Hi, I am trying to use a legacy VB6 Dll in C#. I am able to register for interop in VB.NET and use it, however, when I try to reference it in C#, the Interop Assembly is not being generated and I get an error. Is this because of some of the types in VB6 not being available in C# ?? How do ...more >>

I have a COM interop component that I have written in C#. I register the object with regasm to embed its ProgID and such in the registry. All of my normal .NET classes get registered with it and I don't want them to be registered as COM interop objects. Is there an attribute I can apply to th...more >>

All, I am trying to write a P/invoke wrapper for a method that takes a pointer to a struct that has an array of char* strings. It goes something like this: Unmanaged Method: int unmanaged_foo( Struct1 * s1, const char* class_name, StringSet * instances ) { // ... ...more >>

Hi I am planning to open a software company to develop client-server apps and web applications for my client. Now, i am in a difficult situation to determine what is the best platform i should use to develop the application for my end users. Should I use Java or MS.Net technology or should I mi...more >>

Here is my problem. I have access to existing c# code of an assembly that I want to expose to COM clients. The c# code has elaborate class hierarchy and interfaces so there is no particular class I can expose that will follow rules of COM callable class. So here is what I did: 1. Add a new ...more >>

Is it possible to marshall a structure to the API function CopyMemory? I keep getting the error: "Can not marshal field Address of type WTS_CLIENT_ADDRESS: This type can not be marshaled as a structure field." If I try to specify the marshalling attribute such as <Runtime.InteropServic...more >>

Hi, I am trying to open a excel file from .NET application. I have given reference of Microsoft Excel Object Library 9.0. My application is opening excel object and writing into excel file. Everything is working fine if the file is not already open. But if the file is already open then it...more >>

I am getting error 53, "File or assembly name Microsoft.VisualBasic.Compatibility, or one of its dependencies, was not found", on a machine where I deployed my application. The application is a .NET DLL which exports COM+ interfaces. The .NET Setup project shows the Microsoft.VisualBasic...more >>

I have a COM component in ATL, one of its method's IDL define is as the following: HRESULT SetValue(long a, [in] long* b,[in]string* c, [in]VARIANT* d, [out,retval] ConfirmVal e); here ConfirmVal is a Enum define by IDL. The VC++ client has no problem to call it by using smart pointer as the ...more >>

Please forgive the duplicate posts but I am still looking=20 for an answer to this question. How do I instanciate=20 a reflection discovered enum? Thanks=20 Mark ----------------------------------------------------------- Mattias, This is (I think) interop related because the enum I ...more >>

Hello all, How do i set my 2 pages ssl. I call page2 from page1 by doing a server.transfer("page2") As page2 is ssl i get error as the protocol has to be https. Are there any method to do apart from server.transfer(https://myapp/page2.aspx) Help please Regards, Mathew ...more >>

An HRESULT is defined as the following: typedef long HRESULT; But for COM Interop, functions that return Long values cause my system to crash (and show up as an Unsupported type in VB 6 Object Browser). So what is the proper return value for a function that returns an HRESULT? I was loo...more >>

Some functions of COM components have optional parameters. When imported into C#, the generated functions assume all parameters to be present. Is there any way to call COM functions with optional functions? Thanks in advance. - Jinlei. ...more >>

I'm having a recurring problem which renders a .Net dll useless to the COM clients I am distributing the dll to. The .Net dll has been defined in all of the proper ways. At the assmbly level, I hardcode (with attributes) the GUID of the library and the version of the library, as well as speci...more >>

Hello, I am using late-binding and I am having problems using a COM object that cannot be publicly created. Can anyone help please ? Many thanks Alan ...more >>

Hi I'm trying to use an OCX i wrote in VB6 inside .NET The problem is i can't get ImageList work properly Here's my code to pass ImageList '--------------------------------------------------------------------------- ----- 'Get ImageList '-----------------------------------------------------...more >>

I am in the final stages of development of a .net solution for home health care. Here is the scenario: wrote a simple application that uses a custom dll (not written by me, but from the visual studio 6 days) that passes patient data into a database. The development version runs great on t...more >>

Hello all, We have a document production system based on mail merge documents and related data sources (csv files) from a sql server. This system is to be moved to a asp.net environment. We require the ability to download the templates from the web server, carryout the merge and (if requi...more >>

I have a type library file that came with our ERP system that I am referencing in an ASP.NET application. On my develpoment machine, I have been able to access all of the properties and methods in the object. I am deploying my application to my production web servers and am getting errors wh...more >>

