I'm successful in using EM_SETCUEBANNER to set the banner text for an edit control, but I can't seem to retrieve the text using EM_GETCUEBANNER. I'm using the following SendMessage call: [DllImport("user32",CharSet = CharSet.Unicode,SetLastError=true)] private static extern bool SendMessag...more >>

__declspec( dllexport ) char* sGetBarcodes(char* comPort, long deviceName ) The above function is in a .DLL. How to write a wrapper in C#? Thanks. Chester...more >>

Hi, I'd like to start a modeless managed form from an MFC dialog using interop, make sure that the MFC dialog is the form's parent and that the form's style is popup as opposed to child. If I only use Form.Show the form pops up but its parent window is the desktop. To attach the form to the MFC...more >>

Hi all, I have a problem to communicate with serial port(COM3:). I am able to open the handle but cannot send any data. 1. I connected my motoroala handset to PC through datacable. 2. I installed valid driver to detec the motorla(V400) handset 3. I tested the handset through Hyper...more >>

I already saw this question passing by in the news group, but I could not make up answer from it. I have an object say TestObject that has a public method (only to explain the problem): class TestObject { private ArrayList mAL; public TestObject() { } public Arr...more >>

Symptoms: Building a .NET 2003 solution with "Register for COM Interop" set to TRUE causes the error [...can not load required library MSCOREE.TLB] My Cause: I installed SQL Server 2005 beta, which installs .NET Framework 2 BETA. I later uninstalled 2005 and Framework 2.0 Beta, and it left re...more >>

Hi all, I want to register a shell extension that displays some different icons (depending on the bitrate) for .mp3 files. I think that using IExtractIcon is the right way. Here is my interface definition and the implementation (I've copied winamp.exe to c:\ for testing purposes only, of co...more >>

Dear Viewer I am writing DataTable into an Excel Sheet. While writing the DataTable row into an Sheet Range...following exception occured. ----------------- Exception ----------------- System.Runtime.InteropServices.COMException (0x800A03EC): Exception from HRESULT: 0x800A03EC. at Syste...more >>

I have an object written in traditional C++ COM, it is an Apartment threaded object, this aggregates any number of other COM objects, written in any language capable of implementing COM. I have encountered marshalling problems when one of the COM objects being aggregated is written in .NET, li...more >>

Please HELP!! I have a C# component calling Excel COM objects via interop and I get a 'Bad variable type' error under Windows 2000, but NO error under Windows XP. Anyone have a solutiuon to this?? I googled and found some old links here and there where people have asked the question, but...more >>

Hi, We have developed a web application, which uses Interop.Word.dll to read from word documents and write to word documents. Problem is that our client is persisting that we develop the solution in such a way that the app can be deployed in a machine where Office is not installed! I rea...more >>

I have created a C# user control which is deployed from an MSI stuffed in a signed cab file. This control extends UserControl and is registered for interop. The control installs and displays but brings up the windows "Control not marked safe for scripting" message box. I have read zillions of...more >>

I would like to open a password protected Word in Web Browser control in vb.net without prompt user to enter password and only set it in ReadOnly mode. Is it possible to do so? Can anyone help? Many Thx! Lina...more >>

Hi, This is what I want to do: I want to develop a .NET Windows Control, expose the control as an ActiveX and host the control from a VB6 form. The control has to expose a MyEvent event. It should be possible the VB6 form to register the interest in the MyEvent event. This is what my po...more >>

Hi there, i have the following problem with a 3. party dll: c++ function with the following structures: typedef struct { uint16 szUserId[ID_SZ_SIZE]; // null terminated 23 char User id for this user - should be unique } ts_USER typedef struct { uint32 uiSizeBytes; // size in bytes pf en...more >>

I have a Visual C++ 6 MFC app which uses .NET COM (built with 1.1) objects. I have installed .NET 2.0 beta and now I find that CoCreateInstance crashes when trying to create the .NET COM objects. This is extremely easy to reproduce: 1) Install 2.0 beta. 2) Create an MFC Win app with VC++6. ...more >>

Hello, I have a COM AddIn written in C# that I compiled and built on a Windows 2000 / Office 2000 machine. Now, after installing it on a Windows XP / Office XP machine, when the application tries to register a delegate for the Explorer 'Close' event, I receive the following error: Met...more >>

