protected override HandleRef BuildWindowCore(HandleRef hwndParent)
{
_hwndHost = CreateWindowEx(0, "static", "",
WsChild | WsVisible,
0, 0,
_hostWidth,
_hostHeight,
hwndParent.Handle,
(IntPtr)HostId,
IntPtr.Zero,
0);
_viewport.Initialise(_hwndHost);
_viewport.LoadTexture("sample", "sample.png");
_viewport.Update();
return(new HandleRef(this, _hwndHost));
}