Determines the width and height required to display the items of a list view control.
The proposed dimensions of the control, in pixels. If dimensions are not specified, the framework uses the current width or height values of the control.
Number of items to be displayed in the control. If this parameter is -1, the framework uses the total number of items currently in the control.
A CSize object that contains the approximate width and height needed to display the items, in pixels.
This member function implements the behavior of the Win32 macro, ListView_ApproximateViewRect, as described in the Windows SDK.