usInfoType (USHORT)

Component attribute.

Identifies the slider component that is to be modified. Specify one of the following:

SMA_SHAFTDIMENSIONS

Sets the width (for vertical sliders) or height (for horizontal sliders) of the slider shaft.
SMA_SHAFTPOSITION
Sets the x-, y-position of the lower-left corner of the slider shaft in the slider window.
SMA_SLIDERARMDIMENSIONS
Sets the width and height of the slider arm.
SMA_SLIDERARMPOSITION
Sets the position of the slider arm. This value can be specified either as an increment position or a range value.

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.

ulInfo (ULONG)

New value.

New value to change the slider component to. The format of the information depends on the component being changed and is indicated by the SMA_* message attribute or attributes that are set.

• If the SMA_SHAFTDIMENSIONS attribute is set, the ulInfo parameter is as follows:

  usShaftBreadth (USHORT)

  Width (for vertical sliders) or height (for horizontal sliders) the slider shaft should be set to, in pixels. This is the breadth the shaft should be.
  
  If the SMA_SHAFTPOSITION attribute is set, the ulInfo parameter is as follows:

  xShaftCoord (USHORT)

  X-coordinate to set the position of the shaft to within the slider window. This value is expressed in window coordinates and represents the lower-left corner of the shaft.
  yShaftCoord (USHORT)
  Y-coordinate to set the position of the shaft to within the slider window. This value is expressed in window coordinates and represents the lower-left corner of the shaft.
  
  If the SMA_SLIDERARMDIMENSIONS attribute is set, the ulInfo parameter is as follows:

  usArmLength (USHORT)

  Length of the slider arm, in pixels. This is the width of the arm for horizontal sliders and the height of the arm for vertical sliders.
  usArmBreadth (USHORT)
  Breadth of the slider arm, in pixels. This is the height of the arm for horizontal sliders and the width of the arm for vertical sliders.
  
  If the SMA_SLIDERARMPOSITION and SMA_RANGEVALUE attributes are set, the ulInfo parameter is as follows:

  usArmPos (USHORT)

  Number of pixels to be set from home to the slider arm.
  
  If the SMA_SLIDERARMPOSITION and SMA_INCREMENTVALUE attributes are set, the ulInfo parameter is as follows:

  usIncrementPos (USHORT)

  Increment value which corresponds to the position the slider arm should be set to.

  rc (BOOL)

  Success indicator.

  TRUE

  Slider component was successfully set.
  FALSE
  An error occurred. The WinGetLastError function may return the following errors:

  • PMERR_INVALID_PARAMETERS 
    PMERR_PARAMETER_OUT_OF_RANGE.

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