//HERE IS THE main.c
#include <stdio.h>

int sum(int a,int b);

int main()
{
int result;;

result = sum(150,350);
printf("The sum is %d\n",result);
return(0);
}

;HERE IS THE sum.asm in NASM
segment data

segment bss

segment text
global sum
sum:
push ebp
mov ebp,esp
push ebx

mov ebx,[ebp+8]
add ebx,[ebp+12]

mov eax,ebx ; return value
pop ebx
mov esp,ebp
pop ebp
ret

I know how to complie and linking in linux. My Q is how to do the same thing in windows using FASM

Well, I would say, make a coff ( .obj) out of your sum.asm and link it to your main. For compiling the c file you should use mingw or cygwin. afaik there are samples of coff in the fasm win32 package.

look at "High Level Languages" section of this forum, into "About this section" thread, and follow to examples.

Thanks vid for pointing me to the right place. It helps!