Shrinking SQL Server Transaction Logs with SQL-DMO

/////////////////////////////////////////////////////////////////////////////
#ifndef __DMOSINK_H__
#define __DMOSINK_H__

#if defined( _MSC_VER ) && ( _MSC_VER >= 1020 )
	#pragma once
#endif

/////////////////////////////////////////////////////////////////////////////

_COM_SMARTPTR_TYPEDEF( IConnectionPointContainer, __uuidof( IConnectionPointContainer ) );
_COM_SMARTPTR_TYPEDEF( IConnectionPoint, __uuidof( IConnectionPoint ) );

/////////////////////////////////////////////////////////////////////////////

class IBackupSink : public ISQLDMOBackupSink
{
public:
	IBackupSink( IN HWND hWndNotify );

public: // IUnknown implementation

	STDMETHOD( QueryInterface )( IN REFIID riid, IN OUT LPVOID* ppvObj );
	STDMETHOD_( ULONG, AddRef )( void );
	STDMETHOD_( ULONG, Release )( void );

public: // ISQLDMOBackupSink implementation

	STDMETHOD( PercentComplete )( IN SQLDMO_LPCSTR bstrMessage, IN LONG lPercent );
	STDMETHOD( NextMedia )( IN SQLDMO_LPCSTR bstrMessage );
	STDMETHOD( Complete )( IN SQLDMO_LPCSTR bstrMessage );

public:
	DECLARE_WNDMSG( SQLDMO_BACKUPPERCCOMPLETE );
	DECLARE_WNDMSG( SQLDMO_BACKUPCOMPLETE     );
	DECLARE_WNDMSG( SQLDMO_BACKUPNEXTMEDIA    );

protected:
	ULONG	m_ulRef;	
	HWND	m_hWndNotify;
};

/////////////////////////////////////////////////////////////////////////////
#endif // __DMOSINK_H__
/////////////////////////////////////////////////////////////////////////////