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**CAPL Functions** » [LIN](../CAPLfunctionsLINOverview.md) » LINtp\_ActivateFCTransmission

# LINtp\_ActivateFCTransmission

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

## Function Syntax

```plaintext
void LINtp_ActivateFCTransmission(long blockSize);
```

## Description

Activate the usage of FlowControl frames. These frames will be indicated in the optional callback [LINtp\_FCPreTransmit](CAPLfunctionLINtpFCPreTransmit.md) before sending.

## Parameters

* **blockSize**
  * `<0`: Stops sending FlowControl frames
  * `[0, 255]`: Sends FlowControl frames with this block size
  * Other: reserved

## Return Values

—

## Example

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