Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win


Problem with BSTR in VC++/DCOM.

Posted on 1998-09-24
Medium Priority
Last Modified: 2012-08-14
For oleautomation I am passing a BSTR from client program.The server is accepting it gracefully, but I want to convert the BSTR variable in server side to a char * or char array.My server can't use MFC as set previously.I tried with OLE2T/T2OLE etc. please help me in this matter.

Thanking u in anticipation,
Baidehish Dwibedy.
Question by:bdwibedy
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2

Author Comment

ID: 1173590
LVL 86

Accepted Solution

jkr earned 200 total points
ID: 1173591
Use 'VectorFromBstr()' to receive an array of SAFEARRAYs of type 'VT_UI1'. You'll get the chars evaluating *(asa[ i].pvData)

Expert Comment

ID: 1173592
Cheap and dangerous way:
(Only dangerous if localization is an issue)
char buffer[max_buffer_size];
sprintf( buffer, "%S", bstr );  // Note that it's %'capital S'

Or you could use the MultiByteToWideChar function.

Expert Comment

ID: 1173593
Sorry, I meant to say the WideCharToMultiByte function.

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

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…
Introduction This article is a continuation of the C/C++ Visual Studio Express debugger series. Part 1 provided a quick start guide in using the debugger. Part 2 focused on additional topics in breakpoints. As your assignments become a little more …
The goal of the tutorial is to teach the user how to use functions in C++. The video will cover how to define functions, how to call functions and how to create functions prototypes. Microsoft Visual C++ 2010 Express will be used as a text editor an…
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.
Suggested Courses

610 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