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POWhat to do when dll return a string not correctly terminated
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  1. POWhat to do when dll return a string not correctly terminated
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    copied!<p>I have an third part dll that have a function that returns a string. When I call the function I got for example "123456" back. At least it seams like that, but when i do mystring.length it does not return any length. If I set the text property of a label it shows "123456".</p> <p>When I have the string I got from the dll I send it to a webservice function:</p> <pre><code>rem call dll and get string dim mystring as string=mydll.getstring() rem Send it to the webservice webservice.SaveString(mystring) </code></pre> <p>The webservice crashes with an webexeption ("protocoll error") when I send in the string I got from the dll. If I instead send it like this:</p> <pre><code>rem call dll and get string dim mystring as string=mydll.getstring() rem Send it to the webservice dim FixedString as string = mid(mystring,1,6) webservice.SaveString(mystring) </code></pre> <p>Then it works and everything is fine. That leads me to think that the string I got from the DLL is in someway not terminated correct. And I dont know how to fix it from vb.net (I cant change the DLL) and I dont know in beforehand how long the string will be.</p> <p>The dll does only work on site when specific hardware is connected so I can't sit at the office trying to fix this in dev-environment. So I would like to have some possibly solutions to this before I go to the customer again.</p> <p><strong>Edit 1:</strong> I tried to just do a loop that looped from 1 to 100 (because I dont know the real length) and tried to copy all characters that &lt;>"" to a new variable but it didnt work. I didnt try other variants because the day was over and I had to leave the customer site.</p> <p><strong>Edit 2:</strong><br> The DLL Im talking to is made in VB6. That DLL is talking to other DLLs that is made in C++ (I think).</p> <p>My program &lt; - > vb6-DLL &lt;-> c++-DLL &lt;-> hardware</p>
 

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