[Anjuta-list] using execl().. how?

[Luthfi <a luthfi gmail com>]

Hi all, i am new using anjuta.
i want to make an interface to execute several executable binary file
when click a button, i use this code in callback.c:
{
   char *arg;
   *arg=0;
   fork();
   execl("/Project/form1",arg);
}

when i run the program, after click the button, form1 is executed, but
opened twice. form1 doesn't have any argument.
if i del fork(), after clicking the button, an error message appear
and form1 could not be opened.
I need help. i want it only opened once after clicking the button.
Thanks.

Luthfi