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by: vijaya |
last post by:
I've a problem with PInvoke.I've to invoke a unmanaged dll
fucntion in C# which uses a callback fucntion.Please
apologise for this lenghty message and render ur kind help.
The original dll function and my C# code has been given
below along with the error message.
Error: The return code is 0 which means the fucntion has
executed successfully. But I'm not getting the correct
values in the structure pborcadirentry.
Note: I've tried GC...
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by: Muthiah Samy |
last post by:
Hi All,
I am trying to call COM Component in .NET using PInvoke.
I have rewritten custom IDL file in a managed language(C#).
When I try to invoke one of the COM method from .NET, I am getting the
following exception.
System.Runtime.InteropServices.SEHException: External component has
thrown an exception.
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by: ALI-R |
last post by:
Hi All,
First of all I think this is gonna be one of those threads :-) since I have
bunch of questions which make this very controversial:-0)
Ok,Let's see:
I was reading an article that When you pass a Value-Type to method call
,Boxing and Unboxing would happen,Consider the following snippet:
int a=1355;
myMethod(a);
......
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by: jim4u |
last post by:
I am porting a vb library to vb.net. The vb library has an external
call to an unmanaged dll.
Existing code:
//External function declaration
Private Declare Function Uncompress& Lib "COMPR.DLL" (ByVal SrcSt$,
ByVal SrcLen&, Dest As Any, ByVal DestLen&)
//Invocation of external function
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by: Mathieu Cartoixa |
last post by:
Hi,
I have been annoyed in one of my recent projects with a problem related
to the explicit implementation of an interface on a value type. I will
take an example to show the problem.
Say we have this simple interface :
interface IInitializable
{
void Init();
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by: Jon Slaughter |
last post by:
I'm reading a book on C# and it says there are 4 ways of passing types:
1. Pass value type by value
2. Pass value type by reference
3. Pass reference by value
4. Pass reference by reference.
My interpretation:
1. Essentially pushes the value type on the stack
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by: jpogorman |
last post by:
Hello,
I am trying to get c# custom marshaling working in a particular scenario but it does not appear to be working or not jumping into my marshaling class when I try to debug it. I am try to implement a performance improvement in the transfer of thousands of objects (ClientInfoDescriptor) over a remote call. The objects all have a model object (IDataDrivenModel) to describe them but there may only two or three model objects in total. These...
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by: Ashutosh |
last post by:
pInvoke - arguments marshaling
Hi,
I am using pInvoke and the member function has signature like this in C++
int F1(ULONG handle, LPCTSTR s1, LPCTSTR s2, LPCTSTR s3, LPCTSTR s4)
so, I am using this signature in C#
public static extern int F1( UInt64 handle,
string s1,
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by: jehugaleahsa |
last post by:
Hello:
I am experiencing performance related issues when my custom data
structures work with value types. I use generics to prevent boxing
wherever I can. For instance, I use IEqualityComparer, etc. I have
gone through most of my data structures and verified that I don't
compare to null or call methods that would box my value types.
However, I am still experiencing performance problems. I can process
strings faster than I can process...
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by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
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by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
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by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
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by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
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by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
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by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
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by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
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by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
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