Event parameter setting

Hi All,

I have a event DISPLAY of the BOR Object ZTESTBOR.

The Event DISPLAY has a parameter 'Matnr' of type mara-matnr.

Now i want to start a work flow when the event is triggered.

So i have done the binidng in the worl flow.

How can i pass a value say '1000001' to Matnr ( i.e the event parameter ) and then trigger the event so that the work flow container element can take the value in the container element so that i can use it in the WF.

Can u suggest any FM's or documents where this could be found.