With the help of other functions
=IF(LEFT(A1,3)="abc","do","don't")
will look at the 3 first characters
=IF(ISNUMBER(SEARCH("abc",A1)),"do","don't")
will look for the string "abc"
=IF(COUNTIF(A1:A1,"*abc*")>0,"do","don't")
will actually use wildcards, the above basically is the same as the search
formula
Regards,
Peo Sjoblom