vc 判断某个盘符是否为移动硬盘盘符

在使用GetDriveType获取磁盘类型时，一般小容量的U盘直接返回DRIVE_REMOVABLE，倒是不用再进行下一步的判断，而大容量U盘和移动硬盘的盘符返回值和本地硬盘盘符返回值都是DRIVE_FIXED，需要再进行判断，如果是IDE硬盘的话，则盘符所属的磁盘为本地磁盘，否则为可移动磁盘。下面的函数可判断一个磁盘是否为IDE硬盘的分区，传递的磁盘盘符参数形式为C:的形式：

BOOL IsIDE(CString   DriveName)   
{   
	本段程序的前提是DriveName是已经过GetDriveType的判断是本地磁盘,否则报错,作用是判断是否是真正的本地磁盘   
	//111111111111111111111111111111111111111/   
	///获得某分区(目的地址)的信息/   
	HANDLE   hDeviceDest   =   NULL;   
	DWORD   nBytesRead   =   0;//预设为0，当缓冲区的长度不够时，该值为所需的缓冲区的长度   
	DWORD   nBufferSize   =   sizeof(PARTITION_INFORMATION);   
	PPARTITION_INFORMATION   lpPartInfo   =   (PPARTITION_INFORMATION)malloc(nBufferSize);   
	if(lpPartInfo   ==   NULL)   
	{   
		//MessageBox("缓冲区分配出错!","失败!",MB_OK);   
		return   FALSE;   
	}   
	memset(lpPartInfo,   0,   nBufferSize);//将缓冲区lpPartInfo的内容设为nDiskBufferSize个NULL   
	//CString   DriveName="J:";//为判断提供接口   
	DriveName=_T("\\\\.\\")+DriveName;   

	hDeviceDest   =   CreateFile(LPCTSTR(DriveName),//注意一定要是\\\\.\\的形式,CreateFile的要求   ""\\??\\Volume{e9233817-90be-11d6-88b7-00e04c3de005}   
		GENERIC_READ,   
		FILE_SHARE_READ   |   FILE_SHARE_WRITE,   
		NULL,   OPEN_EXISTING,   
		0,   NULL);   

	if(hDeviceDest   ==   NULL)   
	{   
		//MessageBox("CreateFile出错!","失败!",MB_OK);   
		return   FALSE;   
	}   
	/获得该分区信息/   
	BOOL   ret1=DeviceIoControl(   
		hDeviceDest,   
		IOCTL_DISK_GET_PARTITION_INFO,   
		NULL,   
		0,   
		(LPVOID)   lpPartInfo,   
		(DWORD)   nBufferSize,   
		(LPDWORD)   &nBytesRead,   
		NULL//指向一个异步的结构体   
		);   

	if   (!ret1)   
	{   
		LPVOID   lpMsgBuf;   
		FormatMessage(     
			FORMAT_MESSAGE_ALLOCATE_BUFFER   |     
			FORMAT_MESSAGE_FROM_SYSTEM   |     
			FORMAT_MESSAGE_IGNORE_INSERTS,   
			NULL,   
			GetLastError(),   
			MAKELANGID(LANG_NEUTRAL,   SUBLANG_DEFAULT),   //   Default   language   
			(LPTSTR)   &lpMsgBuf,   
			0,   
			NULL     
			);   
		//::MessageBox( NULL,(LPCTSTR)lpMsgBuf,   _T("Error"),   MB_OK   |   MB_ICONINFORMATION   );   
		LocalFree(   lpMsgBuf   );   
		//MessageBox("DeviceIoControl出错!","失败!",MB_OK);   
		return     FALSE;   
	}   
	///导出该分区信息///   
	LARGE_INTEGER   StartingOffset=lpPartInfo->StartingOffset;   
	LONGLONG   QuadPart=StartingOffset.QuadPart;//取上面的值之一情形,支持64位整型   
	LARGE_INTEGER   PartitionLength=lpPartInfo->PartitionLength;   
	LONGLONG   QuadPart1=PartitionLength.QuadPart;//取上面的值之一情形,支持64位整型   
	DWORD   HiddenSectors=lpPartInfo->HiddenSectors;   
	DWORD   PartitionNumber=lpPartInfo->PartitionNumber;   
	BYTE     PartitionType=lpPartInfo->PartitionType;   
	BOOLEAN   BootIndicator=lpPartInfo->BootIndicator;   
	BOOLEAN   RecognizedPartition=lpPartInfo->RecognizedPartition;   
	BOOLEAN   RewritePartition=lpPartInfo->RewritePartition;   

