Hello, I'm having a problem with CCW and method parameters. Some of the parameters are classes. It seems that these classes (or at least the properties inside the class) are not seen from my VB client Do I have to declare an interface for these classes (eg. TransModes)? If yes, does anyone k...more >>

Hi - The following snippet of code: class Class1 { [DllImport("kernel32")] public static extern ulong GetPrivateProfileString([MarshalAs(UnmanagedType.LPStr)]string app, [MarshalAs(UnmanagedType.LPStr)]string key, [MarshalAs(UnmanagedType.LPStr)]string def, StringBuilder r...more >>

I have a .exe application which exposes several COM In VB 6.0 I can instantiate a class by using Set myClass = GetObject(path, progid) where path is the path on harddisk to a file (actually a .INI file in this case) and progid is the progid in registry. The .exe was not running, but was started ...more >>

I have several problems with COM Callable Wrappers implementation. Please answer any of the ones you know: 1. Can't get the ProgIdAttribute("Name") to work. I use ComClassAttribute(guid,guid,guid) for all my exposed classes so I was wondering if there is a conflict between these two Attributes...more >>

Hi, I try to call c function in C#,What is the syntax of DllImport's EntryPoint field? Why some of extern method need to point out this field while some of them do not need? In my project, A C function defination is //**************** __declspec(dllexport) SbVec2s SoWinFullVwrGetVie...more >>

Hello, I've developed a MFC based ActiveX control using VC++ 6. In the last days I've tested the control compatibility with the various language of Visual Studio.NET and it seemed to work correctly. Today I was forced to change the control version stored inside the .odl file from 7.3 to 7.4 a...more >>

I am writing an application that gets data from excel worksheets, it works fine for most workbooks but when I open some by using the following line of code: _xlApp = new Excel.ApplicationClass(); Excel.Workbook WorkBook1 = _xlApp.Workbooks.Open(FilePath,0,true, 5,"", "", true, Excel...more >>

I am try to access a remote com server from my c# app. The server has no dispatch interfaces. Is this possible? -- Howard Swope Software Engineer Spitz, Inc [http://www.spitzinc.com] ...more >>

Hi, I wrote a C# wrapper for the ReadConsole Win32API as following: (Original unmanaged signature) BOOL ReadConsole( HANDLE hConsoleInput, LPVOID lpBuffer, DWORD nNumberOfCharsToRead, LPDWORD lpNumberOfCharsRead, LPVOID lpReserved ); (Managed signature) [DllImport(KERNEL32...more >>

Hello All, I have a problem with ASP & VB 6 using an Interop Assembly . I marshal an array in VB.NET, mark it as <MarshalAsAttribute(UnmanagedType.LPArray)>, and I am able to retrieve the correct values in VB6 using Late Binding, not predefining specific datatypes for the array. But ASP seems ...more >>

Hello, I am trying to Marshal an Array consisting of custom Objects from VB.NET to VB6. The function signature in VB.NET is like the following: Public Function GetItemArrary (Byval ItemCode as String) as <MarshalAsAttribute(UnmanagedType.LPArray)> Array End Function When I use "Regasm...more >>

Has anyone tried using the Win32 low level MIDI functions in .NET/C#? What I'm trying to do is send and receive sysex-messages but I just can't figure out how to declare and use the midi* APIs. I've successfully declared and used the APIs for getting device caps and opening and sending shor...more >>

How can I expose VB.NET modules (shared classes) through a COM callable wrapper? This works with classes but not with modules: <ProgId("Loconet_caca"), ComClass("383F5F0D-ABFE-414C-B71C-E2369AA8BCCD", "BE00CB07-54ED-4322-8075-125F3F0D2EF2", "6444E0EF-91C5-4C4A-992A-3CE8325F1528")> Public ...more >>

I am trying to get a reference to an ATL COM singleton object running on a Windows CE 4.1 (w/DCOM) device from a C# client. I have no problem accessing it from a Win32 client. The code that I am using to instanciate the object is: Type t = Type.GetTypeFromCLSID(guid,"machinename",true); obj...more >>

Hi everybody, I have a customer using Win2K, MQSeries 5.2 and MQAX200.DLL from VB.NET using interop. I could get some crash dumps and see that MQAX200.DLL is raising exceptions from DLLUnregisterServer function. During analysis I could see that File Version from MQAX200 is 1.0.0.1 whe...more >>

Hello All, I am in the process of migrating the business layer of a web application into VB.NET and also implementing HTTP Binary Remoting between the Business Object Server and the Web Server (IIS) from where ASP pages call the business objects. I have a very strange problem. The ASP and ....more >>

Hi there, I have a wiered scenario. I have two structures defined this way in unmanaged dll. struct A{ char * name; int ID; }; struct B{ struct A* record; }; Then I have a function in the dll that consumes a pointer to struct B. like this. int InitRecord(st...more >>

Hi there. A method of my implementation of a COM interface takes an interface as parameter, which I never use. I could save the code for the definition of that interface, but what would be a substitute for that parameter ?? Maybe IntPtr ?? Thanks Daniel ...more >>

Hi, Does anyone know of any tutorials of using the UxTheme.dll functions from within a C# app...i seem to be having a serious 'brain fade' with this...can't draw the correct fonts etc...any help would be appreciated. Cheers Kieron ...more >>

Hi, I've been trying use the GetThemeColor function from the uxTheme.dll in a C# app...but i can't seen to get a valid result? Could someone tell me what I'm doing wrong here?? [DllImport("uxTheme.dll", EntryPoint="GetThemeColor", SetLastError=true, CharSet = CharSet.Auto, ExactSpelling = tr...more >>

Actually I want to access the IHtmlDocument2Ptr interface, but I find that I can't add mshtml.dll as a reference. Therefore I think I have to translate the COM interface(which is inside mshtml.h) to C#. But it is very complicate to translate, because it contains other inferfaces and many methods a...more >>

Hi there, I am trying to use marshal.ReallocHGlobal function. My unmanaged dll requires call back functions that the unmanaged routine can use to allocate, reallocate and free memory. For allocating and freeing memory I can use the Marshal.AllocHGlobal and Marshal.FreeHGlobal functions. ...more >>