[Lazarus] Passing Sender to a sub procedure

[Terry A. Haimann]

Is there away I can pass a variable from sender (A String Grid) to a sub 
Procedure.  When I try I get a:

  "main.pas(264,86) Error: Only class class methods, class properties 
and class variables can be accessed in class methods"

This is from the procedure called by an event and I need to do this 
multiple times and having it the main procedure is bad programming, 
makes a larger app and will be harder to debug.