You can use the Dock and Anchors properties of the controls and the resize
event of the form.
For example if you have an edit box as large as the form, there is no need
to put the code to resize it in the Resize event, you only have to set the
Anchors properties to Left, Top, Right so the edit box will automatically
keep the distance from the Left, Top and Right borders of the form (and
automatically resize).
You can also play with the Dock property, try it and see what are the
effects.
HTH
Ciao
Formentz