Adding a Windows User Control to your Toolbox

Click on Tools in the menu bar,

select Add/Remove Toolbar Items

 Click on the .NET Framework Components tab

click the Browse button

Find the control's .dll file in its bin folder (browse to it) and select it.

The control will appear selected in the .NET Framework Components tab

Once the dialog box is closed, the control will appear at the bottom of the toolbox.

Contributed by Andrea Holloway