OpenObject
Function
The function OpenObject opens an object for the user process. Each change of a value or status of opened object will be sent by the D2000 Server process to the user process, which can process the value using the function NewValueProc.
Declaration
APIRET OpenObject(const char *name, BasObjInfoPtr data)Parameters
The parameter name defines the name of opened object and the structure data will contain returned information on the opened object. The item data.Id defines a unique object identifier, which can be used later in the function NewValueProc to detect the object name and in the function CloseObject used to close defined object.
Return code
Code | Description |
|---|---|
API_OK | Object opened correctly. |
API_ObjNotExist | Required object doesn't exist. |
API_TimeoutError | Object was not opened in the given time. |
API_ParamError | The value of the parameter data is null. |
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