Close Tab with middle mouse click ---- Zoom in - out

1) I would like to close tabs clicking with the middle mouse on it, is
that possible in vim?
2) In Firefox, Chrome and other applications I use the Ctrl-scroll-up
to zoom in text and Ctrl-scroll-down to zoom out text. Is that
possible in vim (gvim) also?
I tried the plugin zoom.vim but it resizes my whole window and not
only the fontsize.

Thanks.
Rameo

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