Unicode string not working as expected

Question

0.00/5 (No votes)

See more:

I have a C++ program(the gpc program clipper) and a vb wrapper for it.

I have one problem in it. When i call fopen with a "file.out"
as string.fopen gets a collection of words instead of bytes and feels that I gave only 1 char followed by a null.

How do I manage to send a cstyle string?

in vb.net:
problem using vb.net(dotnet) string(16 bit unicode) to a c function expecting 8 bit byte string
Private Declare Auto Function fopen Lib msvcr100.dll (ByVal fn As String, ByVal mode As String) As IntPtr

Posted 28-Jul-10 1:32am

Shunya

Updated 28-Jul-10 1:51am

Sandeep Mewara

v3

Add a Solution

Comments

Sandeep Mewara 28-Jul-10 7:51am

Your last part of question, from 'in vb.net..." - it's unclear. You can use 'Improve Question' to edit and update the last part.

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

E.F. Nijboer · Answer 1 · 2010-07-28T01:51:00

Solution 1

In "old" vb you would use StrConv. In VB.NET you should use the Encoding class. Have look at the link below.

http://msdn.microsoft.com/en-us/library/system.text.encoding.aspx[^]

Good luck!

Posted 28-Jul-10 1:51am

E.F. Nijboer

Shunya · Answer 2 · 2010-07-28T02:22:00

Solution 2

I managed it by replacing Auto by Ansi in the Declare statement for fopen.

Posted 28-Jul-10 2:22am

Shunya