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Filter by week: 1 2 3 4 5 Problems when Interface pointer returned from one thread, Getting called from another thread Posted by staheli.bob NO[at]SPAM gmail.com at 1/28/2006 9:23:03 PM I am developing a namespace extension in .Net and I am returning a
pointer to the IExtractImage interface for thumbnail extraction.
However, the interface methods are called on a different thread by
Windows Explorer and as a result, Explorer slows down considerably. I
am sure this is caused due ...more >>
<DLL> does not contain any types that can be registered for COM Interop. Posted by Dick Swager at 1/28/2006 7:57:39 PM After selecting 'Register for COM Interop' for a project with a class and a
couple of interfaces in it, I am getting a message that the resulting
assembly DLL 'does not contain any types that can be registered for COM
Interop'. There is only one file in the project and only this one project
...more >>
How to call variouse COM wrappers in mscorwks.dll from managed cod Posted by Dec at 1/28/2006 2:23:57 PM I am developing a class similar to RSA and MD5 CryptoServiceProvider.
I need to call advapi32.dll CryptAcquireContext in the .ctor and call
CryptCreateHash, CryptHashData, CryptDeriveKey, CryptDecrypt, CryptEncrypt
etc in other class methods.
In the .ctor RSA and MD5 CryptoServiceProvider and ...more >>
Unable to get rid of MDA in IDE Posted by ViRi at 1/28/2006 5:12:51 AM According to http://msdn2.microsoft.com/en-us/library/d21c150d.aspx you
only have to set MDA=0 in your registry (which i did), i also tried the
COMPLUS_MDA=0.
This all works fine for executing applications, but not in the IDE. I
keep getting an invalidvariant error, the program works fine, i j...more >>
Disposing ActiveX Resources Posted by Fred Chateau at 1/27/2006 4:37:09 PM I have an ActiveX graphical display control running within a Windows Form.
What is the proper method for disposing of everything when closing the
application. When I add the dispose method to the Form class I notice
Intellisense displays 5 overloads: Disposing the (1) Form instance, (2) Base ...more >>
reference parameters between C# and managed C++ Posted by Lee Crabtree at 1/27/2006 3:41:38 PM I was under the impression that the 'ref' keyword in C# allowed you to
pass a variable by reference (seems a bit pedantic, but I'm learning you
can never be too careful). If I have a C++ function like this:
void GimmeByRef(int *gimme),
when I try to call it in C# via something like
wha...more >>
SendNotifyMessage parameters IntPtr? Posted by Eric at 1/27/2006 2:33:08 PM I'm trying to send extra info with the SendNotifyMessage function. Does
anyone know how to do this? if I try an int as a wParam or lParam it can't
convert to IntPtr. Thanks
[DllImport("user32.dll", SetLastError=true, CharSet=CharSet.Auto)]
static extern bool SendNotifyMessage(IntPtr hWnd...more >>
Dllimport and calling function from c# Posted by Martin Venter at 1/27/2006 2:07:56 PM Hi All,
I need to convert this code to c#.
I'm dont know what the dll import should look like and how to call it from
c#.
struct iaxc_audio_device {
char *name;
long capabilities;
int devID;
};
EXPORT int iaxc_audio_devices_get(struct iaxc_audio_device **devs, int
*nDevs, int *i...more >>
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How can I tell which version of Excel is installed? Posted by Flack at 1/27/2006 11:26:42 AM Hey guys,
Can someone tell me or show me how I can programatically discover what
version of Excel a machine has installed, or if the machine has Excel
installed at all?
If anyone has some sample code (C#) that would be great.
Thanks...more >>
Late-bound COM calls to overloaded .NET method need decorated names? Posted by Alex K. Angelopoulos at 1/27/2006 6:20:24 AM I've been working on a project where I call some .NET classes from a
late-bound COM client (WSH-hosted VBScript), and I've noticed that in at
least some cases the calls fail unless I decorate the method names to
specify the correct overload to call. As an example, it's easy to create
a Syste...more >>
Callback Posted by Martin Venter at 1/27/2006 12:00:00 AM Hi All,
I need some help setting up a callback between C and C#.
Here is the C code:
typedef int (*iaxc_event_callback_t)(iaxc_event e);
EXPORT void iaxc_set_event_callback(iaxc_event_callback_t func);
iaxc_event is a struct.
Any help will be appreciated.
Regards,
Martin Venter
...more >>
interop .ini path Posted by Allen S. at 1/26/2006 3:39:03 PM We are developing a web service that is calling a non-managed code .dll. The
non-managed .dll uses an .ini file. We have tried putting the .ini file in
the bin directory, as well as the web service root directory and we are
getting a file-not-found error. Has anyone experienced this?...more >>
howto use user32 in c# without declaring functions Posted by Abraham Andres Luna at 1/26/2006 1:29:49 PM is there a way to create an interop assembly for the user32 dll
i tried to add a reference to it through visual c# 05' express but it says
it's not a valid com object
i don't want to have to write reference code for each method i'm going to
use, or is that the only way :(
thank you for yo...more >>
access .Net components from Excel 97 Posted by ennis at 1/26/2006 10:32:50 AM Hi Everyone,
I am trying to access .Net components from Excel 97.
