How does one make form_open() generate a link to the exact current URL?

[eluser]tomclowes[/eluser]
Thats great ! Thanks.

So as to not create millions of posts - I will collate my queries here.

I am now playing with the image manipulation functions. I have a big image which I am creating a thumbnail of.

The space for thumbnails is 170 x 170 px.

Say I have an image which is 340px x 10px it is resized to 170px x 5px.

Is there a way to then increase the size of this image by essentially filling the remaining 165px wit 82.5px of black either side..? I was thinking some sort of negative crop.. ?
Thanks