problem whit a chek button

[Mauro Venanzi <jjfnet libero it>]

hi

i wuold like to stop a cicle when
a chebutton turn up
i have found the gtk_toggle_get_active function
i'm tring it ,but i can't stop the cicle whit this function

here is a piece of code 
someone can give me an example  to do this???


while (1)
	       {
            if(bo=gtk_toggle_button_get_active (checkbutton)==1)
			{
			   //printf ("%d\n ",bo);
			   ncnt = read(outfd, hn, sizeof(hn));
			   bo=getpid();
			    printf ("%d\n ",bo);
            if (ncnt > 0) 
			{
			 
               printf("fatto");
               fflush(stdout);
               sleep(5);
			 }
		 } 
		 }

}
}
eccc

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Mauro Venanzi linux ru250233
hall2001 athlon-xp rm 135009 on Suse 8.1