Programming Guide - Actian

How You Can Communicate with an External Program Using External User EventsstatusSpecifies a return variable that is an output integer variable that indicatesthe success or failure of the procedure. If the return value is IIW4GL_OK,the send was successful. If the return value is a nonzero value, the sendfailed (the text of the error message is in errormsg). Declare this as “intstatus.”External User Event DemoIf you have installed the OpenROAD Development package, a sample isprovided to demonstrate how external user events are used to facilitate thecommunication from a 3GL application to an OpenROAD application. The demofiles are included in the following directory:Windows%II_SYSTEM%\ingres\w4glsamp\exteventUNIX or Linux$II_SYSTEM$/ingres/w4glsamp/exteventFor instructions to use the demo, see the appropriate section, following, foryour platform.How the External User Event Demo Works on WindowsThe directory %II_SYSTEM%\ingres\w4glsamp\extevent contains the followingfiles:extevent.expIs an export file of the OpenROAD application used to run the sampleapplicationextevent.c, extev.h, extevent.rcAre source files for a non-OpenROAD executablemakefileIs a makefile for building the external applicationTo use the demo application, you must perform the following basic steps:1. Build the 3GL application.2. Import the sample application into your database.3. Run the sample application.See the following sections for details on each of these steps.Inter-Frame Communication Techniques 353