INSTR action Scans a string for the presence of a second string. syntax INSTR ("string1", "string2") parameters String1 The string to search in. String2 The string to search for. returns ? Offset of the first character of string2 found in string1 0 String2 not present in string1 example $x = INSTR(@DOMAIN, "TEST")   ; check if domain contains the string "TEST"