	free(lpPartInfo);   
	CloseHandle(hDeviceDest);   

	/查询注册表中COUNT(Disk)的值//   
	UINT   IDESeqNum;//IDE的序号   
	BOOL   FindIDE=FALSE;   

	HKEY   hKEY;   
	RegOpenKeyEx(HKEY_LOCAL_MACHINE,_T("SYSTEM\\CurrentControlSet\\Services\\Disk\\Enum"),   0,   KEY_READ,   &hKEY);     
	///接收DWORD型/   

	DWORD   Type;//仅仅用于接收数据类型   
	DWORD   dwValue;   
	DWORD   dwBufLen   =   sizeof(DWORD);   
	long   ret2=::RegQueryValueEx(hKEY,   _T("Count"),   NULL,   &Type,   (BYTE*)&dwValue,   &dwBufLen);   
	if(ret2!=ERROR_SUCCESS)   
	{   
		//MessageBox("找不到磁盘的个数","提示",MB_OK);   
		return   FALSE;//失败   
	}   
	for   (UINT   k=0;   k<dwValue;   k++)   
	{       
		///接收字符型/   
		TCHAR   str[256];   
		DWORD     sl   =   256;       
		CString   nDisk;   
		nDisk.Format(_T("%u"),k);   
		RegQueryValueEx(hKEY,     nDisk,     NULL,     NULL,     (LPBYTE)str,     &sl);   //注意第三项必须设为NULL,否则接收到的字符数据出错     
		CString   temp=str;   
		if   (temp.Left(3)== _T("IDE") )  
		{   
			IDESeqNum=k;//IDE的序号   
			FindIDE=TRUE;   
		}   

	}   
	if   (!FindIDE)       
		return   FALSE;       //     IDESeqNum=0;   
	RegCloseKey(hKEY);       

	CString   temp;   
	temp.Format(_T("%u"),IDESeqNum);   
	temp=_T("\\\\.\\PHYSICALDRIVE")+temp;//为下一步检测作准备   
	//22222222222222222222222222222222222222222   /   


	HANDLE   hDevice   =   NULL;   
	DWORD   nDiskBytesRead   =   0;//预设为0，当缓冲区的长度不够时，该值为所需的缓冲区的长度   
	DWORD   nDiskBufferSize   =   sizeof(DRIVE_LAYOUT_INFORMATION)   +   sizeof(PARTITION_INFORMATION)*104;//26*4   
	PDRIVE_LAYOUT_INFORMATION   lpDiskPartInfo   =   (PDRIVE_LAYOUT_INFORMATION)malloc(nDiskBufferSize);   

	if(lpDiskPartInfo   ==   NULL)   
	{   
		//MessageBox("缓冲区分配出错!","失败!",MB_OK);   
		return   FALSE;   
	}   
	memset(lpDiskPartInfo,   0,   nDiskBufferSize);//将缓冲区lpDiskPartInfo的内容设为nDiskBufferSize个NULL   

	//获得所有分区的信息///   
	hDevice   =   CreateFile(LPCTSTR(temp),//注意一定要是\\\\.\\的形式,CreateFile的要求   ""\\??\\Volume{e9233817-90be-11d6-88b7-00e04c3de005}   
		GENERIC_READ,   
		FILE_SHARE_READ   |   FILE_SHARE_WRITE,   
		NULL,   OPEN_EXISTING,   
		0,   NULL);   

	if(hDevice   ==   NULL)   
	{   
		//MessageBox("CreateFile出错!","失败!",MB_OK);   
		return   FALSE;   
	}   

