Validates a license
bool ValidateLicenseAtStartup(string computerID, ref bool needsActivation, ref string returnMsg)
|computerID||string||the unique identifier of the computer|
|needsActivation||bool||returned flag indicating whether the license needs to be activated|
|returnMsg||string||message returned by the license validation operation|
|bool||true if the license is valid; false otherwise|
This function is typically called when your application starts up. It looks for an Activation Key and a Computer Key on the user system. If found, it validates the license and returns the result of the validation.
The validation is a two-step process: client-side validation and server-side validation (optional).
First, the license is validated locally without contacting the server. If the license validation fails because it has expired or the version is wrong, and if server-side validation is enabled, ValidateLicenseAtStartup contacts the server and determine whether the expiry date was extended or whether the user has a maintenance plan that entitles use of the installed version of the product.
If the local license validation succeeds, and if server-side validation is enabled, ValidateLicenseAtStartup contacts the server and perform 2 sets of operations:
- Determines if the license is valid on the server by checking if:
- the license is found on the server
- the license was not revoked on the server
- the current computer is not detected as illegal
- the client system date is identical to the server's system date, within a specified threshold
- Determines if there were changes to the license on the server-side that need to be applies to the client:
- the license expiry date was updated on the server
- the features associated with the license were updated on the server
- the number of seats associated with the license were updated on the server
If the server-side validation fails, ValidateLicenseAtStartup returns false and sets the property ServerErrorCode.