Stored Procedure And Calling User Defined Function

I seem to be getting tasks that I am not familiar with these days. I am a
guy that has coded it all in the asp page or in the code behind in .NET.
This problem is outlined below and I need a help / advice on doing this. I
had the flow of the 3 parts to it expanded below. A call is made to a Stored
Procedure, The SP then calls a user defined function that runs SQL, this
returns a 1 or 0 to the SP which then returns the value back to the call on
the asp page. This is a lot I know but it is the way the lead guy wants it
done. Any help so I can keep most of the hair I have left is appreciated :-)

Short list of process flow:

1. Form.asp calls to rx_sp_HasAccessToClient in SQL SERVER

2. rx_sp_HasAccessToClient then calls ab_HasAccessToClient

3. ab_HasAccessToClient runs SQL command on db and sends return bit back to
rx_sp_HasAccessToClient

4. rx_sp_HasAccessToClient then sends this back to the call in the Form.asp
page

5. Form.asp then checks the Boolean and if 1 then show or if 0 then deny.

<FLOW WITH CODE AND FUNCTIONS :>

This is not the correct syntax but is showing what I understand sort of how
this is to be done so far.

This panel loads up the Vendors and id's when the user clicks on the link
"view detailed list of vendors associated with this client". This is the
beginning of the process.

This is code in Form.asp

'PANEL ONE
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXX----
>

If ValidateInput(Request.Querystring("Postback"))="FormDetails" then 'Check
Postback Type

'We need to load up vendors associated with the current client.

'--------- CHECK ACCESS HERE via function ab_HasAccessToClient
--------

'If the call returns 1, then the employee has access.

'Otherwise, just write out "Access to this client is denied."

'CALL SP - Not sure what parameters need to go with it or its syntax

Execute_SP("rx_sp_HasAccessToClient '" & ClientSSN & "', 1)

'When it returns can check it here........

if ab_HasAccessToClient result is a 1 then

'boolean would be 1 so show panel

Else

'boolean would be 0 so show access denied

'allow them to go back to the original page.

end if

'PANEL ONE
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXX----
>

ON SQL SERVER: Stored Procedure

----------------------------------------------------------
--------------------------------

rx_sp_HasAccessToClient

CREATE PROCEDURE [dbo].[ rx_sp_HasAccessToClient]

@EmployeeID INT,

@ClientSSN varchar(50),

@ReturnBitValue = OUTPUT

/*

' Parameters here passed via call from Form.asp - not sure what is passed
yet.

*/

AS

set nocount on

/*

Written by Mike Belcher 9/27/2007 for Form.asp

'Calls ab_HasAccessToClient function - not sure of the syntax as of yet,
just making flow.

'Gets return bit and passes that back to the call from Form.asp

*/

GO

----------------------------------------------------------
--------------------------------

ON SQL SERVER: User-Defined Function

----------------------------------------------------------
--------------------------------

ab_HasAccessToClient

CREATE FUNCTION ab_HasAccessToClient (@employeeID INT, @ClientSSN
VARCHAR(50))

@ClientSSN varchar(50),

@EmployeeID,

@ReturnBitValue = OUTPUT

AS

SELECT 1

FROM tblEmployeesClients ec

INNER JOIN tblClients c ON ec.ClientID = c.ClientSSN

INNER JOIN tblEmployees e ON ec.Employee = e.EmployeeLogInName

WHERE e.EmployeeID= @EmployeeID

AND c.InActiveClient=0

AND c.ClientSSN = @ClientSSN

'Some Code here to save result bit ..

RETURN @ReturnBitValue 'Back to rx_sp_HasAccessToClient

----------------------------------------------------------
--------------------------------

</FLOW WITH CODE AND FUNCTIONS :>