dbsrv.h

Visual C++实践与提高-刘刀桂, 孟繁晶编著

#ifndef _DBSERVER_INCLUDE
#define _DBSERVER_INCLUDE

typedef long HRESULT;

#define DEF_EXPORT __declspec(dllexport)

class IDB {
  // Interfaces
  public:
	  	// Interface for data access
		virtual HRESULT Read(short nTable, short nRow, LPWSTR lpszData) =0;
		virtual HRESULT Write(short nTable, short nRow, LPCWSTR lpszData) =0;

		// Interface for database management
		virtual HRESULT Create(short &nTable, LPCWSTR lpszName) =0;
		virtual HRESULT Delete(short nTable) =0;

		// Interfase para obtenber informacion sobre la base de datos
		virtual HRESULT GetNumTables(short &nNumTables) =0;
		virtual HRESULT GetTableName(short nTable, LPWSTR lpszName) =0;
		virtual HRESULT GetNumRows(short nTable, short &nRows) =0;

		virtual ULONG Release() =0;
};

class IDBSrvFactory {
	// Interface
	public:
		virtual HRESULT CreateDB(IDB** ppObject) =0;
		virtual ULONG   Release() =0;
};

HRESULT DEF_EXPORT DllGetClassFactoryObject(IDBSrvFactory ** ppObject);

#endif