Possible Duplicate:
How to retrieve the Screen Resolution from a C# winform app?
How can I get the screen size in Windows forms?
Possible Duplicate:
How to retrieve the Screen Resolution from a C# winform app?
How can I get the screen size in Windows forms?
Check the Screen class and its property Bounds
Screen.PrimaryScreen.Bounds.Width;
Screen.PrimaryScreen.Bounds.Height;
Screen.PrimaryScreen.Bounds.Size;