Check if a caractere exists in a SQL field

Hi everybody ,
I would like with a Stored procedure check if a caracter exists in a string stored in a SQL server field.
Example :
My field contains the caracters "ABCDEF" ,
I would like to check if "C" is in this string.
Tank Uselect charindex('C', 'ABCDEF') which would return 3. If the first expression is not found in the second, it returns zero.|||Thanks joan but i would like to make the expression 2 a variable wich contains my column name

Remeber the syntax must respect syntax of stored procedure

This is my stored procedure code :
@.level is the caracter i search
@.droits is the caracters contained in my field

IF (@.Level <> "nothing")
BEGIN
SELECT @.droits=droits FROM USERS WHERE UserID=@.UserID
IF NOT SELECT charindex(@.Level, @.droits)


BEGIN
SELECT Progress=2,Errormsg="Pas l'droits."
RETURN
END
SELECT @.AccessNumber = @.AccessNumber + 1
UPDATE USERLOG SET Accessdt=GETDATE(),AccessNumber=@.AccessNumber WHERE SessionID=@.SessionID
SELECT Progress=0,userID=@.userID
RETURN
END

can you help me please ?|||DECLARE @.pos
IF (@.Level <> "nothing")
BEGIN
SELECT @.droits=droits FROM USERS WHERE UserID=@.UserID
SELECT @.pos = charindex(@.Level, @.droits)
IF @.pos > 0
BEGIN
SELECT Progress=2,Errormsg="Pas l'droits."
RETURN
END

SELECT @.AccessNumber = @.AccessNumber + 1
UPDATE USERLOG SET Accessdt=GETDATE(), AccessNumber=@.AccessNumber WHERE SessionID=@.SessionID
SELECT Progress=0,userID=@.userID
RETURN
END|||It works

Thank U guy : ))