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//以下代码来自网上,需DDK、SDK支持




#include <windows.h>
#include <Setupapi.h>
#include <winioctl.h>
#include <cfgmgr32.h>
#include <regstr.h>  
#include <initguid.h>  
#include <stdio.h>
extern   "C"   
{    
 #include   "hidsdi.h"    
}  
DEFINE_GUID(GUID_DEVINTERFACE_DISK,                   0x53f56307L, 0xb6bf, 0x11d0, 0x94, 0xf2, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
DEFINE_GUID(GUID_DEVINTERFACE_CDROM,                  0x53f56308L, 0xb6bf, 0x11d0, 0x94, 0xf2, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
//-------------------------------------------------
DEVINST GetDrivesDevInstByDiskNumber(long DiskNumber, UINT DriveType);
//-------------------------------------------------
//-------------------------------------------------
int main(int argc, char* argv[])
{
 if ( argc != 2 ) {
  return 1;
 }
 
 //printf("in \n\n");
 
 char DriveLetter = argv[1][0];
 DriveLetter &= ~0x20; // uppercase
 
 if ( DriveLetter < 'A' || DriveLetter > 'Z' )
 {
  return 1;
 }
 
 char szRootPath[] = "X:\\";   // "X:\"
 szRootPath[0] = DriveLetter;
 
 char szVolumeAccessPath[] = "
\\\\.\\X:";   // "\\.\X:"
 szVolumeAccessPath[4] = DriveLetter;
 
 long DiskNumber = -1;
 
 HANDLE hVolume = CreateFile(szVolumeAccessPath, 0, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, NULL, NULL);
 if (hVolume == INVALID_HANDLE_VALUE) {
  return 1;
 }
 
 STORAGE_DEVICE_NUMBER sdn;
 DWORD dwBytesReturned = 0;
 long res = DeviceIoControl(hVolume, IOCTL_STORAGE_GET_DEVICE_NUMBER, NULL, 0, &sdn, sizeof(sdn), &dwBytesReturned, NULL);
 if ( res ) {
  DiskNumber = sdn.DeviceNumber;
 }
 CloseHandle(hVolume);
 
 if ( DiskNumber == -1 ) {
  return 1;
 }
 
 UINT DriveType = GetDriveType(szRootPath);
 
 DEVINST DevInst = GetDrivesDevInstByDiskNumber(DiskNumber, DriveType);
 
 if ( DevInst == 0 ) {
  return 1;
 }
 
 ULONG Status = 0;
 ULONG ProblemNumber = 0;
 PNP_VETO_TYPE VetoType = PNP_VetoTypeUnknown;
 WCHAR VetoNameW[MAX_PATH];
 bool bSuccess = false;
 
 res = CM_Get_Parent(&DevInst, DevInst, 0);  // disk's parent, e.g. the USB bridge, the SATA port....
 res = CM_Get_DevNode_Status(&Status, &ProblemNumber, DevInst, 0);
 bool IsRemovable = ((Status & DN_REMOVABLE) != 0);
 
 
 for ( long tries=1; tries<=3; tries++ ) { // sometimes we need some tries...
  VetoNameW[0] = 0;
  if ( IsRemovable ) {
   res = CM_Request_Device_EjectW(DevInst, &VetoType, VetoNameW, sizeof(VetoNameW), 0);
   //res = CM_Request_Device_EjectW(DevInst, &VetoType, NULL, 0, 0);  // with MessageBox or 'bubble'
  } else {
   res = CM_Query_And_Remove_SubTreeW(DevInst, &VetoType, VetoNameW, sizeof(VetoNameW), 0); // CM_Query_And_Remove_SubTreeA is not implemented under W2K!
  }
  bSuccess = (res==CR_SUCCESS && VetoType==PNP_VetoTypeUnknown);
  if ( bSuccess )  {
   break;
  } else {
   Sleep(200); // required to give the next tries a chance!
  }
 }
 
 if ( bSuccess ) {
  printf("Success\n\n");
  return 0;
 }
 
 printf("failed\n");
 
 printf("Result=0x%2X\n", res);
 
 if ( VetoNameW[0] ) {
  printf("VetoName=%ws)\n\n", VetoNameW);
 }
 return 1;
}
//-----------------------------------------------------------
 

