Function SteamAPI_ISteamHTMLSurface_SetPageScaleFactor 

pub unsafe extern "C" fn SteamAPI_ISteamHTMLSurface_SetPageScaleFactor(
    self_: *mut ISteamHTMLSurface,
    unBrowserHandle: HHTMLBrowser,
    flZoom: f32,
    nPointX: c_int,
    nPointY: c_int,
)