googlemaps right click zoom out

hi folks

i am complete newbie concerning VB so please forgive if i am in the wrong.
i am playing with vb net using a program from a friend that basically i am disecting and reading books to learn as i go.
i have got a small prog that brings up the static google maps api and so far have been able to get the zoom to work on buttons both in and out, i lso have the zoom in working using the click method on the map. basically the problem i have is i cant get the zoom out to work on the mouse right click have looked at the declarations in vbnet but cannot find the right mouse click event can some one point me in the general direction as i feel as though i am on a merry go round with no way to get off.
cheers for your help