Hi, We are trying to implement a keyboard hooker for IE using C#. For this we are trying to install a global message hook using SetWindowsHookEx function: mHook=SetWindowsHookEx(WH_KEYBOARD_LL,new KeyboardHookProcDelegate(KeyboardHookProc),((Marshal.GetHINSTANCE(Assembly.GetExecut...more >>

I have a need to create a dotnet class assembly that will be registered as a COM object and called by an ASP page. I've been searching the web, but haven't come across anything great or not to far above my head at this point on accomplishing the above. Any tips? or links to point me in the ...more >>

I am trying to add a worksheet to a workbook. The following code produces an error at the last line: Excel.Application theApp = new Excel.ApplicationClass(); Excel.Workbook theBook = theApp.Workbooks.Add Excel.XlWBATemplate.xlWBATWorksheet); Excel.Worksheet theSheet= (Excel.Worksheet) t...more >>

Hi, I have a non thread safe vendor supplied DLL (probably created/written with Borland C++ Builder). I would like to have multiple threads accessing seperate instances of this DLL, which I've discovered is not possible. What I then embarked on doing was creating a C# assembly (i.e. a DLL)...more >>

Hi, I am using Visual Studio .NET 2003 application in order to get access to a shared folder's contacts. I have "Referenced" the COM library for Outlook 2003. Below you may find a sample code that loops through a specific user's contects. The pronle is that from the 1000 contacts that are...more >>

I'm having a little trouble deploying a .NET DLL, and I was wondering if anyone here could help. Basically, I've built a DLL to expose some .NET components to COM. After building the DLL and running "regasm /tlb" and "gacutil", I can call these components from VB6 on the development machine ...more >>

I have a legacy VC6 application that has an interface object which has functions which return SAFEARRAY's of BSTR, DATE, double, etc. I was able to call these functions from VBA, VB6, etc using standard VB arrays. EXAMPLE: Dim thingArray( ) as String Dim myLegacyObj as LegacyApp.LegacyObj ...more >>

I have a vb dotnet app which calls into a vb6 component class. It passes in 2 byref parameters as soon as I call the class I get a "Type mismatch" error. Here is my code. VB dotnet Dim strSndbxId As String Dim strOverwriteChanges As String dim strCn as string Dim oSF As Object strCn ...more >>

Hello, I use p/invoke to call SHParseDisplayName exposed by shell32.dll and this call returns an address of PIDL that it allocated in unmanaged memory. I am expected to release it. I am confused if I can use FreeHGlobal or FreeCoTaskMem for this purpose. Does it make a difference in this ca...more >>

Hello, I have a client who requires IE to print HTML files. The automation is complete using the above, but now they want to be able to switch printers (not print to the windows default priter, but to a printer specific to a document) Is there a way to set the Printer when using the title...more >>

Hi I am working on Mixed code where a lot of calls are passed on from my Managed wrappers to unmanaged C++ classes. Working on performance I noticed that using PtrToStringChars had a lesser overhead than using Marshall::StringToHGlobalUni. I came to this because I noticed with the declarati...more >>

Hi I know, this post might not be fully suitable for this group, but I didn't find any other good group yet. I'm finding and i'll post it there as well. For now, please guide me. We have a build process which builds our projects (VS 6 and VS.Net) while setting the build numbering same and...more >>

Hello! We have a primary interop assembly for a COM object that is used in our .NET 1.1 projects. Now we are porting them to .NET 2.0. Although .NET 2.0 can use existing PIA assemblies, we can also recreate PIAs using VS 2005 tlbimp tool. However, we need to be able to support both 1.1 and ...more >>

Hello, I am trying to use an Win32 DLL developed using Visual C++ 6.0 in my C# .net application. The signature of the original function is as follows : BOOL __stdcall GetXMLString( const char* strInputFileName, // The input STL or RP file name const char* strPassword, ...more >>

I am building a VB.NET dll browser extension to respond to the click event of a custom button added to IE's toolbar. I am implementing the IObjectWithSite interface to handle acquiring a reference to the browser. And I am implementing the IOLECommandTarget interface in order to receive the ...more >>

Is it possible to expose a .Net USERControl (GUI) to COM so that it can be used by VB6 as if it were a regular ActiveX control. I know you can expose a class library, but what would you need to do when you have a user interface? Thanks...more >>

Hi, I'm using following bridge architecture to connect native 32-bit applications with .NET 32-bit => COMServer.exe => .NET.dll => .NET Destination apps The 32-bit client acts as COM client which calls the (ATL-build) COMServer. This acts as host for the .NET.dll assembly, which exposes...more >>

I'm cleaning up someone else's code and noticed that Marshal.ReleaseComObject is being called on the same objects over and over again in a loop, usually around 500 times. Is this a good design, or should Marshal.ReleaseComObject only be called after the loop has finished and the object won'...more >>

I want to pass back a group of data to a caller. What I am currently doing involves returning a pointer to a struct defined in IDL and available in the TLB. The thing is this gets messy w/ managed .NET code involving messing w/ a System.IntPtr. Will managed code properly release a structu...more >>

I want to be able to have a C# thread invoke a COM method on a different thread. I have three DLL's, B, C, and D. B) C++, unmanaged, COM client, .net client. C) C++, COM server D) C#, COM server 1. From B, I instantiate a coclass defined in C. This coclass uses the FreeThreadedMarshall...more >>

Hello. I have a 3rd party DLL containing an in-process COM object I want to use in my application. However, I don't want to install the COM object on the target machine. Instead I'd rather just put it in my application's folder and use it without registering it. Is there any way to...more >>

I'm trying to call a method in a COM DLL from .net. Here is some unmanaged C++ code that can call the method successfully. I'm trying to do the same in VB.net using a custom interop DLL: DWORD dwSize = MAX_PATH; DWORD dwSizeNeeded; m_pszLogFile = new char[dwSize]; rc = pIDgnExtModSupErr...more >>

Hi I was having an application that uses an ActiveX control, and I wanted to know if I can merge it with any managed dll, so that I can hide the ActiveX control, and I got a firm no answer due to the fact that COM should be registered and added to the COM DB, where the COM loads, .. etc. ...more >>