# DefineProduct

### Description

The DefineProduct method initializes basic information required to validate license keys. You must call this function prior to calling any other function.

```csharp
bool DefineProduct ( int ProductID, string ProductName, 
                    int MajorVersion, int MinorVersion, 
                    string EncryptionKey, string PersistenceKey )
```

### Arguments

| Name           | Data Type | Description                                                                                                                                                                                                     |
| -------------- | :-------: | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| ProductID      |    int    | ID of the product as generated by Quick License Manager                                                                                                                                                         |
| ProductName    |   string  | Name of the product                                                                                                                                                                                             |
| MajorVersion   |    int    | Major version of the product (maximum 2 digits)                                                                                                                                                                 |
| MinorVersion   |    int    | Minor version of the product (maximum 2 digits)                                                                                                                                                                 |
| EncryptionKey  |   string  | string used to encrypt the license key (obsolete)                                                                                                                                                               |
| PersistenceKey |   string  | GUID associated with the product and automatically generated by Quick License Manager for each product. The evaluation information of the product is stored at runtime in the registry under HKCR\CLSID\<GUID>. |

### Return

| Type | Description                          |
| ---- | ------------------------------------ |
| bool | true if successful; otherwise false. |