获取盘符所在的物理磁盘号和分区号

转载的 ，出处忘记了，不好意思

#include "stdafx.h"
#include <windows.h>
#include <iostream>
using namespace std;


typedef struct _VOLUME_INFO
{
TCHAR chFlag;
DWORD    dwDiskNumber;
DWORD    dwPartitionNumber;
}VOLUME_INFO, *PVOLUME_INFO;


BOOL GetVolumeInfo(IN TCHAR chFlag, OUT PVOLUME_INFO pVolumeInfo)
{
pVolumeInfo->chFlag = chFlag;                            //分区盘符
char szVol[] = { '\\', '\\', '.', '\\', chFlag, ':', 0};

HANDLE hDrv = CreateFile(
szVol, 
GENERIC_READ, 
FILE_SHARE_READ | FILE_SHARE_WRITE, 
NULL, 
OPEN_EXISTING, 
0, 
NULL);
if (INVALID_HANDLE_VALUE == hDrv)
{
return FALSE;
}


VOLUME_DISK_EXTENTS vde = {0};
DWORD dwBytes = 0;
BOOL bRet = DeviceIoControl(
hDrv, 
IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS, 
NULL, 
0,
&vde, 
sizeof(vde), 
&dwBytes, 
NULL);
if (!bRet)
{
CloseHandle(hDrv);
return FALSE;
}

pVolumeInfo->dwDiskNumber = vde.Extents->DiskNumber;    //分区所在硬盘编号,基于0


dwBytes = 0;
PARTITION_INFORMATION pinfo = {0}; 
bRet = DeviceIoControl(  
(HANDLE) hDrv,                 
IOCTL_DISK_GET_PARTITION_INFO,   
NULL,                              
0,                                
&pinfo,              
sizeof(pinfo),          
&dwBytes,         
NULL       
); 


if (!bRet)
{
CloseHandle(hDrv);
return FALSE;
}


pVolumeInfo->dwPartitionNumber = pinfo.PartitionNumber;


CloseHandle(hDrv);  
return TRUE;
}


int _tmain(int argc, _TCHAR* argv[])
{
char chFlag = 'C';
VOLUME_INFO pi = {0};
GetVolumeInfo(chFlag, &pi);


printf("DiskNumber is %d, PartitionNumber is %d\n",pi.dwDiskNumber,pi.dwPartitionNumber);
return 0;
}