Using ON_UPDATE_COMMAND_UI in Property Pages

Using ON_UPDATE_COMMAND_UI message maps in property pages is the same as in dialogs except for one extra step required.

You need to derive a class from CPropertySheet and intercept the WM_KICKIDLE messages.

1. Use class wizard to create a new class called CMyPropSheet with a base class of CPropertSheet.
2. In the header add the message function. afx_msg LRESULT OnIdleUpdateCmdUI(WPARAM, LPARAM);
3. In the source file #include afxpriv.h
4. Add the message map ON_MESSAGE(WM_KICKIDLE, OnKickIdle)
5. Implement the function.

LRESULT CMyPropSheet::OnKickIdle(WPARAM, LPARAM)
{
	SendMessageToDescendants(WM_WM_KICKIDLE, 0, 0, FALSE, FALSE);
	return 0;
}

The property sheet now passes all WM_KICKIDLE message to its property pages.

In the property page class, just add a message map for WM_KICKIDLE and call UpdateDialogControls.

LRESULT CMyPropPage::OnKickIdle(WPARAM, LPARAM)
{
	UpdateDialogControls(this, FALSE);
	return 0L;
}

Then all you need is ON_UPDATE_COMMAND_UI message maps.

P.S.
This does not work for modeless property sheets.
You need to trap the WM_IDLEUPDATECMDUI message in the property sheet’s
owner window and send it WK_KICKIDLE messages.

Date Posted: 08/13/98

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