Fill the Surface

There are severl ways. Do you need something like this?

There is no one click operation in Creo to do this. Since the curves are tangent, you can't use a boundary blend to close the open edge.

The usual process is to build some curves and then create boundary blends.

If you have the style module, then, you will have more tools available.

Another option starting in Creo 3 is the Freestyle tool. Take a look at the video.

Jose

If you watched my video, you can see that I selected 3 chains to create the boundary.blend.

In Creo hold Shift to append curves to current chain and Control to add a new chain.

So, step by step:

1 - Click on boundary blend button

2 - Select first edge                                                           (This is first chain)

3 - Hold Shift and select the adjacent edge                         (added edge to first chain)

Be careful in this step to not select all open edges, it may happen.

4 - Hold Control and select the curve                                    (Second chain)

5 - Hold Control and select another edge                              (Third Chain)                        

6 - Hold Shift and select last edge                                         (added edge to third chain)

7 - Press Ok

This is it...

Jose

You can also try Style feature (if you have ISDX license): Surface tool -> turn on Options-> Trimmed Rectangle -> "Use for 3 or 4 boundaries".

This would create trimmed rectangle surface that are are looking for.

I'd recommend in your case to turn off default connections in Preferences dialog, to avoid automatic tangent connections which you don't need.

i think ISDX will also work just fine.