This section describes the support the slider control provides for graphical user interfaces (GUIs). Except where noted, this support conforms to the guidelines in the SAA CUA Advanced Interface Design Reference.
Since slider values all are mutually exclusive, only one of them can be selected at a time. Therefore, the only type of selection supported by the slider control is single selection.
Note: If more than one slider window is open, selecting values in one slider window has no effect on the values selected in any other slider window. For linear sliders, a black square is drawn in the center of the slider arm to show which slider control window has the focus.
An initial value is selected when the slider control is first displayed. If the application does not provide the initial selection for a linear slider (using the SLM_SETSLIDERINFO message) to position the slider arm, the value at the home position is selected automatically. The home position is the end of the slider that contains the lowest value on the scale.