COM variant types into byte array

Similar topics

Accessing array inside a VARIANT in VC++

by: Demian | last post by:

Hi, I developed an OCX in VC++, wich takes a VARIANT as parameter and return a Long as the result of the operation. This VARIANT cames from a client VB6.0 wich send an array of Byte as a VARIANT, so acomplish Autonmation std. I need to access the array inside the variant to load an user-defined struct with it. To do this I used the myvariant->parray.pvData but it didn't work. It seems that the data wasn't there... I tried with...

C / C++

1912

Marshalling Variant Arrays from COM

by: Andrew S. Giles | last post by:

Helo all, I have a standalone unmanaged C++ application that makes a call on another standalone COM server, which raises an event that should be handled in C#. I am trying to send: unsigned long, double, BSTR, and VARIANT. The unsigned long, double, and BSTR (marshalled to System.String) work just fine and dandy.

C# / C Sharp

3303

How do I pass a variant byte array to a .NET web service?

by: abarberis | last post by:

I'm very confused with this. I have a .NET web service that I am trying to pass a variant byte array to from the client side. If the signature of the web service is set to accept an Object it seems to pass it in but I can't access the array that should be in there. If I set the signature as a byte array I get an error in webservice.htc. It seems to be trying to encode the variable to base 64 and it fails when trying to do a .length on it....

Javascript

3801

How do I pass a variant byte array to a .NET web service?

by: abarberis | last post by:

ASP.NET

9645

What is ONU?

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...

General

9480

Changing the language in Windows 10

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,...

Windows Server

10325

Problem With Comparison Operator <=> in G++

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...

C / C++

10147

Maximizing Business Potential: The Nexus of Website Design and Digital Marketing

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...

Online Marketing

7499

Access Europe - Using VBA to create a class based on a table - Wed 1 May

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...

Microsoft Access / VBA

5381

Trying to create a lan-to-lan vpn between two differents networks

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...

Networking - Hardware / Configuration

5511

Windows Forms - .Net 8.0

by: adsilva | last post by:

A Windows Forms form does not have the event Unload, like VB6. What one acts like?

Visual Basic .NET

4050

transfer the data from one system to another through ip address

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

C# / C Sharp

3645

How to add payments to a PHP MySQL app.

by: muto222 | last post by:

How can i add a mobile payment intergratation into php mysql website.

PHP