[ask] Keypad for PIC (C language)

hay, i want to ask for my problem maybe it's very simple.
Anyone have source code scanning keypad for PIC?
I've made the source code using an existing library in MikroC. But, i'm failed.
Can anyone explain about how to use keypad in mikroC libraries? I am confused about the command "Keypad_Key_Click ()" and "Keypad_Key_Press ()"