FormatFromRawValue function

Article
09/15/2021

Converts one raw performance data value to the specified format, or two raw performance data values if the format conversion is time-based.

Note

This API is for internal use only. It's not intended for use from developer code.

Syntax

int FormatFromRawValue (
   [in] uint                    dwCounterType,
   [in] uint                    dwFormat,
   [in] long*                   pTimeBase,
   [in] PDH_RAW_COUNTER*        pRawValue1,
   [in] PDH_RAW_COUNTER*        pRawValue2,
   [out] PDH_FMT_COUNTERVALUE*  pFmtValue
);

Parameters

dwCounterType
[in] The counter type. For a list of counter types, see WMI Performance Counter Types. dwCounterType can be any counter type except for PERF_LARGE_RAW_FRACTION and PERF_LARGE_RAW_BASE.

dwFormat
[in] The format to which to convert the raw performance data. It can be one of the following values:

Constant	Value	Description
`PDH_FMT_DOUBLE`	0x00000200	Return the calculated value as a double-precision floating point value.
`PDH_FMT_LARGE`	0x00000400	Return the calculated value as a 64-bit integer.
`PDH_FMT_LONG`	0x00000100	Return the calculated value as a 32-bit integer.

One of the previous values can be ORed with one of the following scaling flags:

Constant	Value	Description
`PDH_FMT_NOSCALE`	0x00001000	Do not apply the counter's scaling factors.
`PDH_FMT_1000`	0x00002000	Multiply the final value by 1,000.

pTimeBase
[in] A pointer to the time base, if necessary for the format conversion. If time base information is not necessary for the format conversion, the value of this parameter is ignored.

pRawValue1
[in] A pointer to a PDH_RAW_COUNTER structure that represents a raw performance value.

pRawValue2
[in] A pointer to a PDH_RAW_COUNTER structure that represents a second raw performance value. If a second raw performance value is not necessary, this parameter should be null.

pFmtValue
[out] A pointer to a PDH_FMT_COUNTERVALUE structure that receives the formatted performance value.

Return value

The following values are returned by this function:

Constant	Value	Description
`ERROR_SUCCESS`	0	The function call is successful.
`PDH_INVALID_ARGUMENT`	0xC0000BBD	A required argument is missing or incorrect.
`PDH_INVALID_HANDLE`	0xC0000BBC	The handle is not a valid PDH object.

Remarks

This function wraps a call to the FormatFromRawValue function.

Requirements

Platforms: See System Requirements.

Library: PerfCounter.dll

.NET Framework Versions: Available since 4.7.2

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