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RE: Struct w/ VARIANT Marshalling Posted by Michael at 4/25/2008 10:41:10 AM I discovered one other significant weird thing.
If I don't populate my VARIANT with the BSTR, I don't see the callback firing.
mj
From http://www.developmentnow.com/groups/viewthread.aspx?newsgroupid=21&threadid=1053880
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RE: Struct w/ VARIANT Marshalling Posted by Michael at 4/25/2008 8:36:37 AM Hi Willy,
Question about your code snippet. You pass in the SpecialType into the C# callback and on the C# side, you do a GetObjectFromNativeVariant on the IntPtr that's passed into the callback.
Is this correct? Don't you need to unpackage the SpecialType first before you do any GetObjectF...more >>
Re: Struct w/ VARIANT Marshalling Posted by Willy Denoyette [MVP] at 4/24/2008 4:06:37 PM "Michael" <michael.jaskiewicz@gdc4s.com> wrote in message
news:5fab30dd-9a42-4d05-a85e-0cd556ae4f88@developmentnow.com...
> Hi, I've been banging my head against this one and now I'm about to
> scream. Any suggestions appreciated. I've scoured the net too and for some
> reason all suggestions...more >>
Error HRESULT E_FAIL has been returned from a call to a COM compon Posted by apalma at 4/24/2008 2:18:01 PM Hi, I'm trying to use the AIM (aol IM) library to send messages to
subscribers in my app.
The problem is the following. I succeded sending messages from a desktop
app. But when I tried to do exactly the same from a win service, I got the
above exception.
I think is a security issue. Any ...more >>
RE: Struct w/ VARIANT Marshalling Posted by Michael at 4/24/2008 12:54:55 PM Another little tidbit. If I replace the VARIANTs in the struct, everything marshals over just fine.
mj
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Class in mixed mode project inheriting from class in unmanaged project? Posted by Chris Ashley at 4/24/2008 7:28:23 AM I need to implement callbacks from methods in an unmanaged DLL to a
mixed mode DLL. I'm having trouble finding examples on how to do this
and all the examples I find seem to revolve around interactions
between managed/unmanaged classes in a single mixed mode DLL.
Is it possible for me to defin...more >>
RE: Struct w/ VARIANT Marshalling Posted by Michael at 4/24/2008 5:42:11 AM A little bit more on this one. I'm looking at the address of the SpecialStruct in C++ and in C# and the addresses are identical.
At least the pointers are making it across okay. For some reason the marshalling from Ptr to Structure is bombing out.
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In 64-bit Windows Vista, the class object registered by a 64-bit L Posted by PAsp at 4/24/2008 4:25:00 AM We have a .Net application that registers as a LocalServer32 in the registry
during installation. That is, it sets the registry entries
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{our CLSID}
\LocalServer32 = {full path to our exe}
\ProdId = {our prog id}
When the application start...more >>
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Re: Struct w/ VARIANT Marshalling Posted by Willy Denoyette [MVP] at 4/24/2008 12:00:00 AM "Michael" <michael.jaskiewicz@gdc4s.com> wrote in message
news:1005055f-8af3-4a16-98d2-89c4baaa8b0d@developmentnow.com...
> Another little tidbit. If I replace the VARIANTs in the struct, everything
> marshals over just fine.
> mj
>
> From
> http://www.developmentnow.com/groups/viewthrea...more >>
Struct w/ VARIANT Marshalling Posted by Michael at 4/23/2008 6:53:03 PM Hi, I've been banging my head against this one and now I'm about to scream. Any suggestions appreciated. I've scoured the net too and for some reason all suggestions don't work.
I've got a C++ app that takes a function pointer from a C# application (it's for a callback). The callback signature lo...more >>
Re: Problem with COM interface using IntPtr... Posted by Willy Denoyette [MVP] at 4/23/2008 1:49:44 AM By marking an interface or method as 'local', you are explicitly stating
that this as a non remote-able interface or method, that means that the
interface or method cannot cross thread/apartment boundaries. So, what you
need, is to make sure that your component lives in the same apartment as ...more >>
Re: Problem with COM interface using IntPtr... Posted by theunissen@comcast.net at 4/22/2008 4:15:11 PM I figured it all out. Please read:
In order to have an interface display "as IntPtr" inside Visual Basic
one should define the parameter as HANDLE or void* inside the IDL
file. We already seen this. In addition,
to avoid the IDL compiler warning one should use "Local".
