Window geometry

[NancySumner1 aol com]

Is there a way to tell a gtk application what window geometry to use when it 
launches that is _outside_ of the code?  (For instance .Xdefaults file?)  I 
have been trying to find a way to do this - found something on the web that 
said gtk doesn't support Xt intrinsics.  Is this true?  If so - is there some 
other way (configuration file or something) I can tell my application where 
to put the window when it starts up?

Thanks in advance,
Nancy