MFC: Context Help (? Button) to Title Bar of MDIframe

[M khalid khan]

In MFC how can we add (?)context help button in title bar of childframe. I tried to add window style on precreatewindow but it does not display help button in title bar. I know how to add contexthelp on dialogs and propertysheet but I am unable to add for child frame window

BOOL CChildFrame::PreCreateWindow(CREATESTRUCT& cs)
{
cs.style &= ~WS_MAXIMIZEBOX;
cs.style &= ~WS_MINIMIZEBOX;
cs.style |= WS_SYSMENU;
cs.style |= WS_EX_CONTEXTHELP;
if( !CMDIChildWnd::PreCreateWindow(cs) )
return FALSE;

return TRUE;
}

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