How does your yard face east, west, north or south and is there a break in the trees somewhere. If it faces south you may get some sun especially if there's a break in the trees on the south side. However I don't think you'll be able to plant things requiring full sun so you may have a hard time growing vegetables.

As for putting fruit trees in front of your windows. Do you mind having a dark house with poor ventilation from the windows. Even dwarf fruit trees will grow 5 or 6 feet tall or taller and will shade your windows and prevent air circulation from those windows

Are you trying to grow vegetables/fruit, for which you will need sun, or ornamentals? If the latter, there are a huge number of plants that prefer dappled shade.