The Mac OS 8.5 Control Manager provides the following functions for changing control settings:
SetControl32BitValue
changes the current setting of a control and redraws it accordingly.GetControl32BitValue
obtains the current setting of a control.SetControl32BitMinimum
changes the minimum setting of a control and, if appropriate, redraws it accordingly.GetControl32BitMinimum
obtains the minimum setting of a control.SetControl32BitMaximum
changes the maximum setting of a control and, if appropriate, redraws it accordingly.GetControl32BitMaximum
obtains the maximum setting of a control.