HidP_MaxUsageListLength - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// hidpi.h

ULONG HidP_MaxUsageListLength(
  [in] HIDP_REPORT_TYPE     ReportType,
  [in] USAGE                UsagePage,
  [in] PHIDP_PREPARSED_DATA PreparsedData
);
View the official Windows Driver Kit DDI reference

NtDoc

No description available.

Edit description on GitHub

Windows Driver Kit DDI reference (nf-hidpi-hidp_maxusagelistlength)

HidP_MaxUsageListLength function

Description

The HidP_MaxUsageListLength routine returns the maximum number of HID usages that HidP_GetUsages can return for a specified type of HID report and a specified top-level collection.

Parameters

ReportType [in]

Specifies a HIDP_REPORT_TYPE enumerator value that indicates the report type.

UsagePage [in]

Specifies a usage page as a search criteria. If UsagePage is zero, the routine returns the number of all the buttons in the collection.

PreparsedData [in]

Pointer to a top-level collection's preparsed data.

Return value

If successful, HidP_MaxUsageListLength returns the maximum number of HID usages that HidP_GetUsages can return for a specified type of HID report and a specified top-level collection. If the specified preparsed data or report type is not valid, the routine returns zero.

Remarks

For more information, see HID Collections.

See also

HidP_GetButtons

HidP_GetUsages

_HIDP_PREPARSED_DATA

View the official Windows Driver Kit DDI reference

Edit description on GitHub