If you need a date picker control as well as other controls lacking in the current .Net Moble Framework please see the following excellent article:

Migrating eVB Forms to Visual Basic .NET
http://msdn.microsoft.com/mobility/default.aspx?pull=/library/en-us/dnppcgen/html/migrating_evb_forms.asp

There is a link to

OpenNETCF.org
http://www.opennetcf.org/CategoryView.aspx?category=Home

where the controls can be downloaded.

Also take a look at
http://www.gui-innovations.com/html/evb_to_dotnet_forms.html

a program that will move eMbedded forms to .NET forms. Haven't tried it yet but it looks good.

Good Luck
CU