pnglib Files

1)usage:
  ld_file.exe <file.png>
  example 1:  ld_file.exe ..\pnglib.png
  example 2:  ld_file.exe ..\01.png

2)how to build ld_file.exe:
2.1)modify the path of borland c.
  In my computer, it is in E:\program\BC4.5
so i write this path in all batch files as below.
But it is maybe not your bc path.
You can modify them in batch files.

2.2)compile and link:
  make.bat will make ld_file.exe, after compile over 20 files which are in [source] folder.
That's original designed by Thomas.  

  mak3.bat will make ld_file.exe, after compile ld_file.c and pnglib.c.
Because the later #include over 20 files which are in [source] folder.
That's quick and dirty technique by Leisure bamboo.

  mak2.bat compile ld_file.c and pnglib.c, like mak3.bat, to make ld_file.exe.
But it define "_I_SIZE=256" to save memory of reading file.

  dll.bat will make ld_file.exe by ld_file.c, and make png.dll by pnglib.c.
After wrap all png function in the dll, so all variable(which in ld_file.c)
will NOT worry about their names conflict with
over 20 files(which are in [source] folder).