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Overview |
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Group |
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Quick Info
Windows NT
| Yes
| Win95
| Yes
| Win32s
| Yes
| Import Library
| user32.lib
| Header File
| winuser.h
| Unicode
| No
| Platform Notes
| None
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EnableMenuItem
The EnableMenuItem function enables, disables, or grays the specified menu item.
BOOL EnableMenuItem(
HMENU hMenu,
| // handle to menu
| UINT uIDEnableItem,
| // menu item to enable, disable, or gray
| UINT uEnable
| // menu item flags
| );
|
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Parameters
hMenu
Identifies the menu.
uIDEnableItem
Specifies the menu item to be enabled, disabled, or grayed, as determined by
the uEnable parameter. This parameter specifies an item in a menu bar, menu, or submenu.
uEnable
Specifies flags that control the interpretation of the uIDEnableItem parameter and indicate whether the menu item is enabled, disabled, or grayed.
This parameter must be a combination of either MF_BYCOMMAND or MF_BYPOSITION
and MF_ENABLED, MF_DISABLED, or MF_GRAYED.
Value
| Meaning
| MF_BYCOMMAND
| Indicates that uIDEnableItem gives the identifier of the menu item. If neither the MF_BYCOMMAND nor
MF_BYPOSITION flag is specified, the MF_BYCOMMAND flag is the default flag.
| MF_BYPOSITION
| Indicates that uIDEnableItem gives the zero-based relative position of the menu item.
| MF_DISABLED
| Indicates that the menu item is disabled, but not grayed, so it cannot be
selected.
| MF_ENABLED
| Indicates that the menu item is enabled and restored from a grayed state so
that it can be selected.
| MF_GRAYED
| Indicates that the menu item is disabled and grayed so that it cannot be
selected.
|
Return Values
The return value specifies the previous state of the menu item (it is either
MF_DISABLED, MF_ENABLED, or MF_GRAYED). If the menu item does not exist, the
return value is 0xFFFFFFFF.
Remarks
An application must use the MF_BYPOSITION flag to specify the correct menu
handle. If the menu handle to the menu bar is specified, the top-level menu item
(an item in the menu bar) is affected. To set the state of an item in a
drop-down menu or submenu by position, an application must specify the handle to the
drop-down menu or submenu.
When an application specifies the MF_BYCOMMAND flag, Windows checks all items
that open submenus in the menu identified by the specified menu handle.
Therefore, unless duplicate menu items are present, specifying the menu handle to the
menu bar is sufficient.
The CreateMenu, InsertMenu, InsertMenuItem, LoadMenuIndirect, ModifyMenu, and SetMenuItemInfo functions can also set the state (enabled, disabled, or grayed) of a menu
item.
See Also
CreateMenu, GetMenuItemID, InsertMenu, InsertMenuItem, LoadMenuIndirect, ModifyMenu, SetMenuItemInfo, WM_SYSCOMMAND
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