>I would like to have a command button in my application to access the Address Book in Outlook Express. Is there an ActiveX control? How do I do it?
>

OE is not an automation server; if it's available, you'll need to use either MAPI or ADSI to talk to it and extract data. It does not offer an automation model like Outlook does.

If all you want to do is launch the OE Windows Address Book with the default Address Book for the user, you can launch WAB, but it is not automatable; you can run it but VFP can't control it directly. On this system (OS is on drive F:), I'd issue the following command:

"F:\Program Files\Outlook Express\wab.exe"

The path will differ from system to system; it's the command invoked by the HKEY_CLASSES_ROOT\wab_auto_file\Shell\Open\Command key. You could also just use ShellExecute() to launch the .wab file. If OE is not the default Address Book handler, the key will point to a different application, and if OE is not present, it obviously isn't available. And you can't control it programmatically by itself.