To create an actual application from your project you need to “build” it for the platform(s) on which you want it to work.
In the Build Settings at the bottom left of the project window check the desired platforms. If you leave just “This Computer” checked XOJO will build the application for the platform on which you created your project. If you check more than one platform Xojo will build a version for each checked platform.
Next click the “Build” button on the toolbar and choose a location to save the built application(s).
Congratulations! You have just made a real computer program with XOJO.
What’s next? Take a look at the Example Projects. Download any that interest you and play around with them.