How to automatically resize window and component in any screen resolution

I have a windows application on C#.Net .There I set the Parent Window Size to (1025, 742) , the Start Position to Center Screen ,Window State to Normal.When I run the application in 1280 by 960 Screen Resolution(17' monitor), it takes the full Screen size .The Problem is when I Try to run the application in 1024 by 768 Screen Resolution(15' monitor),the Parent window does not take the full screen size,What I don't desire.How can I Set the Parent Screen size so that It takes the full screen size in all screen resolutions in all type of monitors ant components in that window resize themselves automatically.

help me

thanks