"output" var in sql Server

I am writing a proceduce in sqlServer:
create proc AddCustomerProc (            
      @FullName nvarchar(100),
      @DateOfBirth datetime,
      @sex bit,
      @Address nvarchar(200),
      @Email varchar(100),
      @Tel char(15),
      @Company nvarchar(200),
      @CountryID char(5),
      @Foreign bit,
      @IDNo char(15),
      @CustomerID char(10)output) as
begin
      --declare @CustomerID char(10)
      declare @temp int
      select @CustomerID=max(Customers.CustomerID) from Customers
      --cat dau
      set @CustomerID= substring(@CustomerID,3,len(@CustomerID)-2)
      set @temp= convert(int,@CustomerID)+1
      set @CustomerID='KH'+convert(char(10),@temp)
      insert into Customers values(
            @CustomerID,
            @FullName,
            @DateofBirth,
            @Sex,
            @Address,
            @Email,
            @Tel,
            @Company,
            @CountryID,
            @Foreign,
            @IDNo)      
end

End then I creates a sqlCommand object in C# language.
sqlCommand.Parameter.Add("@FullName","bucminhqua") ;
the same at others paramater, but i don't known do this with "output @CustomerID" var.
Can you help me?
thank you!
bucminhquaAsked:
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adatheladConnect With a Mentor Commented:
Hi,

For the output parameter:
sqlCommand.Parameters.Add("@CustomerID", SqlDbType.Char, 10).Direction = ParameterDirection.Output

Once you've executed it, you can then retrieve the value like this:
sqlCommand.Parameters["@CustomerID"].Value
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