Steps for building mod_dtcl under NT for Apache with MingW32 
(http://www.mingw.org/). 

1)  Get Apache for NT, I used version 1.3.X.  You can use the binary release 
or build it from source.  I built from source because I needed to also include
mod_ssl.  Note that I used VC++ to build Apache - they don't support MingW32 
yet AFAIK.

2) Edit the win32\makefile in the mod_dtcl source tree to reflect 
your environment, i.e. where is Tcl installed, where is Apache installed, where
are your Apache sources and object files, etc.

3)  Apply the diffs for Apache.  The diff for Apache wraps a few 
declarations and one #include directive in the os.h file that aren't needed or 
used with the MingW32 compiler.  I used GNU patch to do this with :

	patch -c -b < os.h.diff

4)  Run make.  There will be some warnings about a redefinition - 
you can ignore it. You should be left with a file called ApacheModuleDtcl.dll.
If you are using Apache 1.3.17 or newer that uses .so files for modules, you can
run 'make so_style' to get a mod_dtcl.so.  Or you can simply rename the dll :)   

5)  Run make install.  Make the changes to your Apache configuration as 
described on the mod_dtcl documentation, and you are off.

Notes :

	-- Tcl needs to be in the path of the web server
	-- These instructions assume you have the MingW32 gcc setup as well 
	   as a good collection of GNU tools on your NT machine (sed, grep, etc).
	   They also assume you have Tcl setup.  
	-- You will need a fairly recent version of the MingW32 toolset and the 
	   associated win32api fileset - see http://www.mingw.org for details on 
	   obtaining new releases.
	-- I've tried my best to make these instructions error free but
	   mistakes are possible.  

Good Luck,
Craig