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.


Requirement Value
Header hidport.h (include Hidport.h)

See also