Hello, After I installed Visual Studio 2005 I noticed that when I try to add a reference to a type library (tlb) I get the message "Could not load the type library, Error loading the type library. After much research I uninstalled VS2005 and went back VS2003 but with still the same problem. ...more >>

Gents, Is it possible to do Dyanamic Data Exchange using C# in .NET. Please discuss. Regards, Anoop ...more >>

Hi there, Is it possible to export an image file (.jpg/.gif) from excel using office interop ? If so, how do you do this? Are there any code examples available? Thanks. ...more >>

All, I'm authoring a C++ .dll & C# .dll and need a little help. I am experienced in interop but this one has me stumped. Does anyone have a simple example of how to declare a C++ exported function that can return a struct array in one of the parameters to C#? The C# .dll would have no ...more >>

We have: [StructLayout(LayoutKind.Sequential, CharSet= CharSet.Ansi)] public unsafe struct SP_DEVICE_INTERFACE_DETAIL_DATA { public int cbSize; [MarshalAs(UnmanagedType.ByValArray, SizeConst=84)] public char[] DevicePath; } The setupapi.dll method SetupDiGetDeviceInterfaceDetail r...more >>

Hi Im trying tu use deviceiocontrol to retrieve serial port informationin a C#project. The problem is that i cant make it work. it gives me always the same error. The function returns a win32 error telling me that the parameter is not valid The problem is that i dont know which parameter is th...more >>

Hi! I have no experience in COM interop so I really need some help. I have to reuse some vb.net code in VBA. I made a new class library project where I added a new com class with some public members and methods. After resolving some conflicts, like some Warnings about generic types, I was a...more >>

I am using Microsoft Text Driver with a schema.ini file , is there a way that i can handle UTF-8 Encoded text files, cause the orginal documentation states that it characterset option only supports OEM And ANSI Regards Kerem Kusmezer ...more >>

Could someone take a look at the docs for this method? http://windowssdk.msdn.microsoft.com/en-us/library/system.runtime.interopservices.comtypes.irunningobjecttable.register.aspx In particular, I'm interested in the return value. The docs say it is an HRESULT. However, I sincerely doubt th...more >>

I've an ActiveX made using MFC that has a method that shows a modeless dialog box containing a Tree control (SysTreeView32). This ActiveX is used inside a C++ MFC application and it works fine. When I use this ActiveX inside a C# application the bitmaps associated to each item belonging to the...more >>

Hi, I am getting a problem, I have a Windows app in C# opening Excel and getting 2 workbooks open. During processing I want to switch between the two workbooks to sometimes write to one sheet in workbook 1 and then at another time to one sheet in workbook 2. When I try to activate one or t...more >>

Hi, Is there a list detailing equivalent types in c# for imported dll functions? ie HWND = IntPtr DWORD = Int32 etc. I have been looking at pinvoke.net and there is no consistency between the various types in the declarations (some define HWND as int, some as IntPtr) - all very con...more >>

Hi, I am using tlbimp like this: tlbimp module1.dll /OUT:module1.tlb.dll /NAMESPACE:MyModule1 tlbimp module2.dll /OUT:module2.tlb.dll /REF:module1.tlb.dll Normally this works fine for me, but on a particular machine I get this error: TlbImp : warning TI0000 : Error while importing type...more >>

I'm a newbie to marshalling, what's the best way to call the following C++ function from C#? void foo(const vector<string> name) ? I've tried doing a [DllImport("test.dll"), CharSet = CharSet.Ansi)] public static extern void foo(ArrayList name); but that didn't work. ...more >>

First: I'm no c++ geek, I'm just a newbie in c++ and mostly I work in c#. But now I should work on a wrapper for a c++-library to .net. I've read many articles about C++ interop but no one is talking about wrapping a complete class hierarchy in a native lib. It's only about one class or so (lik...more >>

I want to be able to detect a CD change (along with other removable devices if possible). I have trapped WM_DEVICECHANGE in WndProc but after testing it seems only to work if CD AutoPlay is enabled. Is there a way to trap a device change - native .NET if possible - without AutoPlay enabl...more >>

hi, Maybe, because of extremally hot sommer my searching skills are reduced to zero, but i couldnt find any detailed description of windows services, i would be greatful if You could give me some link... well i'll describe my problem anyway: I have to write windows service, which on timer e...more >>

