Change image resolution in mapfile

[krishna S]

Hello all,
      I have to generate a 300 by 300 dpi wall map to print, I was
wondering how can we generate the map using mapserver, i know that usually
when the image is generated it gets saved in 72dpi. I am not displaying the
map in thw browser but i just want to generate the map so that i can print
it out.

      I searched the archives about this but couldnt find how to generate
it actually.

Any suggestions please .....

--kris