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CA_ServerDestroyActiveObject

LabWindows/CVI

CA_ServerDestroyActiveObject

HRESULT CA_ServerDestroyActiveObject (CAServerObjHandle serverObjectHandle);

Purpose

Destroys the ActiveX object whose handle is passed in the first parameter, without regard to any of its references held by ActiveX clients.

Call CA_ServerDestroyActiveObject when you need to destroy an ActiveX object, which was previously locked when it was made visible, as a result of an interactive user command.

Note   Do not call this function to destroy other kinds of ActiveX objects. The lifetime of an ActiveX object is normally determined by references to it held by ActiveX clients.

Parameters

Input
Name Type Description
serverObjectHandle CAServerObjHandle The handle to an ActiveX object in your ActiveX server.

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