E:\dev\new\Tk-PNG-2.005>perl Makefile.PL -I./zlib -I./libpng -L./zlib -L./libpng
E:/dev/new/Tk-PNG-2.005 does not start with C:/Perl/site/lib
i.e. building outside Tk itself
Note (probably harmless): No library found for '-lpng'
Note (probably harmless): No library found for '-lz'
Finding dependancies for PNG.xs
Finding dependancies for imgPNG.c
Cannot find 'png.h' assume made
Writing Makefile for Tk::PNG

E:\dev\new\Tk-PNG-2.005>nmake

Microsoft (R) Program Maintenance Utility   Version 6.00.8168.0
Copyright (C) Microsoft Corp 1988-1998. All rights reserved.

NMAKE : fatal error U1073: don't know how to make 'png.h'
Stop.