how to make a knobi button turn and fader buttons go up and down ???

[thomasmessi]

Hello guys, how are you?
Well, I would like to know how to make a code so that the button of a certain program that is on the screen rotates like a knobi button that goes from volume 0 to volume 127. of volume but through keyboard keys only. Also, how to make a "slippery" fader button go up by pressing page up and go down by pressing page down ????

thanks for listening!