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)

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

// {30DF3432-0266-11cf-BAA6-00AA003E0EED}
extern const GUID IID_IDB;
//{ 0x30df3432, 0x266, 0x11cf, { 0xba, 0xa6, 0x0, 0xaa, 0x0, 0x3e, 0xe, 0xed } };

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

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

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

		//virtual ULONG Release() =0;
};

#endif