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by: Chris |
last post by:
I am not sure if this is the right newsgroup. But does anyone know what is
the difference between a BSTR and a LPOLESTR?
The only thing I could find out is that the advantage of taking BSTR instead
of LPOLESTR is that determining the length of a BSTR is much faster.
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by: Gilad Walden |
last post by:
I use C# in .NET framework.
I have an ActiveX implemented in C++ that has a COM interface method that
gets as it’s out parameter a BSTR* . The interop translates this BSTR* into
C# string. From my managed code, I am calling that function with ‘out’
parameter of ‘string’ type. For normal size strings it works fine, but when
the string is very big (> 50,000 bytes), I get a null exception from the COM
interop.
What is the reason?...
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by: Digifox |
last post by:
I am new to this environment!
But if I am in the write area to begin with!
In my atl dll I am creating a functions that pass information back and forth
to access, vb and csharp.
I am trying to iterate thru the string put here, newVal.
I want to loop thru a variable length string and rebuild
an encrypted string that gets passed back to newVal.
Maybe a for or loop statement around newVal.
I would like to rebuild the string(newVal)
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by: Michael Tissington |
last post by:
I have a C++ function in a DLL of the form
BSTR WINAPI DoSomeWork(LPCSTR szConnection, LPCSTR szGUID)
I use SysAllocStringByteLen to return a BSTR.
For the most part this works accept when the calling applicaiton tries to
free the BSTR and I get a RtlFreeHeep error. I'm guessing because the bstr
has been allocated in one dll and it being released in another.
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by: Karthik |
last post by:
Hello!
I am not a wizard in this area! Just need some help out in this. I am
trying to convert bstr string to new character string. Here is the
snippet of my code.
**** Code Start****
GlobalInterfacePtr->GetName(bstr, bstrTNamePtr, &retVal);
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by: bluter |
last post by:
We have server components which were created by a third party and
compiled in VC++5 (sp3). They run fine on NT4 and 2000, however during
testing of our migration to Server 2003, these components have been
failing when performing Data Access functions. In particular we have
been having problems with BSTR and _bstr_t.
_bstr_t(BSTR*, 1) is the original code that the problem started with.
Other findings are -
1) Converting a BSTR* to a...
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by: Egbert Nierop \(MVP for IIS\) |
last post by:
In win32 mode, a BSTR was UINT length prefixed and terminated exactly by a
zero char.
So if you allocated "Hello World" that would allocate 28 bytes.
In x64 and (IA64 as well) it would become 32 bytes, because of the fact that
a pointer, is 8 bytes instead of 4 bytes.
The length prefix -still- is a UINT however and not a UINT_PTR.
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by: Abubakar |
last post by:
Hi,
Lets say I write this line:
BSTR b = m_pdoc->Getxml ();
where m_pdoc is MSXML2::IXMLDOMDocumentPtr.
Now "b" contains the xml text. When I exit the function in which this line
is written, do I have to take care about deleting "b"? And how do I do it ?
Regards,
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by: mzdude |
last post by:
I need to interface with a windows DLL that has the following
signature
extern "C" void Foo( BSTR in, BSTR *out )
Code so far
Traceback (most recent call last):
File "<pyshell#14>", line 1, in <module>
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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: 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: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
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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: 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: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
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