The complete list of implemented APIs:

Note: I did not write (nor did I use) the p/invoke signatures listed on the pinvoke.net website, so use them at your own risk. All of the APIs implemented below are fully compatible with both C# and VB.NET.

AllocateLocallyUniqueId - MSDN
CredUIPromptForCredentials - MSDN

RasClearConnectionStatistics - MSDN
RasClearLinkStatistics - MSDN
RasConnectionNotification - MSDN
RasDeleteEntry - MSDN
RasDeleteSubEntry - MSDN
RasDial - MSDN pinvoke.net
RasDialDlg - MSDN
RasEntryDlg - MSDN
RasEnumAutodialAddresses - MSDN
RasEnumConnections - MSDN pinvoke.net
RasEnumDevices - MSDN pinvoke.net
RasEnumEntries - MSDN pinvoke.net
RasFreeEapUserIdentity - MSDN
RasGetAutodialAddress - MSDN
RasGetAutodialEnable - MSDN
RasGetAutodialParam - MSDN
RasGetConnectionStatistics - MSDN
RasGetConnectStatus - MSDN pinvoke.net
RasGetCountryInfo - MSDN
RasGetCredentials - MSDN
RasGetCustomAuthData - MSDN
RasGetEapUserData - MSDN
RasGetEapUserIdentity - MSDN
RasGetEntryProperties - MSDN pinvoke.net
RasGetErrorString - MSDN pinvoke.net
RasGetLinkStatistics - MSDN
RasGetNapStatus - MSDN
RasGetProjectionInfo - MSDN
RasGetSubEntryHandle - MSDN
RasGetSubEntryProperties - MSDN
RasHangUp - MSDN pinvoke.net
RasPhonebookDlg - MSDN
RasRenameEntry - MSDN
RasSetAutodialAddress - MSDN
RasSetAutodialEnable - MSDN
RasSetAutodialParam - MSDN
RasSetCredentials - MSDN
RasSetCustomAuthData - MSDN
RasSetEapUserData - MSDN
RasSetEntryProperties - MSDN pinvoke.net
RasSetSubEntryProperties - MSDN
RasUpdateConnection - MSDN
RasValidateEntryName - MSDN pinvoke.net