Solved

pass unicode from COM client to COM server

Posted on 2004-03-24
2
296 Views
Last Modified: 2010-04-01
hello, all,

  A COM server (VC6.0) which requires a string with unicode characters from client (VC6.0), therefore I defined a BSTR variable in COM server interface. it looks like:

//COM server
CCNStServer::GeneralBrowser(BSTR name)
{
.....
}

On client side, my code looks like:
//COM Client
_bstr_t name("xxxxxxx"/*unicode might be inside of this string*/);
theApp.GetServerHandle()->GeneralBrowser(name);
...
 I found that only Ascii characters can be passed to COM server, I have no idea where  those unicode characters are!, anybody can help me?

thanx in advance
 
 
0
Comment
Question by:kim_wei
2 Comments
 
LVL 12

Expert Comment

by:andrewjb
ID: 10669101
"xxxxx" isn't a unicode string literal.

You need, say

_T("xxxxxx")
0
 
LVL 23

Accepted Solution

by:
chensu earned 50 total points
ID: 10670400
Though "xxxxx" is an ANSI string, the constructor of _bstr_t is able to convert it to Unicode. To explicitly specify Unicode strings, use L"xxxxx". I don't think there is a problem. How do you know the Unicode strings are not working? Maybe you are debugging it without turning on Unicode?

Check the following option,

Menu Tools/Options..., Debug tab, Display unicode strings
0

Featured Post

Live: Real-Time Solutions, Start Here

Receive instant 1:1 support from technology experts, using our real-time conversation and whiteboard interface. Your first 5 minutes are always free.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Errors will happen. It is a fact of life for the programmer. How and when errors are detected have a great impact on quality and cost of a product. It is better to detect errors at compile time, when possible and practical. Errors that make their wa…
This article will show you some of the more useful Standard Template Library (STL) algorithms through the use of working examples.  You will learn about how these algorithms fit into the STL architecture, how they work with STL containers, and why t…
The goal of the video will be to teach the user the concept of local variables and scope. An example of a locally defined variable will be given as well as an explanation of what scope is in C++. The local variable and concept of scope will be relat…
The viewer will be introduced to the technique of using vectors in C++. The video will cover how to define a vector, store values in the vector and retrieve data from the values stored in the vector.

776 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question