# Customer

| Extension                                                                                                                                                       | Description                                                                                       |
| --------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------- |
| [EXT\_Customer\_Record](https://doc.sysdevmobile.com/mss-extensibility/mss-5.1/functions-kalipso-to-mss/customer/ext_customer_record)                           | Function to ask MSS to open MSS customer record screen.                                           |
| [EXT\_Customer\_Select](https://doc.sysdevmobile.com/mss-extensibility/mss-5.1/functions-kalipso-to-mss/customer/ext_customer_select)                           | Function to ask MSS to open the customer selection screen.                                        |
| [EXT\_Customer\_SelectContact](https://doc.sysdevmobile.com/mss-extensibility/mss-5.1/functions-kalipso-to-mss/customer/ext_customer_selectcontact)             | Function to ask MSS to open the MSS screen to select a customer contact.                          |
| [EXT\_Customer\_SelectDeliveryPlace](https://doc.sysdevmobile.com/mss-extensibility/mss-5.1/functions-kalipso-to-mss/customer/ext_customer_selectdeliveryplace) | Function to ask MSS to open the MSS screen to select a customer delivery place.                   |
| [EXT\_Customer\_ValidateNIF](https://doc.sysdevmobile.com/mss-extensibility/mss-5.1/functions-kalipso-to-mss/customer/ext_customer_validatenif)                 | Function to ask MSS to validate a customer fiscal number (only valid for Portugal fiscal numbers) |
| [EXT\_Customer\_New](https://doc.sysdevmobile.com/mss-extensibility/mss-5.1/functions-kalipso-to-mss/customer/ext_customer_new)                                 | Function to create a new customer                                                                 |
| [EXT\_Customer\_Edit](https://doc.sysdevmobile.com/mss-extensibility/mss-5.1/functions-kalipso-to-mss/customer/ext_customer_edit)                               | Function to edit a customer record                                                                |