I've got a memory leak problem with my Stack in a class I created for Serial Port Communication. I've narrowed it doen to a subclass I created to monitor the Win32 events fired for the Serial Port (Using WaitCommEvent). The "Status" subclass allocates unmanaged memory for the Event Handle an...more >>

Hi, I have an application in which the VB6 code will call .Net component. Does anybody know how to register the .net dll, I have to create an install kit. Thanks in advance. ...more >>

Hi, Was wondering if somebody could help. I recently saw an article on MSDN http://msdn.microsoft.com/msdnmag/issues/03/03/WindowsForms/default.aspx which talked about using Controls created in managed .NET int VC7. The examples appears to work!! I am now trying to get this to work withi...more >>

Hello All, I have a COM AddIn written in C# for Outlook and it is not releasing the host Outlook application. I set all of my application-related variables to null, I have the IDispose interface implemented in both my Outlook class as well as the Connect class. I have decremented the cou...more >>

Hi All, I'm developing a C# mdi application and we want to reuse some OCX that are already used by my company for some years, these OCX's are used in another application (a C++ MFC application) and are working fine. For C# I'm using reflection in order to load the OCX (to be more precise ...more >>

Hello, I am attempting to create an Outlook COM AddIn that works with Outlook 2000 and later. It appears that I must cast certain events in order to do so. I found code similar to my example below: ((Outlook.ExplorerEvents)this.ActiveExplorer).Close+=new Outlook.ExplorerEvents_C...more >>

How can I using interop (C# or VB.net) 1) Get a list of reports in an access database 2) Programatically change the "Control Source" of a report. ie. perform a search and replace - eg. CustName becomes CustomerName. I know how to get a list of tables (dao.TableDef) and queries (dao.QueryDef...more >>

Hi I am trying to implement a COM interface, defined in a Type Library, in a VB.Net COM Class. At this point it is a proof of concept project and I am trying to use the minimum amount of code but I have to implement the interface MyTypeLib.IInterface1. In the implemented interface is the ...more >>

Hi all, I can't get the GetWindowText API to work right... here is what I have: namespace Win32Api { [DllImport("User32.dll")] Int32 GetWindowText(Int32 hWnd, StringBuilder* lpString, Int32 nMaxCount); } class::function(Int32 returnHwnd) { StringBuilder* windowTextBuilder = new St...more >>

Hey All, Does anyone know how to do the following in C#? I've tried using the "GetType().ToString()" method and it only returns "System._COMObject". ' The objOutlookItem is of type object because the selection object ' may contain multiple types of items (i.e. AppointmentItem, Mail...more >>

I have been using CoMarshalInterface and its reverse in C++ to convert a COM interface pointer to a string that I could pass to an ActiveX control, and also to pass an interface back from the control to my C++ program. (The reason is to do with limitations of ActiveX control access under the ...more >>

I am reading an Excel worksheet using the Excel interop library into a C# program with the intent of putting the value into a SQL database. The value the app receives is in the internal Excel numberic format that represents the date. I can not find any documentation that tells me how I can conv...more >>

Hi, I have C# class that I am trying to convert a string array to a com variant using the GetNativeVariantforObject method using the following code: using System; using System.Windows.Forms; using System.Security; using System.Security.Principal; using System.Web; using System.Web.Security...more >>

Hello, I have created an Outlook Add-in that works great from the sample here: http://support.microsoft.com/default.aspx?scid=http://support.microsoft.com:80/support/kb/articles/q302/9/01.asp&NoWebContent=1 Now what I want to do is catch some sort of GotEMail or InboxChanged event. Basica...more >>

I have a managed C# COM object that I currently use fine with an ASP web page. I want to call it from a legacy piece of C code. Does anyone have a REAL example of how to call CoInitialize, CoCreateInstance, etc from C (not C++)? Any info on how to generate .h files from c# would be great. Tha...more >>

I'm a p/invoke newbie, so please forgive my ignorance if I say anything dumb. I have a C++ function that returns a char*. char* foo() { char* buffer = new char[6]; strcpy(buffer, "hello"); return buffer; } As I want to call it from C#, my C# code looks like: [DllImport ...] p...more >>

