CNVGetConnectionAttribute
int CNVGetConnectionAttribute (void *handle, CNVConnectionAttribute attribute, void *value);
Purpose
Obtains the value of a connection attribute for subscriber, reader, writer, and other network variable connections.
 |
Note To avoid deadlocks, do not call this function in a network variable callback function. |
Parameters
| Input | ||
| Name | Type | Description |
| handle | void * | The handle that identifies the network variable connection. |
| attribute | CNVConnectionAttribute | The connection attribute value you want to obtain. |
| Output | ||
| Name | Type | Description |
| value | void * | The value of the specified connection attribute. The data type for this parameter depends on the data type of the attribute you specify for the attribute parameter. Pass the address of a variable of the same data type of the attribute you pass to attribute. |
Return Value
| Name | Type | Description |
| status | int | Return value indicating whether the function was successful. One indicates that a next item was found, zero indicates that a next item was not found, and a negative number indicates that an error occurred. You can call CNVGetErrorDescription to obtain a string that describes the error. |
Additional Information
Library: Network Variable Library
Include file: cvinetv.h
LabWindows/CVI compatibility: LabWindows/CVI 8.1 and later
Examples
Refer to the following examples that use the CNVGetConnectionAttribute function:
- apps\chess\chess.cws
Open example - networkvariable\3DSim\NV3DSim.cws
Open example - networkvariable\Buffering\NVBuffering.cws
Open example - networkvariable\Quality\NVQuality.cws
Open example