Hacking Questions About App Making and loading stuff

[MasterHand300]

hi,

how would i go apon making my own app for the hombrew channel

and if i wanted something to load up

Like in this video where when he goes to the sd menu and it asks him if he wants to load from sd card how would i do that to load an app or something by pressing a button on the wii console or going to the sd card menu

 

[MasterHand300]

anyone