这个是我在Windows Server 2003 版本的 PSDK的开发文档里找到这个函数的。
这个SDK并不只是一些lib和.h文件，还包括工作示例，这些示例演示多种关键技术，包括 Direct X、Internet 信息服务、Win
dows 安装程序和核心 SDK。
为了不误导你，你自己看吧。
The DeviceIoControl function sends a control code directly to a specified device driver, causing the corresponding device to perform the specified operation.
BOOL DeviceIoControl(
HANDLE hDevice, // handle to device of interest
DWORD dwIoControlCode, // control code of operation to perform
LPVOID lpInBuffer, // pointer to buffer to supply input data
DWORD nInBufferSize, // size of input buffer
LPVOID lpOutBuffer, // pointer to buffer to receive output data
DWORD nOutBufferSize, // size of output buffer
LPDWORD lpBytesReturned, // pointer to variable to receive output byte count
LPOVERLAPPED lpOverlapped // pointer to overlapped structure for asynchronous operation
);
Parameters
hDevice
Handle to the device that is to perform the operation. Call the CreateFile function to obtain a device handle.
dwIoControlCode
Specifies the control code for the operation. This value identifies the specific operation to be performed and the type of device on which the operation is to be performed. The following values are defined:
Value Meaning
FSCTL_DISMOUNT_VOLUME Dismounts a volume.
FSCTL_GET_COMPRESSION Obtains the compression state of a file or directory
FSCTL_LOCK_VOLUME Locks a volume.
FSCTL_READ_COMPRESSION Reserved for future use.
FSCTL_SET_COMPRESSION Sets the compression state of a file or directory.
FSCTL_UNLOCK_VOLUME Unlocks a volume.
FSCTL_WRITE_COMPRESSION Reserved for future use.
IOCTL_DISK_CHECK_VERIFY Obsolete. Use IOCTL_STORAGE_CHECK_VERIFY
IOCTL_DISK_EJECT_MEDIA Obsolete. Use IOCTL_STORAGE_EJECT_MEDIA
IOCTL_DISK_FORMAT_TRACKS Formats a contiguous set of disk tracks.
IOCTL_DISK_GET_DRIVE_GEOMETRY Obtains information on the physical disk's geometry.
IOCTL_DISK_GET_DRIVE_LAYOUT Provides information about each partition on a disk.
IOCTL_DISK_GET_MEDIA_TYPES Obsolete. Use IOCTL_STORAGE_GET_MEDIA_TYPES
IOCTL_DISK_GET_PARTITION_INFO Obtains disk partition information.
IOCTL_DISK_LOAD_MEDIA Obsolete. Use IOCTL_STORAGE_LOAD_MEDIA
IOCTL_DISK_MEDIA_REMOVAL Obsolete. Use IOCTL_STORAGE_MEDIA_REMOVAL
IOCTL_DISK_PERFORMANCE Provides disk performance information.
IOCTL_DISK_REASSIGN_BLOCKS Maps disk blocks to spare-block pool.
IOCTL_DISK_SET_DRIVE_LAYOUT Partitions a disk.
IOCTL_DISK_SET_PARTITION_INFO Sets the disk partition type.
IOCTL_DISK_VERIFY Performs logical format of a disk extent.
IOCTL_SERIAL_LSRMST_INSERT Enables or disables placement of a line and modem status data into the data stream.
IOCTL_STORAGE_CHECK_VERIFY Checks for change in a removable-media device.
IOCTL_STORAGE_EJECT_MEDIA Ejects media from a SCSI device.
IOCTL_STORAGE_GET_MEDIA_TYPES Obtains information about media support.
IOCTL_STORAGE_LOAD_MEDIA Loads media into a device.
IOCTL_STORAGE_MEDIA_REMOVAL Enables or disables the media eject mechanism.
For more detailed information on each control code, see its topic. In particular, each topic provides details on the usage of the lpInBuffer, nInBufferSize, lpOutBuffer, nOutBufferSize, and lpBytesReturned parameters.
lpInBuffer
Pointer to a buffer that contains the data required to perform the operation.
This parameter can be NULL if the dwIoControlCode parameter specifies an operation that does not require input data.
nInBufferSize
Specifies the size, in bytes, of the buffer pointed to by lpInBuffer.
lpOutBuffer
Pointer to a buffer that receives the operation's output data.
This parameter can be NULL if the dwIoControlCode parameter specifies an operation that does not produce output data.
nOutBufferSize
Specifies the size, in bytes, of the buffer pointed to by lpOutBuffer.
lpBytesReturned
Pointer to a variable that receives the size, in bytes, of the data stored into the buffer pointed to by lpOutBuffer.
If lpOverlapped is NULL, lpBytesReturned cannot be NULL. Even when an operation produces no output data, and lpOutBuffer can be NULL, the DeviceIoControl function makes use of the variable pointed to by lpBytesReturned. After such an operation, the value of the variable is without meaning.
If lpOverlapped is not NULL, lpBytesReturned can be NULL. If this is an overlapped operation, you can get the number of bytes returned by calling GetOverlappedResult. If hDevice is associated with an I/O completion port, you can get the number of bytes returned by calling GetQueuedCompletionStatus.
lpOverlapped
Pointer to an OVERLAPPED structure.
If hDevice was opened with the FILE_FLAG_OVERLAPPED flag, this parameter must point to a valid OVERLAPPED structure. In this case, DeviceIoControl is performed as an overlapped (asynchronous) operation. If the device was opened with FILE_FLAG_OVERLAPPED and lpOverlapped is NULL, the function fails in unpredictable ways.
If hDevice was opened without specifying the FILE_FLAG_OVERLAPPED flag, this parameter is ignored and the DeviceIoControl function does not return until the operation has been completed, or an error occurs.
Return Values
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error information, call GetLastError.
