A Method to Implement Plug-In Functionality

//*****************************************************************************
//                                                                            *
// Filename : plugin.h                                                        *
// Author   : Eric M Solliday                                                 *
// Date     : January 26, 2009                                                *
// Copyright: 2009, Sherric Group, LLC                                        *
//                                                                            *
// Description:                                                               *
// This is the interface file for the PluginDemo project.                     *
// This file describes the commands that are made available to the core app   *
// by the plug-in library.  The commands included in this file are for        *
// example purposes only.                                                     *
//                                                                            *
// This file is provided under the Code Project Open License (CPOL).          *
// No other warrenties are given or inferred.                                 *
//                                                                            *
//*****************************************************************************

#ifndef PLUGIN_H
#define PLUGIN_H

// Always include windows.h
#include <windows.h>

// Typedefs for the service functions (function pointers)
// In a more meaningful implementation, the signatures here would
// reflect valid data being passed to the service function as arguments.
typedef void (*svcSerialOpen)();
typedef void (*svcSerialClose)();
typedef void (*svcSerialRead)();
typedef void (*svcSerialWrite)();

// Service function lookup structure
typedef struct
{
   svcSerialOpen        SerialOpenFP;
   svcSerialClose       SerialCloseFP;
   svcSerialRead        SerialReadFP;
   svcSerialWrite       SerialWriteFP;
}
tServiceLookup;

// Typedefs for the plugin command functions (function pointers)
// In a more meaningful implementation, the signatures here would
// reflect valid data being passed to the command functions as arguments.
typedef void (*pluginInitFunct)( HWND, tServiceLookup* );
typedef void (*pluginFunct)( HWND );

// Plugin Function pointers
pluginInitFunct   PluginInitFP;
pluginFunct       DeviceResetFP;
pluginFunct       DeviceReadDataFP;
pluginFunct       DeviceWriteDataFP;

// Plugin Functions
extern "C" __declspec(dllexport) void plugin_PluginInit(HWND, tServiceLookup*);
extern "C" __declspec(dllexport) void plugin_DeviceReset(HWND);
extern "C" __declspec(dllexport) void plugin_DeviceWriteData(HWND);
extern "C" __declspec(dllexport) void plugin_DeviceReadData(HWND);



#endif // PLUGIN_H