int setCtlProperties(int n, int properties)
Returns an integer with the previous properties before they were change by the function, or -1 if the control number is out of range or if the control doesn't exist.
This function sets the properties of a control. The properties to be set should be specified in the second argument. To remove a property from a control, use clearCtlProperties.
The following properties are available:
// Enable tracking for this control setCtlProperties(6, CTP_TRACK);