The IOCTL_HID_GET_POLL_FREQUENCY_MSEC request obtains the current polling frequency, in milliseconds, of a top-level collection.
For general information about HIDClass devices, see HID Collections.
Parameters.DeviceIoControl.OutputBufferLength in the I/O stack location of the IRP indicates the size, in bytes, of the output buffer, which must be >= sizeof(ULONG).
Input Buffer Length
Greater than or equal to sizeof(ULONG).
Irp->AssociatedIrp.SystemBuffer points to a buffer that will receive the polling frequency.
The HID class driver sets the following fields of Irp->IoStatus:
- Information is set to sizeof(ULONG) if the polling frequency is successfully retrieved.
- Status is set to STATUS_SUCCESS if the transfer completed without error. Otherwise, it is set to an appropriate NTSTATUS error code.
|Header||hidclass.h (include Hidclass.h)|