473,804 Members | 3,383 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

passing naitve function pointers to naitve code

Hi!

I have a strange problem:

I need to wrap a C-function in a native DLL into a C#-class. This
function expects one C-function pointer out of a set of some
C-functions defined in the same DLL.

How can I access and pass such a C-function pointer to a C-function out
of C#?

Thank You!
Ruben

Nov 17 '05 #1
2 1018
As far as im aware you just pass a delegate through to the C-function (via
P/Invoke) and it all works by "magic"! The C-dll will call back to your C#
delegate transparently.

"Mr****@gmx .de" wrote:
Hi!

I have a strange problem:

I need to wrap a C-function in a native DLL into a C#-class. This
function expects one C-function pointer out of a set of some
C-functions defined in the same DLL.

How can I access and pass such a C-function pointer to a C-function out
of C#?

Thank You!
Ruben

Nov 17 '05 #2
Jack Ukleja schrieb:
As far as im aware you just pass a delegate through to the C-function (via
P/Invoke) and it all works by "magic"! The C-dll will call back to your C#
delegate transparently.


Sorry, my question was obviously bad phrased:

The function B(), which the native function A() in the dll should call
back, is also a native c-function in the same dll.
One way would be to wrap the function B() into a delegate. But this
would mean, that I jump from C# to A(), than back to the delegate in
C#, which calls the function B().

I would like to avoid that, if there is a way...

Thank you!
Ruben

Nov 17 '05 #3

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

58
10188
by: jr | last post by:
Sorry for this very dumb question, but I've clearly got a long way to go! Can someone please help me pass an array into a function. Here's a starting point. void TheMainFunc() { // Body of code... TCHAR myArray; DoStuff(myArray);
8
4119
by: kalinga1234 | last post by:
there is a problem regarding passing array of characters to another function(without using structures,pointer etc,).can anybody help me to solve the problem.
2
4317
by: Morgan | last post by:
Thanks to all of you because I solved the problem related with my previous post. I simply made confusion with pointers to pointers and then succeeded passing the reference to the first element pointer. :-)) You were right about by mixed code: quickly writing an example to clarify the matter I made a C++ program, sorry for the inconvenience. Anyway, although it all works fine with monodimensional arrays, I still have a problem with...
11
8133
by: John Pass | last post by:
Hi, In the attached example, I do understand that the references are not changed if an array is passed by Val. What I do not understand is the result of line 99 (If one can find this by line number) which is the last line of the following sub routine: ' procedure modifies elements of array and assigns ' new reference (note ByVal) Sub FirstDouble(ByVal array As Integer()) Dim i As Integer
11
4435
by: cps | last post by:
Hi, I'm a C programmer taking my first steps into the world of C++. I'm currently developing a C++ 3D graphics application using GLUT (OpenGL Utility Toolkit written in C) for the GUI components. The application is built around a "World" object that contains a "GUI" object that is a C++ wrapper around GLUT. What I'd like to do is pass a pointer to a member function in the World class to function in the GUI
12
5407
by: Mike | last post by:
Consider the following code: """ struct person { char *name; int age; }; typedef struct person* StructType;
8
2101
by: Ivan Liu | last post by:
Hi, I'd like to ask if passing an object as an pointer into a function evokes the copy constructor. Ivan
4
2507
by: Christian Maier | last post by:
Hi After surfing a while I have still trouble with this array thing. I have the following function and recive a Segmentation fault, how must I code this right?? Thanks Christian Maier
17
7261
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?
0
9705
marktang
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...
0
9575
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,...
0
10320
jinu1996
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...
1
10308
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,...
1
7609
isladogs
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...
0
5513
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...
0
5645
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
1
4288
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
2
3806
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.