I'm developing a C# application that creates a scatter/line chart in a PowerPoint presentation. I need to populate the chart's datasheet with 12,000 data points. I can do it one cell at a time, but this approach is far to slow. As far as I can tell, the only other options are to use the P...more >>

Hi, I'm having trouble with a UserControl (written in C# with framework v2.0) that I've made into an ActiveX control. It seems to be OK except for event handling. As a test I use VB6 as the container (I've also tried from C++6 too). If I create the control in VB6 code as follows: Dim Wit...more >>

I have the following atl com object method: CGraph::Test(LONG* size, BYTE** pByteBuf) { *size = 5; *pByteBuf = (BYTE*)CoTaskMemAlloc((*size)); for(int i=0; i< *size; i++) { pByteBuf[0][i] = i; } return S_OK; } I have edited the il for this method: ...more >>

I've added a reference to Microsoft.Office.Excel.dll and used the code from http://support.microsoft.com/kb/302096/ .... C# debugger steps through the code, but Excel never launches. ??? ...more >>

I have some code that performs a comparison and returns an object that implements IHTMLElement: example call: FindElement(HTMLDoc, "msthml.HTMLButtonElementClass"); example method: public mshtml.IHTMLElement FindElement(mshtml.HTMLDocument document, string criteria) { foreach (mshtml....more >>

Hi We are trying to develop an erp solution either using pure ASP.NET or by hosting windows forms in Internet Explorer.Which is the best way to do this ? Are there any samples for complete windows forms solution hosted in Internet Explorer. How does it effect the performance if hosted as w...more >>

If I’m impersonating a network user in my windows application and I open or save a word document using the com interop from within my application am I still impersonating the user in word? ...more >>

apologies in advance if this topic has already been covered, but my search in the newsgroups has yet to reveal the secret formula. I've got a .NET C# application that invokes a classic C++ .DLL using DllImport. I'm working at source level with both .NET and the C++ DLL. The DLL exports no...more >>

I am trying to define a named range in excel through automation. This is the VBA code from a macro that does what I want. I'm trying to define the name range so I can use a ADO connection later to insert data. Range("A1:E1").Select ActiveWorkbook.Names.Add Name:="MyTable", RefersT...more >>

Hi , I'm trying to insert a word file F1 into a word file F2 using the following instruction : Object trueValue = true; Object falseValue = false; Object oEndOfDoc = "\\endofdoc"; Microsoft.Office.Interop.Word.Document nvDoc; nvDoc.Bookmarks.get_Item(ref oEndOfDoc).Range.InsertFile((st...more >>

Hello, I have several vb 6 COM classes that I am trying to call from a vb.net app. The vb 6 classes have the vb 6 error handling (on error resume next, etc) and handle any errors that come up fine. The problem is that when I Call them from the vb.net app these errors that happen inside them, wh...more >>

how to sql parameter passing in c# dotnet 2005 crystal report please give the code...more >>

I'm trying to use DLL created in VB 2005 in VB6 project. I did everything to make it work with late binding. It works when I run compiled EXE and produces an error 'The system cannot find the file specified' on the first line of this code: Dim objXML As Object Set objXML = CreateObject(...more >>

Greetings, Is it possible to pass a COM object from unmanaged C++ to C# (and possibly back?) Say create the object in C++, pass it to - and then invoke it in - managed ..Net? Is yes, what is required in terms of - C++ and C# interface declaration - memory management For this to suc...more >>

Thanks in advance for any assistance. Re-post from C# forum. I've implemented the code found in the KB article below, but nothing is actually printing. I see the document being sent to the printer, but nothing gets printed. I've tried printing to a network printer, as well as the local "Mi...more >>

I created very simple Class Library in VB 2005 (let's call it COMInterop). I set Register For COM Interop property to true to make it accessible by VB6 program. After I compiled it, I got COMInterop.dll and COMInterop.tlb files, I have no problem with using both of them on the machine where the...more >>

I've got a .net function within a comclass project that needs to return an array of strings to a VB6 app. I declare the .net function as Array but what comes back to the VB6 is a text string that says "System.String[]". Any ideas how I can resolve that? ...more >>

Hi all, I'm programming a C# application which invokes a DLL (written in standard C). I have tried many things but any success since the beginning of the weeks. Here is the C prototype: unsigned short GetField ( unsigned short fieldId, char* fieldValue, size_t* FieldSize); This method...more >>

