HIDP_CAPS - NtDoc

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

typedef struct _HIDP_CAPS {
  USAGE  Usage;
  USAGE  UsagePage;
  USHORT InputReportByteLength;
  USHORT OutputReportByteLength;
  USHORT FeatureReportByteLength;
  USHORT Reserved[17];
  USHORT NumberLinkCollectionNodes;
  USHORT NumberInputButtonCaps;
  USHORT NumberInputValueCaps;
  USHORT NumberInputDataIndices;
  USHORT NumberOutputButtonCaps;
  USHORT NumberOutputValueCaps;
  USHORT NumberOutputDataIndices;
  USHORT NumberFeatureButtonCaps;
  USHORT NumberFeatureValueCaps;
  USHORT NumberFeatureDataIndices;
} HIDP_CAPS, *PHIDP_CAPS;
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (ns-hidpi-_hidp_caps)

_HIDP_CAPS structure

Description

The HIDP_CAPS structure contains information about a top-level collection's capability.

Members

Usage

Specifies a top-level collection's usage ID.

UsagePage

Specifies the top-level collection's usage page.

InputReportByteLength

Specifies the maximum size, in bytes, of all the input reports. Includes the report ID, which is prepended to the report data. If report ID is not used, the ID value is zero.

OutputReportByteLength

Specifies the maximum size, in bytes, of all the output reports. Includes the report ID, which is prepended to the report data. If report ID is not used, the ID value is zero.

FeatureReportByteLength

Specifies the maximum length, in bytes, of all the feature reports. Includes the report ID, which is prepended to the report data. If report ID is not used, the ID value is zero.

Reserved

Reserved for internal system use.

NumberLinkCollectionNodes

Specifies the number of HIDP_LINK_COLLECTION_NODE structures that are returned for this top-level collection by HidP_GetLinkCollectionNodes.

NumberInputButtonCaps

Specifies the number of input HIDP_BUTTON_CAPS structures that HidP_GetButtonCaps returns.

NumberInputValueCaps

Specifies the number of input HIDP_VALUE_CAPS structures that HidP_GetValueCaps returns.

NumberInputDataIndices

Specifies the number of data indices assigned to buttons and values in all input reports.

NumberOutputButtonCaps

Specifies the number of output HIDP_BUTTON_CAPS structures that HidP_GetButtonCaps returns.

NumberOutputValueCaps

Specifies the number of output HIDP_VALUE_CAPS structures that HidP_GetValueCaps returns.

NumberOutputDataIndices

Specifies the number of data indices assigned to buttons and values in all output reports.

NumberFeatureButtonCaps

Specifies the total number of feature HIDP_BUTTONS_CAPS structures that HidP_GetButtonCaps returns.

NumberFeatureValueCaps

Specifies the total number of feature HIDP_VALUE_CAPS structures that HidP_GetValueCaps returns.

NumberFeatureDataIndices

Specifies the number of data indices assigned to buttons and values in all feature reports.

Remarks

Callers of the HIDClass support routines use the information provided in this structure when a called routine requires, as input, the size of a report type, the number of link collection nodes, the number of control capabilities, or the number of data indices.

See also

View the official Windows Driver Kit DDI reference

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