Oops. I just noticed something. Lobo3433 example is showing the Mark Sharp feature, which is commonly mistaken for Edge Crease but really has nothing to do with Subdivision. The Mark Sharp feature has to do with how an edge looks when you apply Smooth Shading only, and will make edges appear sharp after smooth shading is applied. It won't affect the actual geometry with subdivision. Edge Crease (Shift+E), on the other hand, will actually change the influence of the geometry based on a factor input variable of your choosing after a subdivision surface modifier is applied. It does something similar to the Vertex Crease, but unlike Vertex Crease, which Blender does not have, Edge Crease also influences geometry around those selected edges to create either a point or a sharp edge on subdivided geometry.

To illustrate the difference, I've included this screen capture below. It shows two cubes with subdivision surface applied. One cube has two edges with Edge Crease set to 1, the other has the same edges with "Mark Sharp" applied:

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