For PocketPC 2000, you could use Embedded Visual Tools 3.0
(eVT 3.0
) but install the PocketPC 2000 SDK instead of HPC2000
Here's a link on how to set that up in a Virtual Machine running 2000 or XP
(I don't recommend using Vista, 7, 8, 10, or 11-you may run into problems
)
https://www.hpcfactor.com/support/cesd/200225/how_to_setup_a_windows...
I don't know much about developing but you could also try the other programs you mentioned, Java, C, PocketC, and Basic
Try looking through here to get an idea
https://www.hpcfactor.com/scl/categories.asp?catID=44
They don't directly apply to PocketPC, so the screen size may be an issue but it's a good place to start?
Hope this helps a little