dbsrvfact.cpp

Visual C++实践与提高-刘刀桂, 孟繁晶编著

#include "stdafx.h"
#include "DBsrvImp.h"

// {30DF3430-0266-11cf-BAA6-00AA003E0EED}
static const GUID CLSID_DBSAMPLE = 
{ 0x30df3430, 0x266, 0x11cf, { 0xba, 0xa6, 0x0, 0xaa, 0x0, 0x3e, 0xe, 0xed } };

// {30DF3431-0266-11cf-BAA6-00AA003E0EED}
static const GUID IID_IDBSrvFactory = 
{ 0x30df3431, 0x266, 0x11cf, { 0xba, 0xa6, 0x0, 0xaa, 0x0, 0x3e, 0xe, 0xed } };

// Create a new database object and return a pointer to it
HRESULT CDBSrvFactory::CreateDB(IDB** ppvDBObject) {
	 *ppvDBObject=(IDB*) new CDB;
	 return NO_ERROR;
}

ULONG CDBSrvFactory::Release() {
	delete this;
	return 0;
}

STDAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, void** ppObject) {
	if (rclsid!=CLSID_DBSAMPLE) {
		return CLASS_E_CLASSNOTAVAILABLE;
		}
	if (riid!=IID_IDBSrvFactory) {
		return E_INVALIDARG;
		}
	*ppObject=(IDBSrvFactory*) new CDBSrvFactory;
	return NO_ERROR;
}