Knowledge Base

HOWTO: How To Disable Push Buttons on a DialogBar in MFC

Article ID: 152376

Article Last Modified on 11/21/2006

APPLIES TO

This article was previously published under Q152376

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:

  1. Within the declaration of your class, add the declaration for a handler function: 
       afx_msg void OnUpdateButton1(CCmdUI* pCmdUI);
  2. 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()
  3. 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: kbhowto kbuidesign kbdocview kbmfcctrlbar KB152376


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