windows-server-2003/multimedia/wmdm_sr1/mdsp/lyrasp/mdspenumdevice.h

//
//  Microsoft Windows Media Technologies
//  � 1999 Microsoft Corporation.  All rights reserved.
//
//  Refer to your End User License Agreement for details on your rights/restrictions to use these sample files.
//

// MSHDSP.DLL is a sample WMDM Service Provider(SP) that enumerates fixed drives.
// This sample shows you how to implement an SP according to the WMDM documentation.
// This sample uses fixed drives on your PC to emulate portable media, and 
// shows the relationship between different interfaces and objects. Each hard disk
// volume is enumerated as a device and directories and files are enumerated as 
// Storage objects under respective devices. You can copy non-SDMI compliant content
// to any device that this SP enumerates. To copy an SDMI compliant content to a 
// device, the device must be able to report a hardware embedded serial number. 
// Hard disks do not have such serial numbers.
//
// To build this SP, you are recommended to use the MSHDSP.DSP file under Microsoft
// Visual C++ 6.0 and run REGSVR32.EXE to register the resulting MSHDSP.DLL. You can
// then build the sample application from the WMDMAPP directory to see how it gets 
// loaded by the application. However, you need to obtain a certificate from 
// Microsoft to actually run this SP. This certificate would be in the KEY.C file 
// under the INCLUDE directory for one level up. 


// MDSPEnumDevice.h : Declaration of the CMDSPEnumDevice

#ifndef __MDSPENUMDEVICE_H_
#define __MDSPENUMDEVICE_H_

/////////////////////////////////////////////////////////////////////////////
// CMDSPEnumDevice
class ATL_NO_VTABLE CMDSPEnumDevice : 
	public CComObjectRootEx<CComSingleThreadModel>,
	public CComCoClass<CMDSPEnumDevice, &CLSID_MDSPEnumDevice>,
	public IMDSPEnumDevice
{
public:
	CMDSPEnumDevice();


DECLARE_REGISTRY_RESOURCEID(IDR_MDSPENUMDEVICE)

BEGIN_COM_MAP(CMDSPEnumDevice)
	COM_INTERFACE_ENTRY(IMDSPEnumDevice)
END_COM_MAP()

// IMDSPEnumDevice
public:
	ULONG m_nCurOffset;
	ULONG m_nMaxDeviceCount;
	WCHAR m_cEnumDriveLetter[MDSP_MAX_DRIVE_COUNT];
	STDMETHOD(Clone)(/*[out]*/ IMDSPEnumDevice **ppEnumDevice);
	STDMETHOD(Reset)();
	STDMETHOD(Skip)(/*[in]*/ ULONG celt, /*[out]*/ ULONG *pceltFetched);
	STDMETHOD(Next)(/*[in]*/ ULONG celt, /*[out]*/ IMDSPDevice **ppDevice, /*[out]*/ ULONG *pceltFetched);
};

#endif //__MDSPENUMDEVICE_H_