How to position a window on sprayhood with FlowASrf

I’m trying to paste a window with FlowAsrf
Is there any other option?
after unroll, something like Roll back upp function?

What’s the problem? It would seem the input just needs to be oriented correctly, I don’t know what you’re using as your source surface but I hope it’s not the trimmed face there, that’s not how you use FlowAlongSrf. Use CreateUVCrv to get a rectangle for the surface you’re trying to flow onto, make a Plane from that, and then position your 2D on it.