How do I do weapon select

Hello

i am actually working on a game where i want to implement weapon select system : if mouse wheel goes up next weapon if down previous weapon

can you help me please?

You can either have the weapon sprite be filled with different weapons on each frame and simply increment/decrement the frame number when the mouse wheel is moved, or you can line the sprites up in a row on a layer below with just the box open and move the Y-position of the line of sprites up and down.

well i have for every weapon a sprite animation for the player

Insert the mouse object into your project, when mouse scrolls up, add 1 to a variable, then if variable = 1 set animation. If variable goes over the amount of weapon animations , set it back to zero, opposite for when the mouse scrolls down, so subtract 1 to a variable. Hope that works for you. (: