C# Signature:

    [DllImport("hid.dll", SetLastError=true)]
    [StructLayout(LayoutKind.Sequential, Pack = 1)]
    public struct HIDP_CAPS {
      [MarshalAs(UnmanagedType.U2)]
      UInt16  Usage;
      [MarshalAs(UnmanagedType.U2)]
      UInt16  UsagePage;
      [MarshalAs(UnmanagedType.U2)]
      UInt16 InputReportByteLength;
      [MarshalAs(UnmanagedType.U2)]
      UInt16 OutputReportByteLength;
      [MarshalAs(UnmanagedType.U2)]
      UInt16 FeatureReportByteLength;
      [MarshalAs(UnmanagedType.LPArray, SizeConst=17)]
      UInt16[] Reserved;
      [MarshalAs(UnmanagedType.U2)]
      UInt16 NumberLinkCollectionNodes;
      [MarshalAs(UnmanagedType.U2)]
      UInt16 NumberInputButtonCaps;
      [MarshalAs(UnmanagedType.U2)]
      UInt16 NumberInputValueCaps;
      [MarshalAs(UnmanagedType.U2)]
      UInt16 NumberInputDataIndices;
      [MarshalAs(UnmanagedType.U2)]
      UInt16 NumberOutputButtonCaps;
      [MarshalAs(UnmanagedType.U2)]
      UInt16 NumberOutputValueCaps;
      [MarshalAs(UnmanagedType.U2)]
      UInt16 NumberOutputDataIndices;
      [MarshalAs(UnmanagedType.U2)]
      UInt16 NumberFeatureButtonCaps;
      [MarshalAs(UnmanagedType.U2)]
      UInt16 NumberFeatureValueCaps;
      [MarshalAs(UnmanagedType.U2)]
      UInt16 NumberFeatureDataIndices;
    } ;

VB Signature:

Declare Function HIDP_CAPS Lib "hid.dll" (TODO) As TODO

User-Defined Types:

None.

Alternative Managed API:

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Notes:

HIDP_CAPS structure

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 (including the report ID, if report IDs are used, which is prepended to the report data).

OutputReportByteLength

Specifies the maximum size, in bytes, of all the output reports (including the report ID, if report IDs are used, which is prepended to the report data).

FeatureReportByteLength

Specifies the maximum length, in bytes, of all the feature reports (including the report ID, if report IDs are used, which is prepended to the report data).

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.

Tips & Tricks:

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Sample Code:

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