FSCTL_QUERY_REGION_INFO IOCTL (winioctl.h)

Retrieves the storage tier regions defined for a volume that supports data tiering.

To perform this operation, call the DeviceIoControl function with the following parameters.

BOOL DeviceIoControl(
  (HANDLE) hDevice,             // handle to device
  FSCTL_QUERY_REGION_INFO,      // dwIoControlCode
  (LPDWORD) lpInBuffer,         // input buffer
  (DWORD) nInBufferSize,        // size of input buffer
  (LPDWORD) lpOutBuffer,        // output buffer
  (DWORD) nOutBufferSize,       // size of output buffer
  (LPDWORD) lpBytesReturned,    // number of bytes returned
  (LPOVERLAPPED) lpOverlapped   // OVERLAPPED structure
);

Requirements

Requirement	Value
Minimum supported client	None supported
Minimum supported server	Windows Server 2012 R2
Header	winioctl.h

See also

• DeviceIoControl