Tutorial - Using Selection manager for open group in SolidWorks.
Here is the tutorial.
Start SolidWorks and open the attached file.
Under surfaces tab select boundary surface.
Now select the 3d sketches for direction1.
Select the first edge for the direction2.
Now right click and select SelectionManager.
Now select the both edges and click OK in selection toolbar.
Now we have open group of edges.
Click OK and the surface is generated.