usArmPosType (USHORT)

      Format attribute.

      Identifies the format in which the information should be interpreted by the slider if setting the slider arm position is requested. This value is a reserved field for other set requests. The format is one of the following:

      SMA_RANGEVALUE

        Number of pixels between the home position and the current arm position.
      SMA_INCREMENTVALUE
        Increment position using the primary scale.

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