How To Disable Push Buttons on a DialogBar in MFC

Last reviewed: July 31, 1997
Article ID: Q152376

1.00 1.50 1.51 1.52 | 1.00 2.00 2.10 2.20 4.00 4.10

WINDOWS             | WINDOWS NT

kbprg kbhowto

The information in this article applies to:

The Microsoft Foundation Classes (MFC), included with: - Microsoft Visual C++ for Windows, versions 1.0, 1.5, 1.51, 1.52,
```
     1.52b, 1.52c
```
- Microsoft Visual C++, 32-bit Edition, versions 1.0, 2.0, 2.1, 2.2,
```
     4.0, 4.1
```

SUMMARY

Push-button controls on a DialogBar cannot be disabled by calling EnableWindow. The following code has no effect:

   GetDlgItem(IDC_BUTTON1)->EnableWindow(FALSE);

This article describes how to implement push-button controls that can be disabled.

MORE INFORMATION

Controls on a DialogBar behave like the bitmaps on a Toolbar. They can be enabled or disabled by manually adding an ON_UPDATE_COMMAND_UI within the message map of the appropriate class (such as CMainFrame).

Step-by-Step Example

After you have placed a control on your DialogBar, such as a push-button with a resource ID of IDC_BUTTON1, use the following steps to manage the state of the control:

Within the declaration of your class, add the declaration for a handler function:

afx_msg void OnUpdateButton1(CCmdUI* pCmdUI);

Within the implementation of your class, add a manual entry in the message map:

BEGIN_MESSAGE_MAP(CMainFrame, CMDIFrameWnd)

       //{{AFX_MSG_MAP(CMainFrame)
       ...
       //}}AFX_MSG_MAP
       ON_UPDATE_COMMAND_UI(IDC_BUTTON1, OnUpdateButton1)

END_MESSAGE_MAP()

Provide the definition of the handler function, as follows:

   void CMainFrame::OnUpdateButton1(CCmdUI* pCmdUI)
   {
       pCmdUI->Enable( TRUE );
   }

Additional reference words: 1.00 1.50 1.51 1.52 2.00 2.10 2.20 4.00 4.10
KBCategory: kbprg kbhowto
KBSubcategory: MfcUI MfcDocView
Keywords : MfcDocView MfcUI kbhowto kbprg
Technology : kbMfc
Version : 1.00 1.50 1.51 1.52 | 1.00 2.00
Platform : NT WINDOWS

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.

Last reviewed: July 31, 1997
© 1998 Microsoft Corporation. All rights reserved. Terms of Use.