Deprecation for Windows Server 2003 and XP

Targets Windows
1

I have a Console application that is required to run on Windows Server 32 2003 Service Pack 2 (Build 3790) and Windows XP Professional x64 Edition Service Pack 2 (Build 3790). According to the Xojo web site (http://developer.xojo.com/deprecations) I need to compile the Windows XP SP2 with Xojo 2013r4.1.

But I have two questions:

  1. What is the latest Xojo version needed to compile for Windows Server 2003 SP2?
  2. Why is it that Windows XP can use a later version of Xojo (2015r2.4) than Windows XP SP2 (2013r4.1)?
2

With 2015r2.4 the IDE does not run on Windows XP, but the built app does run there.
Which simply means the IDE uses declares which are not available on Windows XP.

If I am correct Windows Server 2013 is the server version of Windows XP, you the same restrictions may apply.