Shooting with rotation

1

Do anyone know how to make bullets shoot in the direction the player is heading or where the mouse is?
Like in a top down shooter!

Thanks

2

Vector2 mouse;
Vector2 player;

Vector2 dir = Vector2.Normalize(mouse-player);

3

Thanks! But do I just dir.Y += 2; or???

4

bulletposition += dir*(speedofthebullet)

5

Oh, thank you so much!