ReportFilter() Formatting

Hi

I have created a report, where i have placed a simple filter ( for example [Company name] as Report Filter),

i can get the values of Selected report filters by using the function

=ReportFitler([Company Name])

when i select All Company from report filter, it gives me all the values in it, (like adb;avf;adf;dfdsf;dfdfgh;dfdhh;dwfred;dfde;)

i don't want all the names instead i want to display the word "ALL" itself (like ALL)

is that possible ?

help me to bring this one in formula

Regards

Dineshkumar.