//-----------------------------------------------------------
DEVINST GetDrivesDevInstByDiskNumber(long DiskNumber, UINT DriveType) {
 
 GUID* guid;
 
 switch (DriveType) {
 case DRIVE_REMOVABLE:
  //break;
 case DRIVE_FIXED:
  guid = (GUID*)(void*)&GUID_DEVINTERFACE_DISK;
  break;
 case DRIVE_CDROM:
  guid = (GUID*)(void*)&GUID_DEVINTERFACE_CDROM;
  break;
 default:
  return 0;
 }
 
 // Get device interface info set handle for all devices attached to system
 HDEVINFO hDevInfo = SetupDiGetClassDevs(guid, NULL, NULL, DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);
 
 if (hDevInfo == INVALID_HANDLE_VALUE){
  return 0;
 }
 
 // Retrieve a context structure for a device interface of a device
 // information set.
 DWORD dwIndex = 0;
 SP_DEVICE_INTERFACE_DATA devInterfaceData = {0};
 devInterfaceData.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);
 BOOL bRet = FALSE;
 
 BYTE Buf[1024];
 PSP_DEVICE_INTERFACE_DETAIL_DATA pspdidd = (PSP_DEVICE_INTERFACE_DETAIL_DATA)Buf;
 SP_DEVICE_INTERFACE_DATA         spdid;
 SP_DEVINFO_DATA                  spdd;
 DWORD                            dwSize;
 
 spdid.cbSize = sizeof(spdid);
 
 while ( true ){
  bRet = SetupDiEnumDeviceInterfaces(hDevInfo, NULL, guid, dwIndex, &devInterfaceData);
  if (!bRet) {
   break;
  }
  
  SetupDiEnumInterfaceDevice(hDevInfo, NULL, guid, dwIndex, &spdid);
  
  dwSize = 0;
  SetupDiGetDeviceInterfaceDetail(hDevInfo, &spdid, NULL, 0, &dwSize, NULL);
  
  if ( dwSize!=0 && dwSize<=sizeof(Buf) ) {
   //pspdidd = (PSP_DEVICE_INTERFACE_DETAIL_DATA)HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, dwSize);
   //if ( pspdidd == NULL ) {
   //return 0; // damn
   //}
   pspdidd->cbSize = sizeof(*pspdidd); // 5 Bytes!
   
   ZeroMemory((PVOID)&spdd, sizeof(spdd));
   spdd.cbSize = sizeof(spdd);
   
   long res = SetupDiGetDeviceInterfaceDetail(hDevInfo, &spdid, pspdidd, dwSize, &dwSize, &spdd);
   if ( res ) {
    
    // the device instance id string contains the serial number if the
    // device has one...
    // char szDevInstId[260] = {0};
    // SetupDiGetDeviceInstanceId(hDevInfo, &spdd, szDevInstId, 260, NULL);
    // printf("DevInstId=%s\n", szDevInstId);
    
    HANDLE hDrive = CreateFile(pspdidd->DevicePath, 0, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, NULL, NULL);
    if ( hDrive != INVALID_HANDLE_VALUE ) {
     STORAGE_DEVICE_NUMBER sdn;
     DWORD dwBytesReturned = 0;
     res = DeviceIoControl(hDrive, IOCTL_STORAGE_GET_DEVICE_NUMBER, NULL, 0, &sdn, sizeof(sdn), &dwBytesReturned, NULL);
     if ( res ) {
      if ( DiskNumber == (long)sdn.DeviceNumber ) {
       CloseHandle(hDrive);
       //HeapFree(GetProcessHeap(), 0, pspdidd);
       SetupDiDestroyDeviceInfoList(hDevInfo);
       return spdd.DevInst;
      }
     }
     CloseHandle(hDrive);
    }
   }
   //HeapFree(GetProcessHeap(), 0, pspdidd);
  }
  dwIndex++;
 }
 
 SetupDiDestroyDeviceInfoList(hDevInfo);
 
 return 0;
}

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