NAME
AddEpilogue — Add code to the end of a proc.
SYNOPSIS
AddEpilogue ProcName Epilogue
DESCRIPTION
Return Value
None.
Arguments
ProcNameName of proc to add epilogue to.
EpilogueCode to add to the end of the proc body.
More Info
Note that one could alternatively use the trace command.

For information regarding exceptions / errors, see here.
EXAMPLES 
% proc Tester {one two} {puts "$one $two"}
% Tester a b
a b
% AddEpilogue Tester {puts "123"}
% Tester c d
c d
123
SEE ALSO
AddPrologue, trace
KEYWORDS
append, command, concatenate, procedure