How To Create a Modeless CPropertySheet with Standard Buttons

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For a modeless CPropertySheet, the Microsoft Foundation Classes (MFC) resize the sheet and hide the standard buttons in the CPropertySheet::OnInitDialog member function. To prevent MFC from doing this, perform the following steps:

• Derive a class from CPropertySheet and override the OnInitDialog function.
• Set "m_bModeless" to FALSE and remove the WF_CONTINUEMODAL style for "m_nFlags".
• Call CPropertySheet::OnInitDialog.
• Set "m_bModeless" back to TRUE and add the style WF_CONTINUEMODAL to "m_nFlags".

The following sample code illustrates this technique:

// CMySheet is derived from CpropertySheet.
// Compile options needed: default.
    
BOOL CMySheet::OnInitDialog()
{
   m_bModeless = FALSE;   
   m_nFlags |= WF_CONTINUEMODAL;

   BOOL bResult = CPropertySheet::OnInitDialog();

   m_bModeless = TRUE;
   m_nFlags &= ~WF_CONTINUEMODAL;
   return bResult;
}
				

In a modeless CPropertySheet object, the OK and Cancel buttons do not close the property sheet when they are clicked. They do send a WM_COMMAND message with IDOK or IDCANCEL to the sheet, and the OnOK or OnCancel functions are called for the page. To close the sheet, you can implement ON_COMMAND handlers for IDOK and IDCANCEL in the CPropertySheet and call the EndDialog function to close the sheet.