Hi all, I am trying subclass a window that belongs to another process and catch the WM_CLOSE message and update my process' user interface. Does anyone have any code, pointers to code, or ideas that will accomplish this end? Thanks, Steve ...more >>

I know of a *lot* of people have posted message of this error: COM interop registration failed error. Type library exported encountered an error while processing '***'. Error: Type library export can not load type '*****'(error: Sytem.TypeLoadException: method ****** in **** doesn't have an impl...more >>

I've recreated the SCSI_PASS_THROUGH from ntddscsi.h and then tried to use the Marshal routines to set up the structures and call DeviceIoControl. I always get a failure on the Marshal.StructureToPtr call saying that I didn't pass a real object. Here's what I'm doing: [StructLayout(LayoutKind.S...more >>

I've tried to get an answer to this before in a NG that usually answers so I'd guess it is not common knowledge. The following does work. 1) I'd like to kinow me why String works in this case. Since String can't be changed I thought StringBuilder should be used since I'm looking for a retur...more >>

Can winspool.drv be interopted for a Windows Forms application. The WMI is not bringing back accurate info on status so.... I've got API declares but the API call is very unstable and crashes and brings down the call app. Try catches just don't work. Help! Harry ...more >>

Unable to get the window handle for the 'AxWebBrowser' control. Windowless ActiveX controls are not supported. I am using the active x microsft web browser control. I am using a windows application in c#. I have a form that uses this control and it works ok, then when this new form finishes lo...more >>

Hi all, i have TCP client server application written in C# using async socket methods, eg BeginReceive(), BeginEnd() etc server is continuesly running in the background, client connect to server and recives data from server. If server application shuts down client immedeatly recieves d...more >>

Sorry for the cross post, but I have just realised that this might be a better place for this question. Can anyone suggest how I would marshal a variable length structure back from an API call. Specifically, I am looking at the WaitForDebugEvent function, which returns a DEBUG_EVENT structure....more >>

I wrote an app that transferred data from Excel to Access (Office 2000 on XP Professional). I had it in release form and it was working fine. I installed PIA's to develop another App and now I get an error on the first App informing me of an unhandled Exception of the type "System.InvalidCast...more >>

I've created a project with a web browser control according to KB article 325079 (C#). The BeforeNavigate2 event fires correctly, but I'm not able to prevent the URL's from going into the browser history. I've tried to modify the Flags parameter in BeforeNavigate2 event but that had no effect and ...more >>

Suppose that I have a class in an assembly that is delivered to the user, what can I do to change the class so that it doesn't break the binary compatibility? That is, user application can run with recompiling and relinking. I know that if I define an interface, and only expose the interface ...more >>

I created a .NET (DLL) called DBWrapperNET.DLL. It uses ADO 2.8 for the DB access. This DBWrapperNET.DLL is to be used by multiple VB6 applications. I wanted to "strongly name" this DLL so that it can be shared by different VB6 applications (like we created other DLLs and register them). I am n...more >>

Hi, I have a C++ COM class that I instantiate from VB.NET, but the object never gets released. Is there something that I need to do to force the destruction of the object? Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click Dim Im...more >>

Hello, Here is what I'm trying to do: -- Make sure both MS Excel and MS Word are running -- Create an Excel chart -- Save the Excel file -- Copy the Excel chart onto the clipboard using Ctrl + C -- Go to Word and look under Edit > Paste Special -- Note there is a source reference and an o...more >>

I trying to pass this structure to a dll: <StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Ansi, Pack:=1)> _ Public Structure udtINTER01 <VBFixedString(8), MarshalAs(UnmanagedType.ByValArray, SizeConst:=8)> Public action As Char() <VBFixedString(7), MarshalAs(UnmanagedType.ByValArra...more >>

I'm linking an excel workbook programmatically to a powerpoint presentation via an add-in written in C#. When opening the presentation, I check the document to see if it is the latest version, refresh the object if it isn't, and powerpoint spawns an Excel process that never goes away, which effe...more >>

Hi guys, Here is my problem: I have a C DLL function I need to ccall from VB.Net. long PBFNProcess(void *Reserved1, void *Reserved2, void *Reserved3, void *Reserved4, void *Reserved5, void *Reserved6, void Reserved7, void *Reserved8, void *Reserved9) These are all optional pointers to ...more >>

