Simple Web API Controller returning 404 - asp.net

Question

I just created a basic Web Controller in my project. I hit debug and try to browse to /api/duedate and I get a 404. I am new to controllers and have been looking at every tutorial I can find. None of them say I need to add anything more to get this to work.
Imports System.Net
Imports System.Web.Http
Public Class DueDateController
Inherits ApiController
' GET api/duedate
Public Function GetValues() As IEnumerable(Of String)
Return New String() {"value1", "value2"}
End Function
' GET api/duedate/5
Public Function GetValue(ByVal id As Integer) As String
Return "value"
End Function
' POST api/duedate
Public Sub PostValue(<FromBody()> ByVal value As String)
End Sub
' PUT api/duedate/5
Public Sub PutValue(ByVal id As Integer, <FromBody()> ByVal value As String)
End Sub
' DELETE api/duedate/5
Public Sub DeleteValue(ByVal id As Integer)
End Sub
End Class
My web.config looks like this:
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<appSettings>
<add key="aspnet:UseTaskFriendlySynchronizationContext" value="true" />
<add key="webPages:Version" value="2.0"/>
</appSettings>
<system.web>
<compilation debug="true" strict="false" explicit="true" targetFramework="4.5" />
<httpRuntime targetFramework="4.5" />
</system.web>
<system.serviceModel>
<behaviors>
<serviceBehaviors>
<behavior>
<!-- To avoid disclosing metadata information, set the values below to false before deployment -->
<serviceMetadata httpGetEnabled="true" httpsGetEnabled="true" />
<!-- To receive exception details in faults for debugging purposes, set the value below to true. Set to false before deployment to avoid disclosing exception information -->
<serviceDebug includeExceptionDetailInFaults="false" />
</behavior>
</serviceBehaviors>
</behaviors>
<protocolMapping>
<add binding="basicHttpsBinding" scheme="https" />
</protocolMapping>
<serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" />
</system.serviceModel>
<system.webServer>
<modules runAllManagedModulesForAllRequests="true" />
<!--
To browse web app root directory during debugging, set the value below to true.
Set to false before deployment to avoid disclosing web app folder information.
-->
<directoryBrowse enabled="true" />
<handlers>
<remove name="ExtensionlessUrlHandler-Integrated-4.0" />
<remove name="OPTIONSVerbHandler" />
<remove name="TRACEVerbHandler" />
<add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="*" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" />
</handlers></system.webServer>
</configuration>

Answer 1

I believe you need to add a route.
Routing in VB
If you read the last comment in this thread it should show you how to add routing to your app.

Answer 2

To help anyone else out and to simplify having to read through that long post. You need to create and modify your global.asax file to include this:
Sub Application_Start(ByVal sender As Object, ByVal e As EventArgs)
RouteTable.Routes.MapHttpRoute("WebApi1",
"api/{controller}/{id}",
defaults:=New With {.id = System.Web.Http.RouteParameter.Optional})
End Sub