falsevalue: integer): integer;
        <span style="color:navy"><b>FUNCTION</b></span> valuetagbit: longword;
        <span style="color:navy"><b>FUNCTION</b></span> gridvaluetagbit (const index: integer): longword;
        <span style="color:navy"><b>PROPERTY</b></span> valuebitmask: longword <span style="color:navy"><b>READ</b></span> getvaluebitmask <span style="color:navy"><b>WRITE</b></span> setvaluebitmask;
        <span style="color:navy"><b>PROPERTY</b></span> gridvaluebitmask[const index: integer]: