CNVGetScalarDataValue
int CNVGetScalarDataValue (CNVData data, CNVDataType type, void *value);
Purpose
Gets the value of scalar data.
Parameters
| Input | ||
| Name | Type | Description |
| data | CNVData | The handle that identifies the network variable data. |
| type | CNVDataType | The type of the specified network variable data. Note that CNVBool refers to a 1-byte boolean type (char or unsigned char), and CNVString refers to a C-style NUL-terminated string. |
| Output | ||
| Name | Type | Description |
| value | void * | The value of the network variable data. The Network Variable Library allocates returned strings. You must free these strings using CNVFreeMemory. |
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 CNVGetScalarDataValue function:
- apps\chess\chess.cws
Open example - networkvariable\3DSim\NV3DSim.cws
Open example - networkvariable\Polling\NVPolling.cws
Open example