CA_EnableEventsForServerObject
HRESULT CA_EnableEventsForServerObject (CAObjHandle serverObject, const IID *eventClassIID);
Purpose
Enables all registered callbacks in a particular event class for an ActiveX server object.
Call this function only when you pass 0 in the enableCallbacks parameter of CA_RegisterEventCallback for every callback that you register in the event class. This function has no effect if you call it for event callbacks that have already been enabled.
Parameters
| Input | ||
| Name | Type | Description |
| serverObject | CAObjHandle | The CAObjHandle of the server object for which you want to enable your event callbacks. |
| eventClassIID | const IID * | The IID that identifies the event class of the event callbacks that you want to enable. |
Return Value
| Name | Type | Description |
| status | HRESULT | A value indicating whether an error occurred. Negative error codes indicate function failure. 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 ActiveX servers and passed on to you by the LabWindows/CVI 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. |
Additional Information
Library: ActiveX Library
Include file: cviauto.h
LabWindows/CVI compatibility: LabWindows/CVI 5.5 and later