Listing 3. Code snippets from smpshpin.cpp and smpdspm.def

smpshpin.cpp and smpdspm.def contribute to the implementation of a shell plug-in that monitors messages passed through the OpenDoc dispatcher and then relays them to PMPrintf. Complete versions of these files are shipped with OpenDoc for OS/2.

// smpshpin.cpp
#ifndef _SHPLUGIN_
#include 
#endif
...
extern "C" {
APIRET APIENTRY MyShellPlugInInstallProc( Environment*,
                             ODDraft*,
                             ODShellPlugInActionCodes*);
}

APIRET APIENTRY MyShellPlugInInstallProc( Environment* ev,
                    ODDraft* draft,
                ODShellPlugInActionCodes* action)
{
    ODSession* session =
    draft->GetDocument(ev)->GetContainer(ev) \\ continued
         ->GetStorageSystem(ev)->GetSession(ev);

    ODDispatcher* dispatcher = session->GetDispatcher(ev);

    ODDispatchModule* dspmod = new SampleDispatchMonitor;
    // This call instantiates a monitor which is
    // implemented separately

    dspmod->InitDispatchModule(ev, session);
    // This call initializes the monitor

     ...
}
============================================================
(Name of file:  SMPDSPM.DEF)

LIBRARY cntnrprt INITINSTANCE
DESCRIPTION 'Sample Shell Plug-In Class Library'
PROTMODE
DATA MULTIPLE NONSHARED LOADONCALL
EXPORTS
    ODShellPlugInInstallProc = MyShellPlugInInstallProc
============================================================