There is no single right answer. If you mean full support for remote debug,
native code, etc., no, only for 5.0 and a couple of special cases of 4.2,
Pocket PC/Smart Phone 2003. Nothing for 3.0 at all. .NET Compact Framework
isn't supported on 3.0.
You could use VS2005 to build managed code applications targeting .NET CF
1.0 and they would run on CE 4.2 devices. You won't find a Windows CE 4.2
item in the target list in the New Project Wizard, though.
Paul T.