Hello, I would like to return a .NET array of strings to Javascript, but it fails ! I tried this [return:MarshalAs(UnmanagedType.SafeArray, SafeArraySubType=VarEnum.VT_BSTR)] public string[] MyArray() { string[] values = { "123456789" }; return values; } I also tried this [ret...more >>

Hello: I am trying to learn how to implement a COM server in C#. I have a simple server written and it works fine from a Delphi client ( which is what I need ). However, I can't find the attribute to set on the C# server to set it to single instancing. It appears the default behavior is ...more >>

Hi, Just a simple question : I have a managed C++ dll; I want to use it in a C# application. So I added : #using MyAssembly.SubAssembly; (which is the assembly in the DLL) But when I want to use my class : MyAssembly.SubAssembly.Klass, I need to put all the namespace and the class name ...more >>

Hey All, I'm trying the following and it is failing with an error about unable to complete the casting operation: this.OutlookApplication=(Outlook.ApplicationClass)OutlookInstanceApp; this.OutlookApplication.ApplicationEvents_Event_Quit+=new Outlook.ApplicationEvents_QuitEventHand...more >>

Our system has a component that imports the MSVBVM60.dll typelib to make use of a VBA Collection object. We are attempting to make interop assemblies for all components and sign them and make them PIAs. I have seen random postings that a PIA does not exist for the MSVBVM60.dll, but wanted to...more >>

I'm trying to read from and write to a physical address, something like: byte COM2 = 0x2F8; byte[] buffer = new byte[] {2}; WriteToAddress(COM2 + 4, buffer); .... byte[] input = ReadFromAddress(COM2 + 6); .... I have to develop some code to read and write from the COM port, but I'm unab...more >>

Hi, I have an application that is trying to retrieve a COM object from a remote instance of itself. The app is written in unmanaged C++ and uses COM. The remote communication goes through managed code via COM interop so that it can use .NET remoting. So here is what happens: 1. COM c...more >>

Hi, I'm working on my first non-trivial windows app in C#/.NET (I've done stuff previously in C++/MFC and C/SDK before that). This app utilizes the Microsoft Virtual Server COM API object. The MVS COM API documentation states: "Programs using the Virtual Server COM interface should initi...more >>

hai, What is meant by virtual Class in C#. -- Message posted via http://www.dotnetmonster.com...more >>

hai, How to trace errors in SQl Server StoredProcedure. Thanks For help anybody, Sai -- Message posted via http://www.dotnetmonster.com...more >>

Hello all, I would like my application to receive messages that are sent to other applications (not owned by myself). For example, is it possible to intercept a WM_PAINT message sent to a different application? If so, any guidance/example code would be greatly appreciated. Thanks!...more >>

Hi. It's my first try using a .NET DLL from a VB6 client. I've managed to build the test DLL with the Configuration setting "Register for COM Interop" selected. I see the DLL listed in VB6 References. I can also instantiate the DLL in VB6 but I don't get any intellisense. Oddly, it works...more >>

Hi, I used the WebBrowser-Control to display some special websites containing frames. How can I force the WebBrowser to refresh/reload a particular frame, but not the whole page? Thanks in advance for every answer. Andreas ...more >>

Hi guys, I have been following the .NET as a COM server tutorial at: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/csref/html/vcwlkcominteroppart2cservertutorial.asp The example fails with the .CoCreateInstance method returning a value of -858993460 to the hr value. ...more >>

Hi All I am creating a Windows Service application that uses some COM objects and I noticed that there is a problem with creating instances of COM objects. I have basically something like this: try { MSXML.DOMDocument xml = new MSXML.DOMDocumentClass(); } catch (System.Exception e) {...more >>

This has got to be some small dependancy...I built an ATL com dll on windows XP w/ .NET 2003 and it won't register on a machine w/out the ..NET framework. Any ideas???? Thanks, Elizabeth ...more >>

Hello, i try to use late binding for office automation with powerpoint and c#. I found some examples for word which work fine: Type comType; object comObject; comType = Type.GetTypeFromProgID("Word.Application"); comObject = Activator.CreateInstance(comType); object o = comType.Invok...more >>