Brooks Short - Tampa, Florida , Sep 27, 2004; 12:38 p.m.
You have to balance the lighting inside the room with the light outside the windows. The best way to do this is to use strobe off camera. Either a bounce into a neutral colored ceiling or wall or a softbox placed to one side. I'm referring here to powerpack or monolight strobes, not on-camera flashes.
You can then use an f-stop for the strobe and the appropriate shutter speed for the outside light.
A more involved method, which is popular with cinema crews is to gel the windows with neutral density material. You can use regular ND material which is available in rolls or you can use warm ND material to color balance the daylight to interior tungsten light.
Finally, the simplest method is to wait until sunset, near evening, when the sun has just set and the sky is still blue. Often architectural shooters will wait until this time and use tungsten film and tungsten lights which renders the outside daylight as a deep bluer.