<SoapDocumentMethodAttribute("http://schemas.microsoft.com/sharepoint/soap/directory/GetRoleInfo", RequestNamespace:="http://schemas.microsoft.com/sharepoint/soap/directory/", ResponseNamespace:="http://schemas.microsoft.com/sharepoint/soap/directory/", Use:=SoapBindingUse.Literal, ParameterStyle:=SoapParameterStyle.Wrapped)> _
Public Function GetRoleInfo ( _
    roleName As String _
) As XmlNode

Dim instance As UserGroup
Dim roleName As String
Dim returnValue As XmlNode

returnValue = instance.GetRoleInfo(roleName)

[SoapDocumentMethodAttribute("http://schemas.microsoft.com/sharepoint/soap/directory/GetRoleInfo", RequestNamespace="http://schemas.microsoft.com/sharepoint/soap/directory/", ResponseNamespace="http://schemas.microsoft.com/sharepoint/soap/directory/", Use=SoapBindingUse.Literal, ParameterStyle=SoapParameterStyle.Wrapped)] 
public XmlNode GetRoleInfo (
    string roleName
)

<GetRoleInfo xmlns=
   "http://schemas.microsoft.com/sharepoint/soap/directory/">
   <Role ID="1073741830" Name="Role_Definition" Description="Description" 
      Type="0" />
</GetRoleInfo>

Dim usrgrpService As New Web_Reference_Folder_Name.UserGroup()
usrgrpService.Credentials = System.Net.CredentialCache.DefaultCredentials

Dim ndGroup As System.Xml.XmlNode = usrgrpService.GetRoleInfo("Role_Definition_Name")

MessageBox.Show(ndGroup.OuterXml)

Web_Reference_Folder_Name.UserGroup usrgrpService = new Web_Reference_Folder_Name.UserGroup();
usrgrpService.Credentials= System.Net.CredentialCache.DefaultCredentials;

System.Xml.XmlNode ndGroup = usrgrpService.GetRoleInfo("Role_Definition _Name");

MessageBox.Show(ndGroup.OuterXml);