enable Micro C i/o as digital using pic18f442

Hi,

Just a quick one. i want to use port d as my input and suppose i write a code like this

trisd=1;

FYI, im using micro and and the pic im using is pic18f442.

how can i write a code whereby i want to use portd pin d0 as a digital input?

let say if im using port d pin d0 to turn on portb pin b0?