I used it, but showing errors with its own examples. I downloaded the flat assembler version for windows.
The error is : Cannot find file win32a.inc.
I however saw that the file was there, in its Include folder. I tried shifting it to many places, even in the folder, where the source file is present, but of no use. I am not able to figure out the problem, does any one know something about it. Thanx.

you have to set %fasminc% environment variable to point to your \include directory.

Read the section 1.1.1 of FASM.PDF

on windows xp right-click my computer, advanced tab, environment variables button, add new variable to top listbox set to your include directory no trailing backslash

c:\fasm\include not c:\fasm\include\

Thankyou verymuch, i got it.