There are the tools needed to build a .T32 dll :
uncompress the ZIPfile in a directory, which will contain :
- The .H file, RC.EXE, RCDLL.DLL and LINK.EXE from Visual C++ 4.x
- RESOURCE.H, VER_INFO.RCV fro WinImage translation kit
- the .RC file translated

To build the .t32, you'll do:
rc -dCTL3D220 -dLANGAGE -r -fo winimarc.res winimarc.rc
link -dll -out:winimarc.t32 /MACHINE:IX86 /NOENTRY -subsystem:windows WINIMArc.RES

Note : for building a Help file modified with WinWord, you need Help Compiler
5.05 You can get it by ftp :

ftp://ftp.microsoft.com/softlib/MSLFILES/PW1118.EXE


List of .H included from Win32 SDK :
CTYPE.H         POPPACK.H       PSHPACK1.H      PSHPACK2.H      PSHPACK4.H
PSHPACK8.H      STDARG.H        STRING.H        VER.H
WINDEF.H        WINNT.H         WINUSER.H       WINVER.H

the Windows.H is a 'mini' windows.h that contain :
//---
#include "windef.h"
#include "winuser.h"
#define WIN32
//---