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Problem with headers/search directories

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CBuser:
I think the problem is with my understanding of how the compiler and/or CB handles headers and search directories.  Now for some background.  I'm attempting to migrate from Dev-C++, which is the only IDE I've really used in the past couple or so years.  Today I downloaded and installed Code::Blocks nightly build 4235.  The default compiler is set as 'Cygwin GCC' (installed in "D:\cygwin"), which CB detected automatically.  I'm attempting to create projects for my old C files that I had projects for in Dev-C++.  In one project, a 'generic' DLL, an early setup of CB resulted in a successful compile.  After compiling, I attempted to add a compiler 'search directory' entry to point to the Microsoft Platform SDK include directory (as this will be necessary with some of my other projects), with a path of "D:\Program Files\Microsoft SDK\include".  When I attempted to re-build my project, I was deluged with build errors, the first of which are shown below.

Compiling: generic.c
In file included from D:/c/genericdll/generic.c:2:
D:/Program Files/Microsoft SDK/include/windows.h:157:19: excpt.h: No such file or directory
In file included from D:/Program Files/Microsoft SDK/include/winnt.h:116,
                 from D:/Program Files/Microsoft SDK/include/windef.h:166,
                 from D:/Program Files/Microsoft SDK/include/windows.h:161,
                 from D:/c/genericdll/generic.c:2:

This leads me to my first question.  Why is the compiler trying to use the windows.h in my PSDK directory, instead of the default Cygwin directory that was used previously?  I found the "excpt.h" file in two primary locations, "D:\Program Files\Microsoft SDK\src\crt" and "D:\cygwin\usr\include\mingw".  If I add "D:\cygwin\usr\include\mingw" as a search directory, subsequent build attempts spew out many more errors, the first two of which are shown below.

Compiling: generic.c
In file included from D:/Program Files/Microsoft SDK/include/windef.h:166,
                 from D:/cygwin/usr/include/mingw/excpt.h:20,
                 from D:/Program Files/Microsoft SDK/include/windows.h:157,
                 from D:/c/genericdll/generic.c:2:
D:/Program Files/Microsoft SDK/include/winnt.h:237:1: warning: "_cdecl" redefined
<built-in>:77:1: warning: this is the location of the previous definition
D:/Program Files/Microsoft SDK/include/winnt.h:674:2: #error Must define a target architecture.

If I replace the "D:\cygwin\usr\include\mingw" search directory with "D:\Program Files\Microsoft SDK\src\crt", subsequent build attempts again results with a flood of errors, the first two of which are shown below.

Compiling: generic.c
In file included from D:/c/genericdll/generic.c:1:
D:/Program Files/Microsoft SDK/src/crt/stdio.h:23:2: #error ERROR: Only Win32 target supported!
D:/Program Files/Microsoft SDK/src/crt/stdio.h:31:2: #error ERROR: Use of C runtime library internal header file.
In file included from D:/Program Files/Microsoft SDK/src/crt/stdio.h:47,
                 from D:/c/genericdll/generic.c:1:
D:/Program Files/Microsoft SDK/src/crt/cruntime.h:27:2: #error ERROR: Use of C runtime library internal header file.

What am I doing wrong?  I didn't change any of my code, I simply added a search path for future use which has resulted in an inability to build my project.  I don't understand what's going on here.  In my Dev-C++ installation (no longer installed), I setup my project with a 'Library Directory' of "D:\Program Files\Microsoft SDK\Lib" and an 'Include Directory' of "D:\Program Files\Microsoft SDK\include", and all was well (no problems building the project).

Please help a poor confused noob.  Any input would be appreciated.

dmoore:
project and compiler paths take precedence over the default mingw search paths. your new includes have overlapping filenames with the default includes. is it even possible to compile against the MS SDK with cygwin gcc?

CBuser:
Well, as I said, Dev-C++ was able to compile this same c file (under a Dev-C++ project dedicated to just this file) with the PSDK header/lib directories included in the project.
D:\Dev-Cpp\bin\gcc --version shows "gcc (GCC) 3.4.2 (mingw-special)"

raph:
I would use mingw as compiler (like dev-c++ did).
You don't need Microsoft's psdk.

dmoore:
you might need to reorder your search directories. what do your project and compiler search paths currently look like?

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