Quote - - Set the display setting to Wireframe.

• Now go to AnimationMake Movie.
• In Format select Image Files.
• In Render select Preview
• In Options select Anti Alias.
• In Resolution set the size of your image.
• In Time Span set Start and End Frame to 1
• Click the Make Movie button.

You effectivly make a movie of a single frame with the render settings set as the Preview Window.

Hope this helps.

 
I'm not 100% certain (can't check right now) but could you not also do this using "Preview" in normal (single-frame) render settings?