usInfoType (USHORT)

      Information attribute.

      Attribute that identifies the requested information. It can be one of the following:

      SMA_SHAFTDIMENSIONS

        Queries for the length and breadth of the slider shaft.
      SMA_SHAFTPOSITION
        Queries for the x-, y-position of the lower-left corner of the slider shaft.
      SMA_SLIDERARMDIMENSIONS
        Queries for the length and breadth of the slider arm.
      SMA_SLIDERARMPOSITION
        Queries for the position of the slider arm. The position can be returned either as an increment position or a range value.

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