> ## Documentation Index
> Fetch the complete documentation index at: https://notevil.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# CAPLfunctionIso11783ILOPLock

[Open topic with navigation](../../../../../../CANoeDEFamily.htm#Topics/CAPLFunctions/ISO11783/ISOInteractionLayer/Functions/CAPLfunctionIso11783ILOPLock.md)

[CAPL Functions](../../../CAPLfunctions.md) » [ISO11783](../../CAPLfunctionsISO11783Overview.md) » [ISO11783 Interaction Layer](../CAPLfunctionsISOILOverview.md) » Iso11783IL\_OPLock

# Iso11783IL\_OPLock

[Valid for](../../../../Shared/FeatureAvailability.md):  CANoe DE • CANoe4SW DE

## Function Syntax

* `long Iso11783IL_OPLock( dword lock, dword maskID, dword timeout ); // form 1`
* `long Iso11783IL_OPLock( dbNode implement, dword lock, dword maskID, dword timeout ); // form 2`

## Description

The function locks the screen updates on the Virtual Terminal. A **Lock** command is sent to the Virtual Terminal.

## Parameters

* **lock**
  * 0: unlock
  * 1: lock
* **maskID**
  * object ID of the data mask object
* **timeout**
  * timeout in \[ms]
* **implement**
  * Simulation node to apply the function.

## Return Values

* **0**
  * function has been executed successfully
* **\< 0**
  * an error has occurred, see [error codes](../../../CAPLfunctionsISOj1939ErrorCodes.md)

## Example

```plaintext theme={null}
Iso11783IL_OPLock( 1200, 1, 500 );
```