How I Can Implement DirectIO Event Of POS Scanner Using C#

I'm trying to generate error beep sound using DirectIO event of Pos Scanner but I have no idea about the correct parameters.The event name is DirectIO and it took three parameters his syntax is :

 

directIO(DIO_SCANNER_DIO_ERROR_BEEP, data, object);

 

we don't know the parameter accepts by the above event. Could you please provide us more details about the above event with example in C#/VB.Net.

 

Scanner Details: DataLogic Magellan 9800i

 

Thanks,