This sample shows how to access the Windows registry using the native Visual FoxPro DECLARE-DLL command. The Windows API provides a number of functions you can use to access, read and write to the registry. The Registry.prg class library in ...\Samples\Classes contains a complete set of these functions you can use in your applications.
In this specific sample, you can use registry functions to check for the existence of a particular application. For example, you might want to distribute an application, which relies on using Excel to automate the creation of a Pivot Table. The registry contains the location, version, and other information about a particular application.