pinvoke.net: Edit: ole32.CoCreateInstance

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Summary: The CoCreateInstanceEx API

!!!!C# Signature:
 [DllImport("ole32.dll", CharSet=CharSet.Unicode, ExactSpelling=true, PreserveSig=false)]
 static extern void CoCreateInstanceEx(
   [In, MarshalAs(UnmanagedType.LPStruct)] Guid rclsid,
   [MarshalAs(UnmanagedType.IUnknown)] object pUnkOuter, 
   CLSCTX dwClsCtx,
   IntPtr pServerInfo, 
   uint cmq, 
   [In, Out] MULTI_QI[] pResults);
!!!!User-Defined Types:
[CLSCTX], [MULTI_QI]

!!!!Notes:
None.

!!!!Tips & Tricks:
Please add some!

!!!!Sample Code:
Please add some!

!!!!Alternative Managed API:
Have a look at System.Activator.CreateInstance@msdn and its various overloads. Sample:
 Guid CLSID_ShellDesktop = new Guid("00021400-0000-0000-C000-000000000046");
 Type shellDesktopType = Type.GetTypeFromCLSID(CLSID_ShellDesktop, true); 
 object shellDesktop = Activator.CreateInstance(shellDesktopType);

If you just want to create an instance on a specific server, you can pass the server name into GetTypeFromCLSID:
 Guid CLSID_ShellDesktop = new Guid("00021400-0000-0000-C000-000000000046");
 Type shellDesktopType = Type.GetTypeFromCLSID(CLSID_ShellDesktop, "REMOTESERVER", true); 
 object shellDesktop = Activator.CreateInstance(shellDesktopType);

Documentation: CoCreateInstanceEx@msdn on MSDN