Brew MP 1.0.2
This function sets the maximum position value for the slider widget.
The maximum position value determines the number of steps the slider
handle may move through and the maximum value of the integer model data.
int IWidget_SetSliderMaxPos(IWidget *po, uint16 pos);
AEE_SUCCESS - The widget was able to successfully set the maximum position value.
AEE_EFAILED - The widget was unable to set the maximum position value.
If the maximum position is greater than the current value of the position
as store in the model data, the model data is limited to the new maximum