Well, there may be several ways:
Create a form with a text box control where you put the string you are trying to find and activate it via on key label.

other way is writing some code on the grid1.coumn1.title.click(), where you activate the find-form wich also must have a button with something like this:

locate for at(thisform.text1.text,form1.grid1.column1.text1.text)>0

HTH