find string in my files

[Brujah]

Hy folks,

sometimes I have the problem that I can't remember in which files I use a specific variable.
So I want to display all files that include this string and it would be great to display the lines of code too.

I tried
cat *.pb ! grep variable

But in this way I can't find out the filenames.

Is there another way to do it ?

Markus

[Saboteur]

grep variable *.pb

[Inner]

cat *.pb | grep veriable
8O