# 304 - Serial Number Validation (grid only)

304 - (Store In) Serial Number Validation (grid only)

| **Event**           | **Extension action set** | **Description**                                                   |
| ------------------- | ------------------------ | ----------------------------------------------------------------- |
| [Before ](#before)  | EXT\_0304\_1\_Before     | Will be executed before barcode validation;                       |
| [Replace](#replace) | EXT\_0304\_2\_Replace    | This event is executed to replace validation of the serial number |
| [After](#after)     | EXT\_0304\_3\_After      | Will be executed after serial number validation;                  |

### Before

*Input Parameters*

* inRef – Item Code 
* inSerialNumber – Serial number;

*Output Parameters*

* outContinue – Return code:
  * 1 - Continue Validation
  * 0 – Cancel

### Replace

*Input Parameters*

* inRef – Item Code 
* inSerialNumber – Serial number;

*Output Parameters*

* outContinue – Return code:
  * 1 - Continue Validation
  * 0 – Cancel 
* outSerialNumber – Return Serial Number if the result is multi-serial numbers return serial number separated by VAR(SEP\_ACL)

### After

*Input Parameters*

* inRef – Item Code 
* inSerialNumber – Serial number;

*Output Parameters*

* outCanSave – Return code: 
  * 0 - Cancel 
  * 1 - Continue