Originally Posted by space

That helps, but most built-in flashes doesn't have this option.

Anyway the flash will kill a good mood in a picture.

Example: Your family in front of the fireplace an evening.
Flash on = everybody looks pale, and it looks like it's in the middle of the day.
Flash off = The real colors of how you see things in person appares in the picture.

I allways tries to set the ISO value higher, and use longer exposure times for indoor / dark scenes.