How To Disable Push Buttons on a DialogBar in MFC

ID: Q152376

The information in this article applies to:

The Microsoft Foundation Classes (MFC), included with:
- Microsoft Visual C++ for Windows, 16-bit edition, versions 1.0, 1.5, 1.51, 1.52, 1.52b, 1.52c
- Microsoft Visual C++, 32-bit Editions, 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 query words: 1.00 1.50 1.51 1.52 2.00 2.10 2.20 4.00 4.10


Keywords          : kbDocView kbMFC KbUIDesign kbVC 
Version           : 1.00 1.50 1.51 1.52 | 1.00 2.00
Platform          : NT WINDOWS 
Issue type        :

Last Reviewed: August 5, 1999