hitTest(<nRow>, <nColumn>) --> self

        Determines the screen position specified by <nRow> and <nColumn> is
        on the Get object.

        Applicable Hit Test Return Values
        ---------------------------------------------------------------------
        Value   Constant     Description
        ---------------------------------------------------------------------
         0      HTNOWHERE    The mouse cursor is not within the region of the
                             screen that the GET occupies
        -1025   HTCAPTION    The mouse cursor is on the GET's caption
        -2049   HTCLIENT     The mouse cursor is on the GET
        ---------------------------------------------------------------------

        Button.ch contains manifest constants for the Get:hitTest() return
        values.