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PdhVbOpenQuery function

The PdhVbOpenQuery function creates and initializes a unique query structure that is used to manage the collection of performance data.

Function PdhVbOpenQuery( _ ByVal QueryHandle As Long _ ) As Long

Parameters

QueryHandle

Variable that is cleared (equals 0) before the function is called and, if the function is successful, contains the unique ID of the query that is created and opened. This handle is used in the subsequent calls to other PDH functions to identify the query.

Return value

If the function succeeds, it returns a Long integer equal to ERROR_SUCCESS and a new handle in the QueryHandle variable.

If the function fails, the return value is a system error code or a PDH error code. The following are possible values.

Return codeDescription
PDH_INVALID_ARGUMENT

The argument is invalid or incorrect.

PDH_MEMORY_ALLOCATION_FAILURE

A temporary memory buffer could not be allocated.

 

Requirements

Minimum supported client

Windows XP [desktop apps only]

Minimum supported server

Windows Server 2003 [desktop apps only]

Library

Pdh.lib

DLL

Pdh.dll

See also

PdhCloseQuery

 

 

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