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by: lolomgwtf |
last post by:
I have a managed C++ method that wraps unmanaged code and creates a
managed object holding data retrieved form an unmanged one. I want
create an instance of this managed class in C#, pass it to this method
and have it set the instance to hold the right data.
>From what I've read it seems I should be able to pass C# objects to
managed C++ methods and it should just work; however, when I try it, my
C# instance comes out null. If I step...
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by: Chris |
last post by:
Hi,
I seem to be having a problem I can't quite figure out. Currently, I have
the following code (below). In the SendMsg function, I create a 'Qtkmsg'
which converts the string 'text' into a null terminated character array that
is sent through the DllImport interface 'QtkSendMesg'. However, when I
receive this struct in the C++ DLL, the character array that I passed to it
is filled with random characters. What am I doing wrong when...
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by: lolomgwtf |
last post by:
I have a managed C++ method that wraps unmanaged code and creates a
managed object holding data retrieved form an unmanged one. I want
create an instance of this managed class in C#, pass it to this method
and have it set the instance to hold the right data.
>From what I've read it seems I should be able to pass C# objects to
managed C++ methods and it should just work; however, when I try it, my
C# instance comes out null. If I step...
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by: Steve Baer |
last post by:
I'm wrapping some unmanaged C++ classes with managed versions for use in the
..NET world. Everything is going great except I can't figure out a good
method for passing simple data type arrays into unmanaged classes.
Say I have a function
void UnManagedClass::FillOutArray(int size, int* data);
where data is an array of unmanaged ints and size gives the size of the
array.
I would like to wrap the function like so
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by: Lonewolf |
last post by:
Hi,
I'm not sure if this has been asked before so please pardon me if this
is a repeated question. Basically I have some performance critical
directshow codes which is implemented in native, unmanaged C++. I have
written a managed wrapper for it using C++/CLI. problem comes when I try
to pass a C# string over to the DLL via C++/CLO. Basically I have a
textbox in the C# GUI, and I declared my C++/CLI property as follows.
C++/CLI property...
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by: mr.resistor |
last post by:
hey
i am having a few problems calling a C DLL from C#. i am using a simple
function that takes an array of floats and an integer as an input, but
i cannot seem to get it to work. when i try to compile i get the
following error:
Attempted to read or write protected memory
the C function should not be manipulating the input arra, only reading
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by: Andreas Reiff |
last post by:
Hi!
I want some communication to take place between a c++ app and a c++ .dll
with an intermediate managed/unmanaged c++ dll. Basicall, I want the
unmanaged c++ dll to have a callback to the unmanaged c++ app. Also, the
managed c++ part should call the c# dll. I don't mind about where the array
is created, but I need to be able to pass it around.
Anyhow, my problem is, that if I create an array in unmanaged c++ like
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by: =?Utf-8?B?U2hhcm9u?= |
last post by:
In my managed code (C#) I have a some dozens of single dimension byte array.
I get each of this arrays from another unmanaged code (first DLL).
I need to stitch these arrays to a dual dimensions array and to be passed to
a unmanaged DLL (second DLL) that will change the values of this array. When
this unmanaged function returns from the unmanaged DLL, I'll need to use this
changed data.
I have 2 questions:
(1) How can stitch the...
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by: =?Utf-8?B?U2hhcm9u?= |
last post by:
Hi Gurus,
I need to transfer a jagged array of byte by reference to unmanaged
function, The unmanaged code should changed the values of the array, and when
the unmanaged function returns I need to show the array data to the end user.
Can I do that?
How?
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by: jonpb |
last post by:
Using .NET 3.5, I need to pass an array of structs as parameter to a C++
unmanaged function.
The C++ dll stores some data in an unmanaged cache, the function writes
the values into the array of structs. The array of structs are allocated
by C#.
If I pass the array without 'ref' it works fine on the C++ side, but
after returning to C# the array struct values are all zero. If I pass
with 'ref' the application crashes. If I use a class...
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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: 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: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
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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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