We're C# .NET developers who must use an ActiveX container (not IE) to create and contain our components. We'd like both the component and the client to be C# .NET code. But, it appears that you cannot do this. To do this, the RCW of my client code would have to be able to talk to the CCW of m...more >>

Hello, We have a set of C# classes with their interfaces exposed to COM: MatrixUInt16 : IMatrixUInt16 MatrixUInt32 : IMatrixUInt32 MatrixInt16 : IMatrixInt16 MatrixInt32 : IMatrixInt32 We are moving to VS2005 and these C# classes are excellent candidates for a generic i...more >>

Hey there, I have a C# .NET class that contains some functionality that is used in a hybrid Classic ASP /ASP.NET site (we are doing a conversion to .NET). Part of my class functionality (written in c#) needs to be accessable to VB6 COM objects and Classic ASP pages, but some only needs to be...more >>

I have an exception when i try to open a file (which is located on a shared directory) with dsofile : oDSO = New DSOFile.OleDocumentPropertiesClass oDSO.Open("\\developpement\Doc1.doc", False, DSOFile.dsoFileOpenOptions.dsoOptionDefault) -> Exception from HRESULT : 0x800300FC (STG_E_INVAL...more >>

Hello I have a C++ API method in a COM object: HRESULT GetReason([out] VARIANT* pReason); pReason is a variable created by the C++ and is preferrably (but not always) a BStr. In C# I cannot use UnmanagedType.AsAny since compiler won't allow it in an [out] parameter. A part of the pr...more >>

Hi, I have a large MFC ATL EXE built with C++ 8, and now I am compiling with /clr to enable C++ interop - i.e. accesing .NET components directly in the same executable as the unmanaged code from MFC/ATL. When I compile I get a series of warnings and would like to know if they are of conc...more >>

I tried to make COM callable wrapper (CCW) for SMO using the following command line execution using RegASM.exe After executing the command line RegAsm.exe, I got the following output. ------------------------------------------------------------------------------------------------------ Micros...more >>

Have a VB .Net VS2005 application works fine on development system. The app uses Excel. When I copy app to new computer that has Office loaded get error: Unhandled exception has occurred... Could not load 'Micrososft Office.Interop.Exccel', version=11.0.0.0... The system file cannot find the ...more >>

I'm attempting to call a unmanaged function that returns a char *, something like: mylibrary.c: static char err[256]; char * last_error() { return err; } c#: [DllImport("mylibrary.dll", CharSet=CharSet.Ansi)] public static extern String last_error(); --- (Assume tha...more >>

I have a interesting problem and thought this would the right forum for it. Background: We have created a series of new generation middleware components using ..NET/C#. These components are managed DLLs hosted in a WIndows Services and .NET Remoting is used for alll client comm. to these co...more >>

There was an old thread with this same subject: http://groups.google.com/group/microsoft.public.dotnet.framework.interop/browse_thread/thread/a6f451e1677943c3/06fafc27f869273e?q=mshtml+htmlformelement+events&rnum=1#06fafc27f869273e Which addressed mshtml's inability to bind to a form's OnSubmit ...more >>

Hello, Im trying to fetch a Drop-event, and everything goes fine until I call the "GetData" method. Ive tried both to catch the drop with defining FormatEtc to a CF_HDROP and iterating Formats with "EnumFormatEtc" both returns same error... Im guessing it doesnt like the input of Format...more >>

I have a problem passing a struct with an enum field. I have this c++ code: typedef struct st_mysql_bind { .... my_bool *error; enum enum_field_types buffer_type; .... }MYSQL_BIND; enum enum_field_types { MYSQL_TYPE_DECIMAL, MYSQL_TYPE_TINY, MYSQL_TYPE_SHORT, MYSQL_TY...more >>

I am attempting to attach "onblur" events to all elements in a loaded HTML document within the WebBrowser control. I can successfully attach the event, but I cannot tell which control is firing the onblur. I need some way to get the sender to send itself. Here's my current code: .. .. ...more >>

Hi , Pls help me to solve this problem . /* --this is one of the function in COM component */ int ProjectLIsts(LPCTSTR prj , VARIANT* prj_list) { prj_Lists= { ARRY OF STRUCTERES . ,.ONE STRUCTERES FOR EACH PROJECT } returns TOTAL NUM of PROJECTS } ........... I want to...more >>