I am writing an app in .NET that makes use of DataSets. Some of my clients will be writting in VB 6.0. Can I pass a .NET DataSet back to a VB 6.0 client? ...more >>

I am an interop newbie. I just received the following code as an idea to exchange XML data between Powerbuilder components via PBNI, the PB native interface and .NET assemblies. I think I said that right. Would the 'dotNetWrapper' as mentioned below just be a class that would then just say deser...more >>

Hi, I have an ActiveX component (.OCX) which I currently use in a IE browser as an embedded object. Now, I need to write a C#.NET wrapper to this OCX so that I can use the OCX in a stand alone application too. I tried a test C# console application to achieve this. In my .NET project I added refe...more >>

Hi all, I got trouble when developing C# pluginable application. I means that I develop a C# program which allows other programmers plugins DLLs into my program based on a standard. For example, my program allows you load your own UI on my application. I need helps from you all. Thanks in adv...more >>

I have a c# windows service and am trying to move files from the PDA to the desktop. I wrote an application as a windows executable that worked correctly and moved the code into a windows service and now it doesn't work. When I call "CeRapiInit()" it just hangs up and doesn't come back. When I ...more >>

Hi, I am not a programmer, but have managed to scrape my way through .net in order to expose the terminal services dll called wtsapi32.dll. I am using tlbimport, but it complains that wtsapi32.dll is not a valid type library! heeellpppp.... thanks in advance, Brianos...more >>

Hello, I am having trouble converting a LOGFONT structure to a System.Drawing.Font object. I'm calling SystemParametersInfo to get the LOGFONT lfntSMCaptionFont from a NONCLIENTMETRICS structure. I seem to be doing this correctly, but when I try to create a System.Drawing.Font object with ...more >>

I am using async delegates to start new threads. Each thread creates an NEW instance of a given COM object (marked Apartment). Why does each thread block on calls to its own instance as long as another thread is using another instance? In other words, why do these threads act as if they are sh...more >>

Hello, I am developing a C# application that needs to interface with email. Specifically, I want to be able to send an email where the UI dialog for the default email client (Outlook, OE, etc.) pops up and allows the user to type in email addresses, etc. When the user hits send, I want the ...more >>

Hello!!! I've got the problem with the subj. In documentation there is reference to UnmanagedType.ByValArray, but that doesn't fit me (the length is variable). I need to marshall these arrays to the C routine in the form of arrays of structs e.g void Routine(PMYSTRUCT pstr, int nstr); //...more >>

hi. i have managed c++ class that wraps an unmanaged c++ dll. the unmanaged c++ dll has a function that recive a struct. what i need to do , so i can create and pass this struct from vb.net to the managed c++ wrapper, and then to the unmanaged c++ dll. hope im clear. ...more >>

I am trying to get hold of inner workings of CCW and RCW concepts... What language are RCW objects developed in? I guess it should be combination of managed and unmanaged C++ and hence VC++.Net..... Similarly, the unmanaged objects (COM Callable Wrappers) should have access to managed types/...more >>

Hi, I made an dll working as a COM in .NET Studio i C#. I can register and deploy it to other machines using regasm my.dll /tlb. However, when I create a setup project in Studio, it does not work even though I set the dll Register Property as vsdrpCOM. COuld some expert please show m...more >>

Hello everybody! I am quite beginner in CSharp, and i have a big problem (perhaps simple to solve??). Here it is: I am coding an ActiveX component with VC++ 6.0. One of the method of this control should dispatch in my Ax Control a bitmap image data passed as an IN parameter as a byte*, or ...more >>

I'm trying to call a powerbuilder 6.5 object in the .NET enviornment. Here's the code: pb=createobject("PowerBuilder.Application.6") pb.librarylist="Your.pbd" pb.machinecode=false (or true) // now we will get pointer to your object yo=pb.createobject("n_your_nonvisual_object") // ... an...more >>

This is an "interop" issue between C# and J# with P/invoke mixed in. Does anyone know if there is an equivalent in C# to the following J# functionality: int myHandle = com.ms.Dll.Root.alloc(obj); int myAddress = com.ms.dll.DllLib.addrOf(myHandle); (there are some bugs in J# compiler ...more >>

I'm new to the ".NET" thing... I get the idea from some of what I read that COM technology no longer has a place at MS' table - cast aside in favor of "managed code" (whatever that is exactly). Is this an accurate perception? If so: COM has been around for a while & substantial investments ...more >>

Hello!!! If I pass a char* pVal in my struct to unmanaged dll, in dll I have pVal = (char*)malloc(strlen("SomeString")+1); strcpy(pVal, "SomeString"); and the struct is returned back to managed code(C#), but there is no "SomeString", but garbage. OTOH if I write strcpy(pVal, "SomeStrin...more >>

I have a VB.NET app which uses excel automation. I reference the Excel object library and have excel installed on my development machine and everything works fine. However when I deployed the app to the production server which does not have excel installed it gives me an error: "Cannot create ...more >>

Hi! I have a method from an OCX with this déclaration: OCX::MyMethod(short FAR* param), param is an input data The Interop (AxImport) translate it to MyMethod(ref short). How can i build param(from a short[]) and transmit it to my OCX. Thanks in advance, XV...more >>

I get this exception when trying to call a func in a dll from some c# code. An unhandled exception of type 'System.EntryPointNotFoundException' occurred in HeapView.exe Additional information: Unable to find an entry point named testFunc in DLL FileParserCPPWrap.dll. //-------------...more >>

I'm importing AccessibleChildren from oleacc.dll like this: //STDAPI AccessibleChildren(IAccessible* paccContainer, LONG iChildStart, LONG cChildren, VARIANT* rgvarChildren,LONG* pcObtained); [DllImport("oleacc.DLL", CharSet=CharSet.Unicode, SetLastError=true, PreserveSig=false)] public sta...more >>