I have a COM-.NET exception handling problem and I would appreciate your help.
I have a COM server that “throws exception” from time to time (the COM
object implements ISupportErrorInfo and generates IErrorInfo objects upon
errors).

I have written an automation add-in some time ago that merely adds a
few functions to Excel. It has always worked, but now it has stopped!
When used in a cell, I get "#NAME?". When called via VBA it says "The
macro 'sqr' cannot be found".

I have a library file (.lib) which was developed in c++, I need to use this
lib file into .net
Can I convert the lib file into dll or is there any way to use this lib in
.net?

I posted this to m.p.d.languages.vb, but was told this is a better
place to ask (and I worded my question poorly there, so I think I
miss-communicated my question).
What I need to do is send a parameter from VB.net to an Unmanaged C dll

I'm trying to call a .net window using COM, this my .net code:
-------------------------------------------------------------
[ComVisible(true)]
[ClassInterface(ClassInterfaceType.None)]

I am using the API function DNS_Query().  I pass a null pointer to the
function, the function does it's magic and fills pointer with the address of
the first record.
I then read the data at this address into a structre

I have a a custom COM object written in C++ which i need to give a
callback function from C#.
I have it setup passing a delegate to the native code. However, when
the native code calls the callback function the application crashes.

After 1 evening of trying and reading a lot of (web)pages I have not
succeeded in creating a .tlb file (to use in a C# program) from my
msoeapi.idl file. Also I'm a bit
confused because some sources say MIDL.exe makes the type library and some

Has anyone been able to get SHGetFolderLocation to work? i see plenty of
posts about people having problems with it, and one fellow saying it is not
possible to use under .NET.
For me it returns 0x80070057 "The parameter is incorrect"

I am working on a Windows Forms Control Library project which has some
unmanaged code in it. This library will be used in C# Windows
Application. Some of the managed classes have protected unmanaged class
members. They must be reached by other classes inside the Library, but

I want to get the list of adapters for local computer. There is any managed
class ?
I used :
[DllImport("iphlpapi.dll", EntryPoint="GetAdaptersInfo", SetLastError=true)]

Hi - I am reposting to this newsgoup as noone seems to be able to help in
the webbrowser_ctl group...
I am looking to catch scroll events from IE (from within my c# BHO). Getting
odd behavior so far, sometimes it starts to work (logs a few scrolls) then

I'm loading a Class from Assemly DLL using Activator.CreateInstance.
That loaded Class is executed in a worker Thread with no loop.
What actually happends when class is loaded using Activator.CreateInstance?
If I create same class using Activator.CreateInstance many times will

My Code (vb.net scripting)
objExcel = CreateObject("excel.application")
objBook = objExcel.Workbooks.open([filename])
i have the issues as stated below when the code reaches the

Hi, dears!
When I took example of using
CheckTokenMembership() from
http://msdn2.microsoft.com/en-us/library/aa376389.aspx