interop

I've got a C# program that needs to pass a char buffer to an unmanaged function. I've found two ways that seem to work reliably, but I'm not sure which I should choose. Here's the unmanaged function's signature. extern "C" __declspec(dllexport) int getNextResponse(char *buffer); The first option is to define the buffer as a StringBuilder, as follows. //at class level... [DllImport("mydll.dll")] static extern int getNextResponse(StringBuilder buffer); //in main method body... StringBuilder sb = new StringBuilder(" ", 65536); int rc = getNextResponse(sb); This is simple, and it works, and I

I am receiving a COM Exception when trying to hook into an event on a COM Object. Here is the code I am trying to execute. COMClass a = IComClass as ComClass; a.SomeEvent += new SomeEvent_EventHandler(MethodNameHere); Line two throws an exception of type COMException with the following information: System.Runtime.InteropServices.COMException was caught Message="Exception from HRESULT: 0x80040202" Source="mscorlib" ErrorCode=-2147220990 StackTrace: at System.Runtime.InteropServices.ComTypes.IConnectionPoint.Advise(Object pUnkSink, Int32& pdwCookie) Does anyone have any ideas why I am unable to

There is a native function: int sqlite3_config(int, ...); I would like to PInvoke to this function. Currently, I have this declaration: [DllImport("sqlite3", EntryPoint = "sqlite3_config")] public static extern Result Config (ConfigOption option); (Result and ConfigOption are enums of the form enum Result : int { ... } .) I am actually only interested in the single parameter version of this function and don't need the other args. Is this correct? I am also curious as to how you would declare the two argument form (perhaps it would take 2 IntPtrs?). Shay Erlichmen You need to use the __arglist

I would like to pin an array of .NET objects (including the objects) in order to allow a native function to do some processing on the objects. As far as I understood, GCHandle.Alloc() does not allow me to do this, because such an array contains references (and the objects might also contain references) which are not blittable. Is there any other option to achieve this? I would be okay with very hack-y suggestions or ones that require Mono. Arrays in .NET are represented in contiguous memory. So that means that in memory, after element 0, element 1 will come directly after the previous element,

I have time based tests to run that require changing the system time multiple times during the test. I want to be able to resync the time to the domain controller time at the end of the test. I there any way to do that using .NET code (C#). I am changing the time using the p-invoke function found in: Set time programmatically using C# Thanks One easy way would be to launch a process and run the NET TIME command (copied from http://blogs.msdn.com/sanket/archive/2006/11/02/synchronizing-machine-time-with-domain-controller.aspx ) using System; using System.Diagnostics; class Program { static void

Any ideas why the following code does not exit the Outlook 2007 process created via COM interop? Microsoft.Office.Interop.Outlook.Application app = new Microsoft.Office.Interop.Outlook.Application(); var item = app.Session.OpenSharedItem("C:\\test.msg") as Microsoft.Office.Interop.Outlook.MailItem; string body = item.HTMLBody; int att = item.Attachments.Count; (item as Microsoft.Office.Interop.Outlook._MailItem).Close(Microsoft.Office.Interop.Outlook.OlInspectorClose.olDiscard); System.Runtime.InteropServices.Marshal.ReleaseComObject(item); (app as Microsoft.Office.Interop.Outlook._Application

I have a legacy VB6 component that I've imported into VS using tlbimp.exe to generate my interop assembly. The VB6 component defines an event that allows me to pass messages within VB6. Public Event Message(ByVal iMsg As Variant, oCancel As Variant) I would really like to be able to raise this even in my C# program, but its getting imported as an event, not a delegate or something else useful. So, I can only listen, but never fire. Does anyone know how to fire an event contained within VB6? The C# event looks like [TypeLibType(16)] [ComVisible(false)] public interface __MyObj_Event { event _