Admin Production ni-theme
Current Publication

CA_ServerGetObjHandleFromIface

LabWindows/CVI

CA_ServerGetObjHandleFromIface

HRESULT CA_ServerGetObjHandleFromIface (void *thisInterfacePtr, CAServerObjHandle *serverObjectHandle);

Purpose

Gets the handle of the ActiveX object whose interface pointer is passed in the first parameter.

Parameters

Input
Name Type Description
thisInterfacePtr void * An interface pointer of your ActiveX object.
Output
Name Type Description
serverObjectHandle CAServerObjHandle The handle to the ActiveX object whose interface pointer was passed in the thisInterfacePtr parameter.

Return Value

Name Type Description
status HRESULT A value indicating whether an error occurred. Function failure is indicated by a negative error code.

Error codes are defined in CVIversion\include\cviauto.h and <Program Files>\National Instruments\Shared\MSDTRedistributables\SDKHeaderFiles\8.1\winerror.h. The LabWindows/CVI ActiveX Library explicitly returns error codes. Other error codes in winerror.h are generated by the COM runtime and passed on to you by the ActiveX Library.

You can use CA_GetAutomationErrorString to get the description of an error code or CA_DisplayErrorInfo to display the description of the error code.

Note   You should not return the ActiveX Library error codes from your ActiveX server to your ActiveX clients, unless you document them in your server documentation. An acceptable compromise in this case is to return E_UNEXPECTED to the clients.

The error codes defined in <Program Files>\National Instruments\Shared\MSDTRedistributables\SDKHeaderFiles\8.1\winerror.h are too numerous to display here. These error codes can be returned to your ActiveX clients.

Additional Information

Library: ActiveX Library

Include file: cviauto.h

LabWindows/CVI compatibility: LabWindows/CVI 6.0 and later