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  Arguments
 
    segment    Integer expression representing the segment address
 
    offset     Integer expression representing the offset address
 
  Returns
 
    POINTER    A pointer value set to the segment:offset address
 
  Description
 
    The Ptr function constructs a pointer from a 32-bit memory address
    represented by 16-bit addresses in a segment argument and an offset
    argument. The result can be assigned to a pointer variable or used
    in place of a pointer variable.
 
    To set a pointer variable to the returned address:
 
       pointer_variable := Ptr( segment, offset );
 
    The pointer result is not typed. To use the returned pointer,
    dereference and typecast the returned value. For example, to get
    the first byte at the returned address:
 
       result := Byte( Ptr( segment, offset )^ );