Now there is a proble...more >>
Problem with COM interface using IntPtr... Posted by theunissen@comcast.net at 4/22/2008 9:51:53 AM Hi,
This message is related to a problem I posted a few days ago:
http://groups.google.com/group/microsoft.public.dotnet.framework.interop/browse_thread/thread/4d243fe978432c06/37881b961489f153?hl=en&lnk=st&q=Visual+Basic+X64+COM+parameter#37881b961489f153
I had a problem where INT"_PTR" in...more >>
Re: COM interface requires Integer in VB, even though INT_PTR is defined in COM interface Posted by theunissen@comcast.net at 4/22/2008 8:54:42 AM Hi,
This message is related to a post I did a few days ago. I had a
problem where INT"_PTR" in a com interface didn't show up as "IntPtr"
inside Visual Basic. This problem was resolved by using a "HANDLE" or
"void*" inside the interface definition in the IDL file. To use the
"HANDLE" definit...more >>
AccessViolationException when sinking managed event in unmanaged C Posted by UrK at 4/21/2008 6:04:02 AM I am trying to sink event thrown by managed code in C++. When the event is
thrown the control never reaches unmanaged client. AccessViolationException
is raised in managed code at System.RuntimeType.ForwardCallToInvokeMember. I
am fighting this issue for a long time now with no effect at all o...more >>
Re: executionEngineException Posted by Willy Denoyette [MVP] at 4/20/2008 7:40:25 PM "JB" <JB@discussions.microsoft.com> wrote in message
news:6FB73C54-66E7-4C34-85B7-4946D6CCC44D@microsoft.com...
> Stand down
>
> I changed the registration of the .ocx from
> Threadingmodel = Apartment
> to
> Threadingmodel = Both
> and that fixed the problem
> --
> JB
>
No, this is ...more >>
RE: executionEngineException Posted by JB at 4/20/2008 9:58:00 AM Stand down
I changed the registration of the .ocx from
Threadingmodel = Apartment
to
Threadingmodel = Both
and that fixed the problem
--
JB
"JB" wrote:
> Vb.net app with COM control. The COM control is an object framer used by
> the vb.net app to treat other apps( eg. word)...more >>
executionEngineException Posted by JB at 4/20/2008 9:20:01 AM Vb.net app with COM control. The COM control is an object framer used by
the vb.net app to treat other apps( eg. word) as embedded objects. Generally
this all works fine. One of the functions of this COM control is to search
embedded app data for text ( 'Find' this or that.) This also wo...more >>
Re: Can not load 'ssleay32.dll' using DLLImport Posted by deepaknawathe at 4/19/2008 11:11:01 PM The issue was due to the exptecte version of 'ssleay32.dll'. I downloaded the
latest version of 'ssleay32.dll' which was for Windows Vista and not for
WinXP. The issue is resolved now. The dll is loaded properly.
"Adam Root" wrote:
> Willy's right, from a security stand point.
>
> But...more >>
RE: How to register an app to the scanner events using VB.NET or C Posted by BuzzLightyear at 4/19/2008 8:02:01 AM using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
namespace STILLIMAGE
{
class program
{
[DllImport("kernel32.dll")]
static extern IntPtr GetModuleHandle(
[MarshalAs(UnmanagedType.L...more >>
Re: COM interface requires Integer in VB, even though INT_PTR is defined in COM interface Posted by Jeroen Mostert at 4/19/2008 1:30:26 AM theunissen@comcast.net wrote:
> It seems HANDLE is not supported in IDL.
>
> The IDL compiler complains and says:
>
> error MIDL2139 : type of the parameter cannot derive from void or void
> * : [ Type 'HANDLE' ( Parameter 'nBinArrayAddress' ) ]
>
> Not sure what to do.
