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Called to calculate the extra space around the list box item in the popup menu tracked by the built-in button in pixels. If the CSize( -1, -1 ) value is returned, then the grid cell class should compute required size. Otherwise, the grid class is responsible for list box item outer border measurement.

virtualCSize OnGridCellPopupListBoxCalcItemExtraSizes(
   CExtGridCell::TrackCellStateInfo_t & _tcsi,
   LONG nItemNo
) const;


Reference to the helper structure that incapsulates information about the built-in button which drops down a popup menu with a list box.
Item index inside the list box control.

See Also

CExtGridWnd Overview | Class Members | Hierarchy Chart