GO/OS info:

Go1.6 windows/amd64
GOARCH = amd64
GOOS = windows

Using x/exp/shiny, we were starting a new project and trying to manipulate the initial window size.

We expected using screen.NewWindowOptions{640,480} to result in a screen of 640 width and 480 height

The screen had no height. See here.

In shiny's windows driver, it sets width to be the option's width, then to be the option's height, without actually ever setting height. This should be a simple fix:

    if opts != nil {
        if opts.Width > 0 {
            w = opts.Width
        }
        if opts.Height > 0 {
            h = opts.Height
        }
    }