keyboard interactions, native keycode is the virtual key code value from your OS
public static void KeyDown(HHTMLBrowser unBrowserHandle, uint nNativeKeyCode, EHTMLKeyModifiers eHTMLKeyModifiers) { InteropHelp.TestIfAvailableClient(); NativeMethods.ISteamHTMLSurface_KeyDown(unBrowserHandle, nNativeKeyCode, eHTMLKeyModifiers); }