云烟过眼录

#include <stdlib.h>
#include <stdio.h>
#include <windows.h>
#include <Winioctl.h>
#include <iostream.h>
 
//  Required to ensure correct PhysicalDrive IOCTL structure setup
#pragma pack(1)
 
int main(int argc, char** argv)
{
 HANDLE hDrv = CreateFile("\\\\.\\C:",
     GENERIC_READ,                // Read only to the drive
     FILE_SHARE_READ | // share mode
     FILE_SHARE_WRITE, 
     NULL,             // default security attributes
     OPEN_EXISTING,    // disposition
     0,                // file attributes
     NULL);
 
 if(!hDrv)
{
  cout << "Error Can not open the Driver " << GetLastError();
  return 0;
}
 
 PARTITION_INFORMATION pinfo;
 DWORD lpBytesReturned;
 BOOL bSuccess = DeviceIoControl(
     (HANDLE) hDrv,                // handle to a partition
     IOCTL_DISK_GET_PARTITION_INFO,   // dwIoControlCode
     NULL,                            // lpInBuffer
     0,                               // nInBufferSize
     (LPVOID) &pinfo,            // output buffer
     (DWORD) sizeof(pinfo),          // size of output buffer
     (LPDWORD) &lpBytesReturned,       // number of bytes returned
     (LPOVERLAPPED) NULL      // OVERLAPPED structure
     );
 
 CloseHandle(hDrv);
 
 if(!bSuccess)
 {
  cout << "ERROR " << GetLastError();
  return 0;
}
 cout << pinfo.PartitionNumber;
 return 1;
}