Protect a Xojo Windows app with QLM

QLM can protect a Xojo Windows app.

A Xojo sample can be found in the following folder:

C:\Users\Public\Documents\Quick License Manager\Samples\qlmpro\Windows\Xojo

We highly recommend that you familiarize yourself with the sample before protecting your own application.

To protect your Xojo Windows application with QLM:

• Copy the LicenseValidator class from the Xojo sample to your Xojo app

• Copy the following files from C:\Users\Public\Documents\Quick License Manager\Samples\qlmpro\Windows\Xojo folder to your Xojo project.

  • QlmLicenseLib.dll

  • QlmWrapper.dll

  • QlmLicenseWizard.exe

  • register.bat

• Open a command prompt as Administrator (Run As Administrator) and execute register.bat. Make sure the registration is successful before proceeding.

• In the Xojo IDE, click Insert / Active X Component, go to the References tab, locate QlmWrapper.dll, select it and click Ok.

• Locate the InitializeLicense method of the LicenseValidator class and update the following to to match your own product:

  • Update all arguments of the call to DefineProduct

  • Update the PublicKey

  • Update the DefaultWebServiceUrl

  • Update the CommunicationEncryptionKey

• When your app starts up, call the ValidateLicenseAtSartup method of the LicenseValidator class.

• If ValidateLicenseAtStartup fails, launch the QLM License Wizard process to prompt the user to enter his Activation Key.

• Right after the QLM License Wizard process returns, call ValidateLicenseAtSartup again. If the call fails, exit your application. If the call succeeds, proceed to launch your application.