What language does ZUN program in?

To make Touhous, what language does ZUN use?

>>8
He did use Borland C++ for the PC-98 games. For the Windows games he uses icc and MSVC as compilers and probably vim or emacs for edition as his source files are in his cygwin drive.

>>9
He's got some IDE I think, there are black boxes with syntax highlighting, and some GUI around them, there's also a small window with black background where some scrolling output shows up.