Hi, I have an existing COM dll that I would like to upgrade to vb.net. The problem is that the Com Interop needs to be binary compatible with the existing dll, in effect making any clients compiled against the old DLL start using the new one transparently. If someone could point me in the r...more >>

Hello, I've got a COM object that is being returned to me from a=20 COM method invocation. I don't know the type / COM=20 interfaces of the object returned to me, since this=20 varies between invocations. However, I would like to=20 determine the interfaces of the returned COM object, and=20 ...more >>

Hi, I am having a dll with a function the dll function is char *FindName(char *Name) { //Handle some stuf with name . . char *x = new char[10]; strcpy(x,"ABC"); return x; } if I write .Net Code Like [DllImport("my.dll",EntryPoint = "FindName",CharSet=...more >>

I have a COM component, originally written in VB6, which I would like to = rewrite in VB.NET for performance reasons.=20 I am trying to implement the COM interfaces of the original VB6 = component so that I don't have to change or recompile the clients. = However it appears that VB.NET is unab...more >>

Hi, I have a VB6 .exe project calling a .NET .dll project. After compiling both projects, the programs work fine. However, when I set the breakpoint in VB6 and .NET projects, and tried to debug, the stepping only in the VB6 project, and not able to step into the .NET project. Could any...more >>

Hi all, I'm having trouble wrapping some VC++6 classes in managed classes, and am hoping someone can help me. Here's an example of what I'm trying to do: I have this VC++6 class that derives from CObject, class vc6class : public CObject { public: struct vc6classException {}; vc6...more >>

Hi, I'm using the PIAs. I have a mehod that calls excel that works fine in winForms but the I tried to use it in ASP.NET and I get the error Access Denied right after the following code: Excel.ApplicationClass xlApp = new Excel.ApplicationClass(); Why is this.... What am I doing wrong...more >>

I need to take a User Defined Data Type (UDT) and turn it into a byte array. If I have an UDT defined as: <StructLayout(LayoutKind.Sequential)> _ Public Structure Test_UDT Dim s As String Dim i As Int32 Dim l As Int64 Dim d As Double Dim b A...more >>

Hie all, I am facing a problem...I downloaded code for CEMAPI applications from MSDN for embedded visual C++...... I created an ATL COM library through the wizard in eVC++, used the tlbimp.exe to create a .NET dll, and included that in a .NET compact framework project....i can even see the...more >>

Hi, all! I have already installed .NET Framework CLR on Win 2000, SP4 machine. I installed it from dotnetfx.exe. My .NET application does access to COM and COM+ object and vice versa. All wrapper COM->.NET and .NET->COM should be created during setup process. A problem is , that this pack...more >>

Thanks alot - after removing the "ref" it worked without problems immediately - and I can see 16 MessageBoxes with German Names for the BlockFormats :) :) Thank you again...more >>

I have a class library object that I am using in a COM system. Every time I reregister it with RegAsm I get a new set of CLSIDs for the type library, interface and co class. Is there any way to make these values constant so that they won't change when registered? Any help would be great. ...more >>

I have created a VB.NET dll that will be used by a VB6 executable. I can get it to work, but I have to recompile the VB6 executable whenever I close .NET, reopen it an recompile the VB.NET dll. If that is confusing, let me list the steps I can do to reproduce this problem: 1) Open VB6 ...more >>

Hi, Can anybody point me in the right direction for obtaining my goal. I have a ..NET assembly which I wish to expose to VB6 through the interop using VB.NET. I have started to do this but it is now become a monotonous task, as not all class and procedures need to be exposed. I would imaging ...more >>

Hi, Can someone provide an explanation of the parameters of the following method? I cannot find any documentation for it. void IDocHostUIHandler.TranslateAccelerator(ref tagMSG lpMsg, ref Guid pguidCmdGroup, uint nCmdID) BACKGROUND (for the curious): I have a .NET windows application w...more >>

Hi ! I have trouble with making a call from C# to the method: MSDASC.IDataInitialize.GetInitializationString(object pDataSource, sbyte fIncludePassword, out string ppwszInitString) My intention is to show the dialog "Data links properties" and to read the connection string that is created...more >>

I need to convert this: #define LPSTR_TEXTCALLBACKW ((LPWSTR)-1L) into something c# understands. This is what I came up with: System.IntPtr callback = new System.IntPtr(-1); is this correct? --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http:/...more >>