Get event on Form - Matrix

Hi,

I want to capture any event on a system form Matrix.

I try using this:

if (((pVal.EventType == SAPbouiCOM.BoEventTypes.et_ALL_EVENTS) & (pVal.Before_Action == true)))

{

SBO_Application.StatusBar.SetText("en form 41 all", BoMessageTime.bmt_Short, BoStatusBarMessageType.smt_Success);

}

I want to capture when the matrix is filled by some SAP B1 Process.

How do I ?