User Exit in MB11 / GOODS MOVEMENT +_+_+

Hi experts,

I have a requirement where I need to know the User exit in MB11.

My requirement is such that when a goods mvmt 261 is done using MB11, It should call a special function (custom program) using a Userexit.

Or a general user exit in goods movement if not (MB11 specifically), so that I can trigger this call for special function.

Any info is greatly appreciated.

Thanks

Preeti

MB1C, MB11, Goods movement.