can be useful in, for example, a
tutorial that presents a menu that looks active but isn't.
An application grays an unavailable menu item to provide a visual cue to the
user that a command is not available. You can use a grayed item when an action
is not appropriate (for example, you can gray the
Print command in the
File menu when the system does not have a printer installed).
The
EnableMenuItem function enables, grays, or disables a menu item. To determine whether a menu
item is enabled, grayed, or disabled, use the
GetMenuItemInfo function.
Instead of
GetMenuItemInfo, you can also use the
GetMenuState function to determine whether a menu item is enabled, grayed, or disabled.
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