ProSysLib: Dissecting the Process

#include "stdafx.h"
#include "resource.h"
#include "ProSysLib_i.h"
#include "ProSysModule.h"
#include "dlldatax.h"
#include "AutoObject.h"

CProSysLibModule _Module;

CProSysLibModule::CProSysLibModule()
{
	::InitializeCriticalSection(&m_cs);

	m_hResInstance = NULL;

	m_bWinSockets = false;
	DWORD dwOSVersion = ::GetVersion();
	DWORD dwMajorVersion = (DWORD)(LOBYTE(LOWORD(dwOSVersion)));
    DWORD dwMinorVersion = (DWORD)(HIBYTE(LOWORD(dwOSVersion)));
	m_bWin2000 = (dwMajorVersion == 5 && !dwMinorVersion);
}

CProSysLibModule::~CProSysLibModule()
{
	::DeleteCriticalSection(&m_cs);
}

bool CProSysLibModule::IsWin2000()
{
	return m_bWin2000;
}

bool CProSysLibModule::InitWinSockets()
{
	CCritSecLock cs(m_cs);

	if(m_bWinSockets)
		return true; // Already initialized;

	// Initialize Windows Socket Support;
	WORD wVersionRequested = MAKEWORD(2, 2);
	WSADATA wsaData;
	m_bWinSockets =::WSAStartup(wVersionRequested, &wsaData)?false:true;

	return m_bWinSockets;
}

void CProSysLibModule::SetResourceInstance(HINSTANCE hInstance)
{
	m_hResInstance = hInstance;
}

HINSTANCE CProSysLibModule::GetResourceInstance()
{
	return m_hResInstance;
}

void CProSysLibModule::InitLibId()
{
	CAtlModule::m_libid = LIBID_ProSysLib;
}

void CProSysLibModule::OnModuleStart()
{
	// This is where we can initialize global objects;
}

void CProSysLibModule::OnModuleTerminate()
{
	// This is where we can uninitialize global objects;
	//

	// Shutting down WinSockets, if they were in use:
	CCritSecLock cs(m_cs);
	if(m_bWinSockets)
	{
		::WSACleanup();
		m_bWinSockets = false;
	}
	cs.Unlock();

}