In order to integrate Virtual Keyboard for WinForms into your Visual Studio project, select the Manage Nuget Packages from Project menu:

Open the Browse tab, and enter MindFusion.Keyboard.WinForms in the search field. Select the MindFusion.Keyboard package and click Install. If you plan to use other MindFusion components along with the keyboard (such as diagram, spreadsheet, calendar), select MindFusion.Pack.WinForms instead:

Once the package is installed, you should be able to add the VirtualKeyboard control to your user interface.