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Can you let me know the handler for this?

The CChildView window is the parent for the CYourTabWnd window. So you should invoke the following code in the OnTabWndClickedItem() method

GetParent()->SendMessage( . . .

class CChildView : public CExtTabPageContainerOneNoteWnd
{
     class CYourTabWnd : public CExtTabWnd
     {
protected:
virtual bool OnTabWndClickedItem(LONG nItemIndex,bool bButtonPressed,INT nMouseButton,UINT nMouseEventFlags)
{
bool bRet = CExtTabWnd::OnTabWndClickedItem(nItemIndex,bButtonPressed,nMouseButton,nMouseEventFlags);
            //CSaIsDoc * pDoc = (CSaIsDoc *)((CSaIsMainFrame*)GetParentFrame()->GetActiveDocument());
        if(nItemIndex > 2)
         {
if ( nMouseButton == MK_RBUTTON )
             {
                 //GetPresentationView()->SendMessage(WM_SAIS_SINK_TAB_RIGHT_CLICKED,0,nItemIndex);
                    //CChildView::GetMessageForPresentationView(nItemIndex);
}
            }
return bRet;
}

        

};
virtual CExtTabWnd * OnTabWndGetTabImpl()
{
return new CExtTWPC < CYourTabWnd >;
}
    
I have a query... I wanto send a message to the CSaIsPresentationView class which has an object as a member of CChildView . But in this nested declaration that you have suggested me, it seems difficult to do...

Please respond..Its very urgent.!

This method is required to make the tab page container use the CYourTabWnd control inside it instead of CExtTabWnd that is used by default. This is a very important method because tab item clicks are handled in the CYourTabWnd class.

virtual CExtTabWnd * OnTabWndGetTabImpl()
{
return new CExtTWPC < CYourTabWnd >;
}

Is this part required? If yes then what for

Yes, it’s needed. Every CExtTabPageContainerWnd-derived object uses a built-in CExtTabWnd-derived object (the tabs with which users can switch between pages). OnTabWndClickedItem is method of CExtTabWnd class, so you have to override it in a CExtTabWnd-derived class. With the above OnTabWndGetTabImpl method you make your TabPageContainerWnd class use your TabWnd-derived object. If you don’t override it, the TabPageContainer will use the default tabwnd implementation, not yours.

Use this class as your TabPageContainer. Change the base classes appropietly if you need Whidbey or any other type of tab:

class CYourTabPageContainerWnd : public CExtTabPageContainerWnd
{
	class CYourTabWnd : public CExtTabWnd
	{
	protected:
		virtual bool OnTabWndClickedItem(
			LONG nItemIndex,
			bool bButtonPressed,
			INT nMouseButton, // MK_... values
			UINT nMouseEventFlags
			)
		{
			bool bRet = CExtTabWnd::OnTabWndClickedItem( 
				nItemIndex,
				bButtonPressed,
				nMouseButton,
				nMouseEventFlags
				);
			if ( nMouseButton == MK_RBUTTON ) {
				// nItemIndex indicates which tab item is clicked
				// bButtonPressed is true for WM_LBUTTONDOWN and false for WM_LBUTTONUP
			}
			return bRet;
		}
	};
	virtual CExtTabWnd * OnTabWndGetTabImpl()
	{
		return new CExtTWPC < CYourTabWnd >;
	}
};

Check out Help for more information on OnTabWndClickedItem method.