The IOCTL_HID_ACTIVATE_DEVICE request activates a HIDClass device, which makes it ready for I/O operations.

For general information about HIDClass devices, see HID Collections.

Major Code


Input Buffer

Parameters.DeviceIoControl.Type3InputBuffer contains a collection identifier, as a ULONG value, of the collection to activate.

Input Buffer Length

The length of a ULONG value.

Output Buffer


Output Buffer Length


Status Block

HID minidrivers that carry out the I/O to the device set the following fields of Irp->IoStatus:

  • Information is set to zero.
  • Status is set to STATUS_SUCCESS if the transfer completed without error. Otherwise, it is set to an appropriate NTSTATUS error code.
Minidrivers that call other drivers with this IRP to carry out the I/O to their device should ensure that the Information field of the status block is zero and not change the contents of the Status field.


Header hidport.h (include Hidport.h)

See Also