	/获得某磁盘上的所有分区信息/   
	BOOL   ret=DeviceIoControl(   
		hDevice,   
		IOCTL_DISK_GET_DRIVE_LAYOUT,   
		NULL,   
		0,   
		(LPVOID)   lpDiskPartInfo,   
		(DWORD)   nDiskBufferSize,   
		(LPDWORD)   &nDiskBytesRead,   
		NULL   
		);   

	if   (!ret)   
	{   
		LPVOID   lpMsgBuf;   
		FormatMessage(     
			FORMAT_MESSAGE_ALLOCATE_BUFFER   |     
			FORMAT_MESSAGE_FROM_SYSTEM   |     
			FORMAT_MESSAGE_IGNORE_INSERTS,   
			NULL,   
			GetLastError(),   
			MAKELANGID(LANG_NEUTRAL,   SUBLANG_DEFAULT),   //   Default   language   
			(LPTSTR)   &lpMsgBuf,   
			0,   
			NULL     
			);   
		//MessageBox(   (LPCTSTR)lpMsgBuf,   "Error",   MB_OK   |   MB_ICONINFORMATION   );   
		LocalFree(   lpMsgBuf   );   
		//MessageBox("DeviceIoControl出错!","失败!",MB_OK);   
		return   FALSE;   
	}   

	//导出分区信息///   
	DWORD   PartitionCount=lpDiskPartInfo->PartitionCount;     //永远是实际的分区数的4倍,不能用的分区将会显示类型PARTITION_ENTRY_UNUSED,即分区类型为0   
	///依次获取导出某分区信息,并与目的驱动器进行比较///   
	for   (UINT   i=0;   i<PartitionCount;   i=i+4)//+4是因为只有下标为4的整数倍的值才是正确的引用   
	{   
		PARTITION_INFORMATION   DiskPartInfo=lpDiskPartInfo->PartitionEntry[i];//0为C:,4为D:,8为e:,12为F   

		LARGE_INTEGER   DiskStartingOffset   =   DiskPartInfo.StartingOffset;   
		LONGLONG   DiskQuadPart   =   DiskStartingOffset.QuadPart; //取上面的值之一情形,支持64位整型   
		LARGE_INTEGER   DiskPartitionLength   =   DiskPartInfo.PartitionLength;   
		LONGLONG   DiskQuadPart1   =   DiskPartitionLength.QuadPart; //取上面的值之一情形,支持64位整型   
		DWORD   DiskHiddenSectors   =   DiskPartInfo.HiddenSectors;   
		DWORD   DiskPartitionNumber   =   DiskPartInfo.PartitionNumber;   
		BYTE     DiskPartitionType   =   DiskPartInfo.PartitionType;   
		BOOLEAN   DiskBootIndicator   =   DiskPartInfo.BootIndicator;   
		BOOLEAN   DiskRecognizedPartition   =   DiskPartInfo.RecognizedPartition;   
		BOOLEAN   DiskRewritePartition   =   DiskPartInfo.RewritePartition;   
		if     ((DiskQuadPart==QuadPart)   &&   (DiskQuadPart1==QuadPart1)   
			&&   (DiskHiddenSectors==HiddenSectors)   &&   (DiskPartitionNumber==PartitionNumber)   
			&&   (DiskPartitionType==PartitionType   )   &&   (DiskBootIndicator==BootIndicator)   
			&&   (DiskRecognizedPartition==RecognizedPartition)   &&   (DiskRewritePartition==RewritePartition))   
		{   
			free(lpDiskPartInfo);   
			CloseHandle(hDevice);   
			//::MessageBox(NULL,_T("属于本地驱动器!"),_T("提示"),MB_OK);   
			return   TRUE;   
		}   
	}   
	free(lpDiskPartInfo);   
	CloseHandle(hDevice);   
	//::MessageBox(NULL,_T("非本地驱动器!"),_T("提示"),MB_OK);//改为return   IDCANCEL;   
	return   FALSE;
}