SolidWorks 2014 introduces the ability to find and use virtual sharps on the on-the-fly while creating dimensions.

Start any dimension tool. Right-click on model or sketch geometry Choose “Find Intersection”. Left-click on any model or sketch geometry that intersect the first selection. The Virtual Sharp element is automatically added, the point is automatically applied as a selection for the dimension tool.

See the attached video below (AVI will open, not an embedded video).

On-the-fly Virtual Sharps (AVI video)