CString or string DLL

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Hi all,

i was passing a vector of CString to a DLL and in the debug mode when i tried to look to the content of the vector all was asian caracters 桔敲e, but when i chenged the code to maske it as string they worked fine.

how could i be able using CString instead of string?

thanj you

Posted 15-Jan-12 10:13am

Schehaider_Aymen

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Sergey Alexandrovich Kryukov 15-Jan-12 21:38pm

Let me see: you think Asian characters are wrong? Which are "fine"? European? American? What kind? Why? :-)
--SA

3 solutions

Solution 2

use native char* with 0-termination your transmitting such strings.

Everything else will bring you sooner or later trouble

Posted 16-Jan-12 0:50am

KarstenK

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Stefan_Lang 16-Jan-12 8:13am

I'm torn between up- and downvoting this:

Up because I hate proprietary types such as CString and wouldn't touch them with a 10 foot pole if I had the choice. And I prefer obvious types that have no hidden functionality or structure, when I'm unsure on how to manipulate them properly. (so I can at least always check the debugger to see if my algorithms do what I expect them to)

Down because it's not clear whether the OP actually has a choice. And because there already is a working solution. Also the asian chars imply these are wide char strings, so you should at least suggest wchar* ;-)

KarstenK 16-Jan-12 8:18am

you are absolutly right ;-)

Albert Holguin 16-Jan-12 15:54pm

I upvoted... when dealing with dll interfaces, it's best to keep things as simple as possible... +5

Solution 3

yes use char* , if you use std::string make sure you are using correct CRT runtime on both ends.

Posted 16-Jan-12 2:26am

jk chan

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«_Superman_» · Accepted Answer · 2012-01-15T14:46:00

CString uses either the ASCII character set or the UNICODE character set depending on whether the UNICODE pre-processor macro is defined.
Visual Studio defines UNICODE by default.
std::string on the other hand always uses the ASCII character set.
You can explicitly use CStringA to use the ASCII version.
Or you can undefine the UNICODE pre-processor from Visual Studio by changing the Character Set property -
Project -> Properties -> Configuration Properties -> General -> Character Set -> Not Set.