C#

public class ImpersonateUser<br />
   {<br />
      [DllImport("advapi32.dll", SetLastError = true)]<br />
      public static extern bool LogonUser(<br />
          String lpszUsername,<br />
          String lpszDomain,<br />
          String lpszPassword,<br />
          int dwLogonType,<br />
          int dwLogonProvider,<br />
          ref IntPtr phToken);<br />
<br />
      [DllImport("kernel32.dll", CharSet = CharSet.Auto)]<br />
      public extern static bool CloseHandle(IntPtr handle);<br />
<br />
      private static IntPtr tokenHandle = new IntPtr(0);<br />
      private static WindowsImpersonationContext impersonatedUser;<br />
<br />
      // If you incorporate this code into a DLL, be sure to demand that it<br />
      // runs with FullTrust.<br />
      [PermissionSetAttribute(SecurityAction.Demand, Name = "FullTrust")]<br />
      public void Impersonate(string domainName, string userName, string password) {<br />
         try {<br />
<br />
            // Use the unmanaged LogonUser function to get the user token for<br />
            // the specified user, domain, and password.<br />
            // Xc: ---- For const descriptions see<br />
            // ms-help://MS.MSDNQTR.v80.en/MS.MSDN.v80/MS.WIN32COM.v10.en/secauthn/security/logonuser.htm<br />
            //const int LOGON32_PROVIDER_DEFAULT = 0;<br />
			const int LOGON32_PROVIDER_WINNT50 = 3;<br />
			const int LOGON32_LOGON_NEW_CREDENTIALS = 9;<br />
		    //const int LOGON32_LOGON_SERVICE = 5;<br />
            // Passing this parameter causes LogonUser to create a primary token.<br />
            //const int LOGON32_LOGON_INTERACTIVE = 2;<br />
            //const int LOGON32_LOGON_NETWORK = 3; <br />
            tokenHandle = IntPtr.Zero;<br />
            <br />
            // Call  LogonUser to obtain a handle to an access token.<br />
            // Xc: ---- LogonUser documentation<br />
            // ms-help://MS.MSDNQTR.v80.en/MS.MSDN.v80/MS.WIN32COM.v10.en/secauthn/security/logonuser.htm<br />
            bool returnValue = LogonUser(<br />
                userName,<br />
                domainName,<br />
                password,<br />
                LOGON32_LOGON_NEW_CREDENTIALS, // Xc:-- will cache logon information for disconnected operations<br />
                /*LOGON32_LOGON_NETWORK, // Xc:-- This type of access is faster */<br />
                //LOGON32_PROVIDER_DEFAULT,<br />
				LOGON32_PROVIDER_WINNT50,<br />
                ref tokenHandle);         // tokenHandle - new security token<br />
<br />
<br />
            if (false == returnValue) {<br />
               int ret = Marshal.GetLastWin32Error();<br />
               Console.WriteLine("LogonUser call failed with error code : " +<br />
                   ret);<br />
               throw new System.ComponentModel.Win32Exception(ret);<br />
            }<br />
<br />
            // Xc: ---- Assume new identity<br />
            WindowsIdentity newId = new WindowsIdentity(tokenHandle);<br />
            impersonatedUser = newId.Impersonate();<br />
<br />
         }<br />
         catch (Exception ex) {<br />
            Console.WriteLine("Exception occurred. " + ex.Message);<br />
			 return;<br />
         }<br />
      }<br />
<br />
      // Stops impersonation<br />
      public void Undo() {<br />
         impersonatedUser.Undo();<br />
         // Free the tokens.<br />
         if (tokenHandle != IntPtr.Zero)<br />
            CloseHandle(tokenHandle);<br />
      }

ImpersonateUser iU = new ImpersonateUser();<br />
<br />
				iU.Impersonate(DomainName, UserName, Password);<br />
				System.ServiceProcess.ServiceController  [] myController1;<br />
				myController1 = System.ServiceProcess.ServiceController.GetServices("10.8.2.120");<br />
<br />
				foreach( System.ServiceProcess.ServiceController controller in myController1 )<br />
				{<br />
<br />
					MessageBox.Show(controller.ServiceName);<br />
				}