hab (HAB) - input

      Anchor-block handle.

    prclDest (PRECTL) - output

      Bounding rectangle.

      Note: The value of each field in this structure must be in the range -32 768 through 32 767. The data type WRECT may also be used, if supported by the language.

    prclSrc1 (PRECTL) - input

      First source rectangle.

      Note: The value of each field in this structure must be in the range -32 768 through 32 767. The data type WRECT may also be used, if supported by the language.

    prclSrc2 (PRECTL) - input

      Second source rectangle.

      Note: The value of each field in this structure must be in the range -32 768 through 32 767. The data type WRECT may also be used, if supported by the language.

    rc (BOOL) - returns

      Nonempty indicator.

      TRUE

        prclDest is a nonempty rectangle
      FALSE
        Error, or prclDest is an empty rectangle.

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