SHI am trying to use the Shell32 operation FileOperation to send a file to the recycling Bin. I have defined the structure in my class as follows and am hoping my definition is correct. Please let me know if I have it correct: [StructLayout(LayoutKind.Sequential)] internal struct _SH...more >>

Hi, I have a application that I need to create multiple new "iexplore.exe" processes (show more than once in taskmanger) and control them using the shdocvw/mshtml. I am able control Internet Explorer with instances created with the shdocvw. e.g. Activator.CreateInstance(Type.GetTyp...more >>

Hi, I have written a class that intergrates with excel via the com interop in vb.net. Everything is working very nicly, no memory leaks and the excel process comes down gracefully. The only problem I can see myself facing now is that my web app is going to be hitting the excel stuff fair...more >>

Hi, I am having difficulty accesing the member data in a struct. This what I am doing. In unmanaged code typedef struct { char name[20]; int id; } person; In C# [StructLayout(LayoutKind.Sequential)] public class person { [UnmanagedType.ByValTStr, SizeConst=20)] public string ...more >>

The following managed C++ function is called from an unmanaged C++ DLL: double Divide( double num, double denom ) { if( denom == 0.0 ) throw new std::exception( "divide by zero" ); return num / denom; } The caller calls the function within a C++ try-catch block, with the follow...more >>

I have written this code and it worked like a charm without any problem, DirectoryEntry de = New DirectoryEntry(); de.Path = path; de.UserName = userName; de.Password = password; de.AuthenticationType = AuthenticationType.ServerBind; de.RefreshCache(); string myName = "Henry"; de.Propert...more >>

I have written a class library in c# and want to use it in VB6. Everything works fine so far but when I try to assign a value (an array of type defined in c#) to a property definded on the c# side the vb compiler does not want to compile. Reading access to the property is working. I added a func...more >>

This looked pretty simple to me at first, and perhaps it still is, but I havnt been able to find out just what the trick is. Basically the aim is to compile a dll from VB .NET, which can be read using previously written Java code (or anywhere else) which reads and executes the methods within t...more >>

if there is a C function in a DLL(My.dll) has this declaration, struct MyStruct { int a; int b; }; int MyFunc(int param1, MyStruct** param2); how to define this in C# ? if there is another C function like this int MyFunc1(int param1, char** szRtn);, I can define it as [D...more >>

Using EnumWindows as an example. PINVOKE EnumWindows is easy. How do you handle the callback. ++PLS...more >>

Hello! My app has to use externel dll with ANSI C interface. Some of IO functions require passing prehistoric FILE struct as a parameter for any output input operations. I tried to call it with P/Invoke using following code but with no success, the return value from fopen seems to be valid ...more >>

I am having a problem which does not occur on all machines. I have a C# DLL that is being accessed by a VB6 app. After specifying COM interop on the C# project, and also using regasm /tlb on the deployed machine, the VB6 app will only 'find' the C# DLL if it located in the same directory. The C# ...more >>

I have 2 log method overloaded in a VB.Net COM. ____________________________________________________________ Public Sub log(ByVal type As Integer, ByVal msg As String) Public Sub log(ByVal type As Integer, ByVal msg As String, ByVal ParamArray args() As String) __________________________________...more >>

i wanna to use the following code to get the system imagelist ,but it doesn't work well,the value of variable iconCount always equal 5,and so i can't get the correct imagelist. pls help me with the correct method ,thanks! //note :the class SHFILEINfO and enum SHGFI has been defined previously...more >>

Now I want to use RegisterDragDrop method to register a IDropTarget to a panel on my form.Below is my code, when I drag some url link to the panel , I found that the IDropTarget's dragenter method was invoked by drag, but the DragDropEffect always None so the drop method was never invoked. What '...more >>

Can anyone tell me how to Open an Office Document in Visual Basic .NET Thanks in advance... -- Yours, Hazira B...more >>

I'm struggeling to get this stuff into my brain =) Are all of the three declarations valid for the IEnumIDList.Clone metod? The first idea i had was that if I don't need the HRESULT return value I could do it like this void Clone( out IEnumIDList ppenum); Then I got thinking.....more >>

