The RegisterControls module is used by all custom controls to handle the registration code.
Xojo 2014r3 introduced some new features that now need a stricter definition of Constant values. Therefore, it is necessary to update the RegisterControls Module when using Xojo 2014r3.
Download the Update
The updated RegisterControls module is available here: http://www.jeremieleroy.com/download.php?item=RegisterControls
As soon as the file is downloaded, unzip the archive to get the RegisterControls.xojo_binary_code file.
Installing the Update
Search for RegisterControls in the Xojo Navigator
Click the file and select Delete
Now in the menu click on File->Import.
Locate the RegisterControls.xojo_binary_code you downloaded and extracted from the Zip archive, and click Import
The module is updated, you can now compile your Xojo project.