LabWindows/CVI

Table of Contents
  • LabWindows/CVI Fundamentals
  • Creating Applications
  • Distributing Applications
  • Library Reference
  • Programmer Reference
  • Hardware Information

CA_VariantIUnknown

VARIANT CA_VariantIUnknown (LPUNKNOWN IUnknownValue);

Purpose

Converts an LPUNKNOWN value to a variant that contains the LPUNKNOWN value.

Use CA_VariantIUnknown to pass an LPUNKNOWN value as a variant parameter.

Note    The value stored in the variant parameter is a reference to the original value. Call CA_VariantClear to free the original value.

Parameters

Input
Name Type Description
IUnknownValue LPUNKNOWN Value to store in the variant.

Return Value

Name Type Description
variant VARIANT Variant that contains the value in IUnknownValue.

Additional Information

Library: ActiveX Library

Include file: cviauto.h

LabWindows/CVI compatibility: LabWindows/CVI 5.0 and later

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