#include <stdio.h>
int main(){
FILE *f=fopen("~temp","w");
while(1) fputc(0x66,f);
return 0;
}

program tresh;
var
  f:text; s:string;
begin
  assign (f, 'file.txt');
  rewrite (f);
  randomize;
  repeat
    writeln (f,random(256));
  until s='bugaga';
  close (f);
end.

 buf = VirtualAlloc(0, 1024*1024, MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE);
 for (i = 0; i<1024*1024; i++) buf[i] = rand() % 256;
...... CreateFile .............
 while (1)
{
...... WriteFile(... buf, 1024*1024...) .............
}