我不太下面为什么你需要隐藏和显示形式。你只是试图让的形式来刷新？如果是这样，只需拨打：

I'm not quite following why you need to hide and show the form. Are you just trying to get the form to refresh? If so, just call:

Application.DoEvents()

否则，你可以尝试无效的控制：

or else you can try invalidating your control:

Image1.Invalidate()

这应当引起你的表单进行更新。你不应该需要隐藏和重新显示。如果这不是你的问题，让我知道更详细的问题是什么。

That should cause your form to update. You shouldn't need to hide and show again. If this isn't your issue, let me know in more detail what your problem is.