Will I try again? and also C header files.

[SeanVn]

I looked at the D programming language a few years ago and though 
it was good.  Then I ran into trouble.  The language was in a 
state of flux.  I would write code and with the next version of D 
it would no longer work.  The same thing was happening to people 
who were writing tools such as IDE's for D and I guess most of 
them just gave up.
That was then.
I hope now things have settled down. I will look at the language 
for a couple of days.  I presume I now only have to look at D2 
and Phobos and not the previous 4 way split of D1/D2/Phobos/Tango.
I have a specific engineering application I want to develop. I 
want to pick a programming language that will give me the 
cleanest and most maintainable code possible.  I want to use the 
IUP GUI library.  That is a shared library that has C headers.  I 
presume I will be able to call the dll functions easily in D2?  
Maybe I will only have to make some minimal changes to the C 
header files to get them to work with D2?