Push from A to B

Hrm well I've read through the wiki and searched for forum and I can't find anything of use. What I am looking for is something which will push Obj/Av from point A towards point B, not the whole way but a certain amount with both key's and positions being known. I know llPushObject() will work but I can't seem to work out how to get the correct Vector impulse.

So it would perferable look something similar to llPushToPos(key id, float power, vector TargetPos).

Thanks in advance.

I think that if you subtract the vector position of point B from point A, you might get a suitable impulse vector.

that worked great thanks