Hi, I've just been building Perl 5.6.0 / mod_perl 1.23 / Apache 1.3.12 on Windows NT and found something which may be of some use. The Apache installation does not seem to copy the headers and library files from the build directory into the install directory (which it DOES on Unix), so to build mod_perl you need to keep that Apache build build directory handy. I found that manually copying apache_1.3.12\src\include apache_1.3.12\src\os\win32\*.h apache_1.3.12\src\CoreR\ApacheCore.lib into the install directory and then pointing the DevStudio include/library paths at these locations in the install directory works fine, thus removing the need to keep the build directory floating about. This presumably means that I can now ditch the build directory and still be able to build mod_perl 1.24 when it comes using only my Apache install directory. - Steve Hay