Press and hold the button to activate the command

Hello, can someone tell me how to write a programming to activate the function when i press and hold the button for some time afterward to activate the function. i am using Silicon miccrocontroller.

Thanks.

while(1)
{
    if(P1.1==0)
   
    {
        wait();  // hold time

        if(P1.1==0)
             abc(); // abc() is function which u want to call
     }
}

Excuse me, if i would like to press and hold the button for 3 sec, what should the programming be writen.
Thank you. :-)

the wait() function can be adjusted for 3sec delay.. you can use the same program above...

but in above code once you press the button.. it will wait for 3 sec whether you have released it or still pressing it..

so you can do this same thing in other way too..
make use of timers..

// button = 0 active
// button = 1 inactive
if (!button){
	timeout = 0;
	//start some timer here...
	TR0 = 1;
	while((!timeout) && (!button));
        if(timeout && (!button)){
		function();
	}
	else{
		some_other_function();
		TR0 = 0;
	}
}

the above code works same as.. like in nokia keypad.. you press a key and release it. then you get a character displayed.. and when you keep it pressed for sometime it display numeric value of the key. i hope you understood..
the code above might need some testing.. so.. you can try it out...