Note
Access to this page requires authorization. You can try signing in or changing directories.
Access to this page requires authorization. You can try changing directories.
This function returns the signed and scaled result of a HID control value extracted from a HID report.
NTSTATUS HidP_GetScaledUsageValue( HIDP_REPORT_TYPE ReportType, USAGE UsagePage, USHORT LinkCollection, USAGE Usage, PLONG UsageValue, PHIDP_PREPARSED_DATA PreparsedData, PCHAR Report, ULONG ReportLength);
Parameters
- ReportType
[in] HIDP_REPORT_TYPE enumerator value that identifies the type of HID report that contains the HID usage value. - UsagePage
[in] Usage page of the value to extract. - LinkCollection
[in] Optional. Link collection identifier of the value to extract. A LinkCollection value of zero identifies the top-level collection. - Usage
[in] Usage of the value to extract. - UsageValue
[out] Pointer to the buffer in which the function returns the signed and scaled value. - PreparsedData
[in] Pointer to the preparsed data of the top-level collection that generated the report located at Report. - Report
[in] Pointer to the report that contains the usage. - ReportLength
[in] Length, in bytes, of the report located at Report.
Return Values
The following table shows the possible return values.
| Value | Description |
|---|---|
| HIDP_STATUS_SUCCESS | Function successfully returned the value. |
| HIDP_STATUS_INVALID_REPORT_TYPE | Specified report type is not valid. |
| HIDP_STATUS_INVALID_REPORT_LENGTH | Specified report length is not valid. |
| HIDP_STATUS_BAD_LOG_PHY_VALUES | Collection returned an illegal logical or physical value. To extract the value returned by the collection, call HidP_GetUsageValue. |
| HIDP_STATUS_NULL | Current state of the scaled value from the collection is less than the logical minimum or is greater than the logical maximum, and the scaled value has a NULL state. |
| HIDP_STATUS_VALUE_OUT_OF_RANGE | Current state of the scaled value data from the collection is less than the logical minimum or is greater than the logical maximum. |
| HIDP_STATUS_USAGE_NOT_FOUND | Specified usage, usage page, or link collection cannot be found in any report supported by the specified top-level collection. |
| HIDP_STATUS_INCOMPATIBLE_REPORT_ID | Specified value is not contained in the specified report, but is contained in another report supported by the specified top-level collection. |
Remarks
The terms button and usage are used synonymously.
The caller-allocated buffers supplied at PreparsedData, UsageValue, and Report must be allocated from the nonpaged pool.
HID clients must use HidP_GetUsageValueArray to extract data for a usage value array.
If the function returns status HIDP_STATUS_BAD_LOG_PHY_VALUES, an application or driver can call HidP_GetUsageValue to extract the raw usage data.
Requirements
OS Versions: Windows CE .NET 4.2 and later.
Header: Hidpi.h.
Link Library: Hidparse_lib.lib.
See Also
HidP_GetUsageValue | HidP_GetUsageValueArray | HIDP_REPORT_TYPE
Send Feedback on this topic to the authors