<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html lang="en-us" xml:lang="en-us"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="security" content="public" /> <meta name="Robots" content="index,follow" /> <meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' /> <meta name="DC.Type" content="task" /> <meta name="DC.Title" content="Use CL procedures" /> <meta name="abstract" content="This gives an overview of the types of operations performed using CL procedures" /> <meta name="description" content="This gives an overview of the types of operations performed using CL procedures" /> <meta name="DC.subject" content="CL procedure, using, example, typical, control processing with CL command, processing, using CL command, control processing, controlling processing, control language (CL), program" /> <meta name="keywords" content="CL procedure, using, example, typical, control processing with CL command, processing, using CL command, control processing, controlling processing, control language (CL), program" /> <meta name="DC.Relation" scheme="URI" content="clpro.htm" /> <meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" /> <meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1998, 2006" /> <meta name="DC.Format" content="XHTML" /> <meta name="DC.Identifier" content="workp" /> <meta name="DC.Language" content="en-us" /> <!-- All rights reserved. Licensed Materials Property of IBM --> <!-- US Government Users Restricted Rights --> <!-- Use, duplication or disclosure restricted by --> <!-- GSA ADP Schedule Contract with IBM Corp. --> <link rel="stylesheet" type="text/css" href="./ibmdita.css" /> <link rel="stylesheet" type="text/css" href="./ic.css" /> <title>Use CL procedures</title> </head> <body id="workp"><a name="workp"><!-- --></a> <!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script> <h1 class="topictitle1">Use CL procedures</h1> <div><p>This gives an overview of the types of operations performed using CL procedures</p> <div class="section"> <div class="p">In general, you can: <ul><li>Use variables, logic control commands, expressions, and built-in functions to manipulate and process data within a CL procedure: <pre>PGM DCL &C *LGL DCL &A *DEC VALUE(22) DCL &B *CHAR VALUE(ABCDE) • • • CHGVAR &A (&A + 30) • • • IF (&A < 50) THEN(CHGVAR &C '1') • DSPLIB ('Q' ∨∨ &B) • IF (%SST(&B 5 1)=E) THEN(CHGVAR &A 12) • • • ENDPGM</pre> </li> <li>Use a system value as a variable in a CL procedure. <br /><img src="rbafn551.gif" alt="Use a system value as a variable in a CL procedure." /><br /></li> <li>Use a job attribute as a variable in a CL procedure. <br /><img src="rbafn552.gif" alt="Use a job attribute as a variable in a CL procedure." /><br /></li> <li>Send and receive data to and from a display file with a CL procedure. <br /><img src="rbafn553.gif" alt="Send and receive data to and from a display file with a CL procedure." /><br /></li> <li>Create a CL procedure to monitor error messages for a job, and take corrective action if necessary. <pre> PGM MONMSG MSGID(CPF0001) EXEC(GOTO ERROR) CALL PROGA CALL PROGB RETURN ERROR: SNDPGMMSG MSG('A CALL command failed') MSGTYPE(*ESCAPE) ENDPGM</pre> </li> <li>Control processing among procedures and programs and pass parameters from a CL procedure to other procedures or programs to override files.</li> </ul> <br /><img src="rbafn554.gif" alt="Control processing among procedures and programs and pass parameters from a CL procedure to other procedures or programs to override files." /><br /></div> <p>Used as a controlling procedure, a CL procedure can call procedures written in other languages. The preceding illustration shows how control can be passed between a CL procedure and RPG IV* and ILE COBOL procedures in an application. To use the application, a workstation user would request program A, which controls the entire application. The illustration shows a single bound program (PGMA) that is called using the CALL command with PGMA. PGMA consists of: </p> <ul><li>A CL procedure (PGMA) calling an RPG IV procedure (PGMB)</li> <li>An RPG IV procedure (PGMB) calling another RPG IV procedure (PGMC)</li> <li>An RPG IV procedure (PGMB) calling a CL procedure (PGMD)</li> <li>A CL procedure (PGMA) calling an ILE COBOL procedure (PGME)</li> <li>An ILE COBOL procedure (PGME) calling a CL procedure (PGMF)</li> </ul> <br /><img src="rbafn502.gif" alt="The following illustration shows how control can be passed between a CL procedure and RPG IV* and ILE COBOL procedures in an application." /><br /><p>The procedures can be created as indicated in the following example. You can enter source for procedures in separate source members. </p> <pre> CRTCLMOD PGMA CRTRPGMOD PGMB CRTRPGMOD PGMC CRTCLMOD PGMD CRTCBLMOD PGME CRTCLMOD PGMF CRTPGM PGM(PGMA) + MODULE(PGMA PGMB PGMC PGMD PGME PGMF) + ENTMOD(*FIRST)</pre> </div> </div> <div> <div class="familylinks"> <div class="parentlink"><strong>Parent topic:</strong> <a href="clpro.htm" title="This provides tasks and concepts specific to CL programming.">CL programming</a></div> </div> </div> </body> </html>