Oops, sorry abo...more >>
Re: COM interface requires Integer in VB, even though INT_PTR is defined in COM interface Posted by Jeroen Mostert at 4/19/2008 12:13:27 AM theunissen@comcast.net wrote:
> I have a small problem. I have defined some interfaces in a COM dll,
> and have defined some parameters in these interfaces as INT_PTR. I
> thought that when I import the COM dll in Visual Basic.NET that I can
> use IntPtr as the type for these parameters, but the...more >>
Re: COM interface requires Integer in VB, even though INT_PTR is defined in COM interface Posted by theunissen@comcast.net at 4/18/2008 4:43:57 PM On Apr 18, 4:30=A0pm, Jeroen Mostert <jmost...@xs4all.nl> wrote:
> theunis...@comcast.net wrote:
> > It seems HANDLE is not supported in IDL.
>
> > The IDL compiler complains and says:
>
> > error MIDL2139 : type of the parameter cannot derive from void or void
> > * : [ Type 'HANDLE' ( Param...more >>
Re: COM interface requires Integer in VB, even though INT_PTR is defined in COM interface Posted by theunissen@comcast.net at 4/18/2008 4:21:03 PM On Apr 18, 3:26=A0pm, theunis...@comcast.net wrote:
> On Apr 18, 3:13=A0pm, Jeroen Mostert <jmost...@xs4all.nl> wrote:
>
>
>
>
>
> > theunis...@comcast.net wrote:
> > > I have a small problem. I have defined some interfaces in a COM dll,
> > > and have defined some parameters in these inter...more >>
Re: COM interface requires Integer in VB, even though INT_PTR is defined in COM interface Posted by theunissen@comcast.net at 4/18/2008 3:26:00 PM On Apr 18, 3:13=A0pm, Jeroen Mostert <jmost...@xs4all.nl> wrote:
> theunis...@comcast.net wrote:
> > I have a small problem. I have defined some interfaces in a COM dll,
> > and have defined some parameters in these interfaces as INT_PTR. I
> > thought that when I import the COM dll in Visual Ba...more >>
COM interface requires Integer in VB, even though INT_PTR is defined in COM interface Posted by theunissen@comcast.net at 4/18/2008 2:22:26 PM Hi,
I have a small problem. I have defined some interfaces in a COM dll,
and have defined some parameters in these interfaces as INT_PTR. I
thought that when I import the COM dll in Visual Basic.NET that I can
use IntPtr as the type for these parameters, but the intellisense
shows me that t...more >>
RE: How to register an app to the scanner events using VB.NET or C Posted by Adam Root at 4/18/2008 1:59:08 PM Nah, I'm running Vista, too.
Send me your code.
Adam
"BuzzLightyear" wrote:
> I tried any possible path with quotes, without, with the final backslash,
> with the initial one, but nothing seems to work...
> I had a look at the registry, under StillImage\Registered Applications
> The ...more >>
RE: How to register an app to the scanner events using VB.NET or C Posted by BuzzLightyear at 4/18/2008 3:52:01 AM I tried any possible path with quotes, without, with the final backslash,
with the initial one, but nothing seems to work...
I had a look at the registry, under StillImage\Registered Applications
The other apps have standard paths... I even tried adding the entry
manually, but it doesn't work....more >>
RE: Passing bitmap back to COM based application Posted by Adam Root at 4/17/2008 4:42:01 PM Your C++ code is passing a by ref argument (&HBitmap) and your C# code is
passed a by value argument.
I see you found that changing your IDL to pass by ref helps. You should
consider that an HBITMAP is a pointer to a struct that contains only an
unused field. Hence, an HBITMAP is actually j...more >>
RE: How to register an app to the scanner events using VB.NET or C Posted by Adam Root at 4/17/2008 4:26:00 PM I think I had to make sure to pass a valid *full* path to my exe and wrap it
in single quotes (in the string, not in the code... that is
"\"drive:\path\to\myexe.exe\"")
Something like that.
Adam
"BuzzLightyear" wrote:
> which typo exactly? I tried some different command line strings ...more >>
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