EnableWindow function

Enables or disables mouse and keyboard input to the specified window or control. When input is disabled, the window does not receive input such as mouse clicks and key presses. When input is enabled, the window receives all input.

Syntax


BOOL WINAPI EnableWindow(
  _In_  HWND hWnd,
  _In_  BOOL bEnable
);

Parameters

hWnd [in]

Type: HWND

A handle to the window to be enabled or disabled.

bEnable [in]

Type: BOOL

Indicates whether to enable or disable the window. If this parameter is TRUE, the window is enabled. If the parameter is FALSE, the window is disabled.

Return value

Type: BOOL

If the window was previously disabled, the return value is nonzero.

If the window was not previously disabled, the return value is zero.

Remarks

If the window is being disabled, the system sends a WM_CANCELMODE message. If the enabled state of a window is changing, the system sends a WM_ENABLE message after the WM_CANCELMODE message. (These messages are sent before EnableWindow returns.) If a window is already disabled, its child windows are implicitly disabled, although they are not sent a WM_ENABLE message.

A window must be enabled before it can be activated. For example, if an application is displaying a modeless dialog box and has disabled its main window, the application must enable the main window before destroying the dialog box. Otherwise, another window will receive the keyboard focus and be activated. If a child window is disabled, it is ignored when the system tries to determine which window should receive mouse messages.

By default, a window is enabled when it is created. To create a window that is initially disabled, an application can specify the WS_DISABLED style in the CreateWindow or CreateWindowEx function. After a window has been created, an application can use EnableWindow to enable or disable the window.

An application can use this function to enable or disable a control in a dialog box. A disabled control cannot receive the keyboard focus, nor can a user gain access to it.

Requirements

Minimum supported client

Windows 2000 Professional [desktop apps only]

Minimum supported server

Windows 2000 Server [desktop apps only]

Header

Winuser.h (include Windows.h)

Library

User32.lib

DLL

User32.dll

See also

Reference
CreateWindow
CreateWindowEx
IsWindowEnabled
WM_ENABLE
Conceptual
Keyboard Input

 

 

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