CNVVariableExists
int CNVVariableExists (const char *parentPath, const char *variableName, int *exists);
Purpose
Indicates whether a particular variable is present in the network variable path you specify.
Parameters
| Input | ||||
| Name | Type | Description | ||
| parentPath | const char * | The parent's machine-relative path. You can specify a process name or a process name followed by one or more folder names delimited with the backslash path separator. Do not include a trailing backslash in the path.
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| variableName | const char * | The name of the network variable.
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| Output | ||||
| Name | Type | Description | ||
| exists | int | Returns whether the variable name exists in the network variable path. A non-zero value indicates that the variable name exists in the network variable path; zero indicates that the variable name does not exist. | ||
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 8.5 and later
Example
Refer to networkvariable\Configurator\configurator.cws for an example of using the CNVVariableExists function.