Set license to avoid demo message

private const string MyLicenseXML = "Put your license from us here";

public void SetLicenseInformation()
{
    TreeksLicensingLibrary.DeveloperLicense.LicenseXML = MyLicenseXML;
}

Private Const MyLicenseXML As String = "Put your license from us here"

Public Sub SetLicenseInformation()
    TreeksLicensingLibrary.DeveloperLicense.LicenseXML = MyLicenseXML
End Sub

You can use TreeksLicensingLibrary.DeveloperLicense.ValidateDeveloperLicense function to check if your input was correct. Library toolbox can be used to check TLL license also.