Hello, I must use an array of variants to pass to a COM method. So i create an IntPtr and i use GetNativeVariantForObject() which works well for the first variant because i created a very large buffer. I do not know the size of a Variant, so i can't copy the others variant. What is the ...more >>

Hi, I am developing COM addins for Word and Excel. To work with these office applications my project has references to the corresponding COM objects (Microsoft Word 11.0 Object Library, for instance). Recently I started using a second computer for development. After having copied my proj...more >>

Here is the overview: I have a presentation layer (it can be an web page or a windows form), a Business Layer where business rules are enforced and a Data Layer which knows about the physical data store. The business layer does not know anything about the physical data store, and all it wa...more >>

Hello, so I have an unmanaged dll c++ , which need a persistent pointer to a struct defined outside the dll , the dll keeps this pointer all along the life of the application. I use the c++ dll in a managed c# application where I initailize the struct, and where I pin its memory to pre...more >>

As I understand, there are ways to 'hook' into the CLR to aid in resolving assembly locations and other features. In a similar vain, is there a way to 'hook' into the CLR to be involved in Exceptions/Errors being returned to the unmanaged world from a .NET component being used through the...more >>

Hi, I'm developing an Managed C++ class library on top of a C++ static library. The managed C++ library will be used as a wrapper by others C# apps. How can I convert a managed array of bytes (Byte xxx[]) to an UCHAR* pointer inside the managed C++ class? Thank u in advance, Marco ...more >>

I am planning to use PDF as a final report so that users can save what they have entered in the asp.aspx form to their own hard disk. Is there a component or control that will handle this ? I donot wish to use Crystal Report nor SQL Report. All I need is: when the use presses the "Print" bu...more >>

Hi I wrote a Cshartp windows applicaiton which will use Win 32 dll by platform invoke. I want to debug the C# application when ever it is calling unmanaged functions i want to step into the function and debug the unamnaged code. I have the Win32 dll source code How can I step into the unman...more >>

I've got a vb.net application that's using: Private Declare Function capGetDriverDescriptionA Lib "avicap32.dll" (ByVal wDriver As Short, _ ByVal lpszName As String, ByVal cbName As Integer, ByVal lpszVer As String, _ ByVal cbVer As Integer) As Boolean and... P...more >>

Hi all, Once in the below sub and gets to the do loop, it seems this line If (GetQueueStatus(QS_ALLEVENTS)) Then does not work? I'm pressing keys but nothing. please help Private Declare Function GetQueueStatus Lib "user32" (ByVal fuFlags As Long) As Long Private Const QS_HOTKEY ...more >>

Hi, I have a DLL that has a C++ class exported. Is there any way that I can use this class in a C# program? I know about the COM interop but this class isn't a COM class. I also know about accessing functions in DLLs using the DllImport attribute but I don't think that imports classes (or ...more >>

Hi, I'm trying to access listview control in a VB application from C# application. Follwoing is my code StructLayoutAttribute(LayoutKind.Sequential)] public struct LV_ITEM { public UInt32 mask; public Int32 iItem; public Int32 iSubItem; public UInt32 state; public UInt32 stateMask; pub...more >>

Hi, i have a "c# call back" called by c++ code. this call back has an array of string as parameter, how do i do the marshalling ? i try this but it does'nt work !!! thanks for answers. c++ code (MYLIBDLL.dll) : ---------------------------------------------------------------- extern "C" {...more >>

We have a C# application that is using the Excel object model via Interop. The code below works fine for an existing workbook, ie one that you have opened up (or saved), but if you open up Excel, click the New button, enter some data and then run the program below, an Exception is thrown: ...more >>

Hi, I wanted to thank Mattias and Peter for their continued quality and fast response! I truly appreciate their work! -- Thanks in advance, Juan Dent, M.Sc....more >>

Hi. I am developing a solution in Visual Basic .NET for creating tables on the fly in Word documents. The development is done on a machine with XP and Word 2002. The code is supposed to run on a Win 2000 Server with Word 2000. The problem is that it works on my machine but not on the server...more >>

Hi: I need a trace tool to see what functions are being called from my program to a dll, I know that FlexTrace does that but I don't want to write the symbols trace file, and I don't have all the Dll functions. There out there a tool that can hepl me to see what functions in a dll is bei...more >>

Help! I have a VB.Net dll that must be exposed to COM. The VB.Net program calls a C++ With managed extensions dll. When I try to reference the VB.Net dll from another VB.net program I get the following error message: Unable to emit assembly: Error emitting 'System.Runtime.InteropServ...more >>

I am using the article http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B821769 for basis of program to change the owner of a printjob. However when I use this Microsoft supplied step by step sample my application has a memory leak, the application keeps on consuming more and more ...more >>