Happy Holidays everybody! Hope you all have a great new .NETTING year ! Thanks Eddie.
You are right the dll was not being loaded. But the reason was not that it was not in the right place but it was due to a global variable being declared in the .cpp file but not declared in the .h file. There were no compile errors (C++ is too forgiving at times) and that in effect prevented the dll from getting loaded. All the exported functions worked just fine. Bye Aman -----Original Message----- From: Eddie Lascu [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 21, 2004 9:09 AM To: ADVANCED-DOTNET@DISCUSS.DEVELOP.COM Subject: Re: [ADVANCED-DOTNET] Unmanaged MFC dll loading problem I think your app cannot find the .dll. You need to copy the .dll (once it was generated) in the "your_project\bin\debug" or "your_project\bin\release" folder (based on which version you generate). Post build events can help you with that. If you have it set up so that all executables are sent to a working folder, you need to send your .dll there as well. Just a side note, in the MFC .dll you need to decorate your "TestFunction" with extern "C", 'cause otherwise it will not be exported with that name and your C# code will not be able to call it. There is a utility that you can use to inspect all the exported functions in a .dll. Let me see if I can remember what is it called. Oh yeah, it's called dumpbin. I hope this will help. Eddie -----Original Message----- From: Unmoderated discussion of advanced .NET topics. [mailto:[EMAIL PROTECTED] Behalf Of Jain, Aman Sent: Monday, December 20, 2004 5:07 PM To: ADVANCED-DOTNET@DISCUSS.DEVELOP.COM Subject: [ADVANCED-DOTNET] Unmanaged MFC dll loading problem Hi Everybody, I have a winforms application in which I load a regular MFC dll. Even before the InitInstance is called on the dll, there is a crash. If I select "Ignore" on the crash the dll loads successfully and there is no problem in using all of its exported functions. If I select "Retry", a CLR DllNotFound exception is thrown. If I debug from the C++ code and select "Retry", the stack shows that AfxWinInit is called in which the SetCurrentHandles() crashes on the second assert. void CWinApp::SetCurrentHandles() { ASSERT(this == afxCurrentWinApp); ASSERT(afxCurrentAppName == NULL); // Crashes here . . } On C# side, I call the exported function as follows: [DllImport("WaferMngr.dll")] private static extern void TestFunction(); Thank you in advance. Aman. =================================== This list is hosted by DevelopMentor(r) http://www.develop.com Some .NET courses you may be interested in: Essential .NET: building applications and components with C# November 29 - December 3, in Los Angeles http://www.develop.com/courses/edotnet View archives and manage your subscription(s) at http://discuss.develop.com =================================== This list is hosted by DevelopMentor(r) http://www.develop.com Some .NET courses you may be interested in: Essential .NET: building applications and components with C# November 29 - December 3, in Los Angeles http://www.develop.com/courses/edotnet View archives and manage your subscription(s) at http://discuss.develop.com =================================== This list is hosted by DevelopMentorŪ http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com
