Is there a guideline for designing Windows Applications, whereas they specify font size and spacing, best screen resolution?
The first and second results on the first page for Google search provide the right answer to this question, as checked today.– KrisDec 1, 2011 at 6:43
Yes, of course MS has its own user interaction guidelines and they are available online: Windows User Experience Interaction Guidelines
It's worth looking out for an older version of the Windows guidelines - which had more actionable detail:
Here's a link to them in book form:
The Windows Interface Guidelines for Software Design
Scroll down for the Contents list...
Microsoft used to have these on their website - but I can't find them now.