How to: Align a Control to the Edges of Forms
You can make your control align to the edge of your forms by setting the Dock property. This property designates where your control resides in the form. The Dock property can be set to the following values:
Effect on your control
Docks to the bottom of the form.
Fills all remaining space in the form.
Docks to the left side of the form.
Does not dock anywhere, and it appears at the location specified by its Location property.
Docks to the right side of the form.
Docks to the top of the form.
There is design-time support for this feature in Visual Studio.
To set the Dock property for your control at run time
Set the Dock property to the appropriate value in code.
' To set the Dock property internally. Me.Dock = DockStyle.Top ' To set the Dock property from another object. UserControl1.Dock = DockStyle.Top