For testing I am following an example presented in
a 2001 posting by Manish Mehta at:
http://www.c-sharpcorner.com/articles/accessingdotnetfromcom.asp
Source code for the VB.Net component is:
imports system
namespac...more >>
Interop fails depedning on the Win Account Posted by TDC at 1/26/2006 5:35:37 AM On a Windows 2003 machine, I installed our software which makes use of
COM Interop from a .NET service. We don't normally have any problems,
but on this machine we were getting InvalidCast and/or QueryInterface
errors. When I changed the account to Admin everything started
working. I don't se...more >>
Excel interop deployment Posted by gilles27 NO[at]SPAM talk21.com at 1/26/2006 2:24:02 AM I am writing some code which exports the contents of a grid to Excel.
It allows the user to specify a template (xlt file) from which to
create the new workbook into which the data is pasted.
The .NET project in which this code resides now has a dependency on
Microsoft.Office.Interop.Excel. The...more >>
Best Practices? Inter Application Communication Posted by Brien King at 1/25/2006 8:15:02 PM I have a .NET (1.1) application and I need to allow a non-.NET application
to communicate with it so they can control my application. The other
application uses VBScript 5.6 and can control COM applications.
Basically, I want to create an API in my app that allows another application
to ope...more >>
marshalling a struct with a blittable array Posted by Lee Crabtree at 1/25/2006 12:32:08 PM Alright, this should be easy, judging by the number of entries that involve
marshalling structs with non-blittable arrays, but I cannot for the life of
me figure this out.
I'm developing the managed side of what will eventually be a class for
controlling a device across a USB connection. T...more >>
Problem marshalling two-dimensional array in structure Posted by LarsJ at 1/25/2006 9:47:01 AM Hi!
Having a working excel app which calls a C-lib (not COM). Looks like this:
Type curve_data
Qmas(19, 2) As Double
Qvol(19, 2) As Double
Head(19, 2) As Double
Eff(19, 2) As Double
Pdis(19, 2) As Double
Power(19, 2) As Double
arraysize(2) As Long
End Type
P...more >>
delegate to void* Posted by Antao Almada at 1/25/2006 7:30:03 AM Hi,
I'm trying to call a C function that has a void* parameter where the content
type depends on a flag parameter:
int SetProperty(const char* property, void* value);
I'm wrapping it this way:
[DllImport(libname)]
public static extern int SetProperty([In,
MarshalAs(UnmanagedType.LPS...more >>
C# methods with delegate parameters used from VB6 Posted by Clive Dixon at 1/25/2006 12:00:00 AM How do I use a method with a delegate parameter from VB6? Is it even
possible? I can't seem to find any documentation covering this.
...more >>
Best Practice: .NET Class Library Exposed as COM Posted by beaudetious at 1/24/2006 7:21:02 AM I've got a question regarding the best way to develop a .NET class library
that will be consumed in an application as an Automation object. My
particulars are VS.NET 2003 and C#.
Here's the list of questions I have based on my research:
1) Do I have to use an interface approach or just ma...more >>
Strange Problem With The Interop Posted by batista at 1/24/2006 3:53:45 AM Hi there,
i have a web service which is using a dll written in vc7.This dll in
turn is accessing a vc6 com dll through interop.
Now the problem is that i have a function in vc6 that takes as param
zipped data and returns me unzip data.The params it takes r
1)the starting memory address of t...more >>
dllimport interface usage Posted by Joan van den Heuvel, Netherlands at 1/24/2006 1:02:02 AM I have written my application in VB6
When I upgrade to VB2005 some issues are easily fixed, but I need a DLL
written in C to connect to a RDM database . TLBIMP makes a assembly (works
better than the upgrade wizard) wich works fine for procedures like logging
in. I can see the DLL in the o...more >>
What about SerialPort and performance? Posted by JWagner at 1/23/2006 3:56:02 AM Hello everyone,
I'm new to the MS .Net framework and C#, but aware of MFC and Win32
programming.
I have the task to communicate with electronic devices connected to the pc
by rs232 (yes, even in 2006!) to exchange measurement and controlling data.
In my former MFC applications I used an...more >>
Need help with DllImport Error Posted by John Collins at 1/22/2006 11:38:21 AM I am using DllImport to call a function in a seperate dll written in C:
[DllImport("db.dll", EntryPoint = "DBL_ConnectServerAndOpenDatabase",
CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi,
ExactSpelling = true)]
internal static extern void ConnectServerAndOpenDatabaseNa...more >>
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