Urgent - How to find "holes" in curves (to close them)

 From:  Samuel Zeller
2888.6 In reply to 2888.5 
Hehehe hopefully

Another question, possible to select a surface and convert it to a curve ?

For example I draw a 2d circle, do a planar, erase the curve, I only have a surface.
I know I can click on that surface and shift select every curve, but how to do it automatically?