Wireframes Stencil: should I use Visio or Visual Studio?

We need a simple method to put together wireframes. What is the simplest way to achieve this? Visio? Looks like we need to buy a stencil.

I also read somewhere online (on msdn) without no links provided that you can do it in Visual Studio.

I need the ability to portray the following controls:

• links
• text fields
• buttons
• datagrids
• tree

You can take a look at ForeUI, it is quite interesting: http://www.foreui.com/