I'm having problems with the IPersistFile interface. We have in house objects that support IPersistFile (and have done for years). I would like to load an object using this interface with VB.NET (note: I'm already successfully using our IPersistStorage interface for structured storage with oth...more >>

Attention all coders, I have posted a job on rentacoder. It is on topic for this newsgroup. If any of you are able to do it, you might as well log on and get paid. Thanks for considering this work request, I am willing to pay for work done and would like to hear from people who can do it. ...more >>

NET Framework Version 2.0 Redistributable Package Beta 1 (x86) CODE COVERAGE EDITION The .NET Framework Code Coverage Edition is a new mechanism that enables you to give Microsoft direct feedback on what portions of the .NET Framework and Win32 you're most reliant on. http://www.microsof...more >>

Can you write this code in a VB .Net application? Or is this code only understood by the VB .Net compiler? Public Sub LateCall( _ ByVal Instance As Object, _ ByVal MethodName As String, _ ByVal Arguments() As Object, _ ByVal ArgumentNames() As String, _ ...more >>

Hello, I am trying to use shared memory mapped files for IPC between two applications, one of which may be in C++ (non .NET envi) As a first step I am trying to get serialization / deserializtion working within a single application and getting exceptions and errors. "Binary stream does not ...more >>

I am looking to do some work using Outlook. This is a link http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnout98/html/msdn_movs105.asp that explains what I am going to do. My question is how do I find documentation for Interop Modules Given the following code, how can ...more >>

Hi All, I am having performance issues with the .NET client calling the Java Webservice running on axis. Have detailed the problem below. Please help. I wrote a webservice in Java. Lets name this WebService1. (using Apache Axis 1.1) Scenario 1: ----------- I have a VB.NET code exposed ...more >>

Is there a way to specify credentials to a network share without using impersonation? I have a backup program that contains a username/password for a target directory to drop zipped files to. The network share requires authentication, however, and I cannot map a network drive. Is there a way t...more >>

C#B - SHARED SOURCE PROJECT FOR A C# Browser Let's sort this stuff out once and for ALL. =============================================================== Anyone who's having problems in the design space "C# WebBrowser Customization" is welcome to join me on...more >>

I have a C dll which interfaces to a voice card. The function call requires a special structure to be passed. I am attempting to wrap the C dll in a C# class so I can use C# instead of C. The C structure is as follows: typedef struct { TCASGroupIndex firstGroupIndex; /* Index of first CAS ch...more >>

Hello, I have a COM interface that looks like the one below (this is a simplied version). IFolder.GetNextItem always returns a subclass of IMyItem. The implemented classes for this typelib are in C# (SDK 1.1), the caller is a Win32 app. When my Win32 class gets a subclass of IMyItem and calls ...more >>

Anyone know how to do this? I have CreateProcessWithLogonW working in my C# app, but I cannot seem to be able to attach a handle to the StdOutput in the STARTUPINFO structure -- no matter what I do, I get a "Invalid Handle" error (Win32 error 6) Here is some code for anyone that is interes...more >>

I have a 3rd party OCX control that I can happily use with VB6. E.g. Private bool As Boolean Private ocx As OCXLib.ocxInterface Private Sub Form_Load() Set ocx = New OCXLib.ocxInterface bool = ocx.Method() End Sub When I try the equivalent in VB.NET using the code: Priva...more >>

In VC++, I have to hardcoded the .net dll's ClassId if i want to create the com instance. How can i get the .net COM's classID without having to create the instance first ? --------------------------------------- #import "Sample.tlb" using namespace Sample; //******NOTE****** const IID CLSI...more >>

I feel rather confuse with the RefreshCache method. Let say I call the method using the following code, DirectoryEntry entry = new DirectoryEntry(); entry.Path = path; entry.Username = userName; entry.Password = password; entry.AuthenticationType = AuthenticationType.None; entry.RefreshCa...more >>

I've an interface with the following method: void Show( [In, MarshalAs(UnmanagedType.I4)] int fShow); void UIActivate( [In, MarshalAs(UnmanagedType.I4)] int fUIActivate); When I call these methods, using this cocde in C#: interopDocumentView.Show(-1); interopDocumentView...more >>