Hi, It would look to me like the gpcifunc.dll is a C dll not a .NET one? Isn't that what DllImport is for (note I do not know .NET very well - so I could be wrong). If it is a C Dll - then what you need to access that method is probably ctypes. Mark -----Original Message----- From: pythondotnet-bounces@python.org [mailto:pythondotnet-bounces@python.org] On Behalf Of Lalit DIGARI Sent: Thursday, March 30, 2006 7:05 AM To: pythondotnet@python.org Subject: [Python.NET] C# .net dll used in python Hello All, I am trying to use a c# dll in python application I follows the following steps. import CLR from CLR.System.Reflection import Assembly my_dll_name = Assembly.LoadWithPartialName('VPCI') from CLR.System.Windows.Forms import Form from CLR.TestWinForm import Form1 VPCI = Form1()// Form1 is a class in my .net dll but I am getting CLR.system.DllNotFoundException:unalble to laod DLL(gpci.dll) While gpci.dll is defined in my .net application as [DllImport("gpcifunc.dll")] unsafe public static extern Int32 gpciOpen (Int32 dReserved) ; Form where the exception genrating Can any one help me out. 2) in case I am using my_dll_name = Assembly.LoadWithPartialName('path of dll') Then my_dll_name is getting none while I am keeping the dll in my python root path it is working fine Anyone has any clue. Regard's Lalit _________________________________________________ Python.NET mailing list - PythonDotNet@python.org http://mail.python.org/mailman/listinfo/pythondotnet