Update released.

Included the ShowScrollTips feature. The feature is most useful when the ScrollTrack property is set to False.
The demo project is updated to demonstrate usage of the ScrollTip event.
Code:
Private Sub VBFlexGrid1_ScrollTip(ByVal Row As Long, ByVal Col As Long)
If Row > -1 Then
    VBFlexGrid1.ScrollTipText = "Row " & VBFlexGrid1.TextMatrix(Row, 0)
ElseIf Col > -1 Then
    VBFlexGrid1.ScrollTipText = "Column " & VBFlexGrid1.TextMatrix(0, Col)
End If
End Sub
If you prefer that the scroll tip follows the thumb as the user scrolls set the ScrollTipFollowThumb property to True.