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    <p>OK, After many hours of Googling, I successfully compiled a DLL to add as a SQL Server 2000 extended stored procedure. I'm going to share it here, since it's just a compilation of things I've put together from my Googling. (I used Visual Studio 2010). I'm not going to post everything - I started by creating a new project in Visual Studio and choosing Win32 Console Application, then Next, then DLL. It creates a few header files and other files for you. Some of them I didn't see any need for. And some of the header files you must add to the project manually. But here's my main .cpp code:</p> <pre><code>#include "stdafx.h" #include "srv.h" //Must get from C:\Program Files (x86)\Microsoft SQL Server\80\Tools\DevTools\Include #include "shellapi.h" //need for ShellExecute #include "string" //needed for std:string #include &lt;sys/stat.h&gt; //need for stat in fileExists function below #define DLL_FUNC extern "C" __declspec (dllexport) __declspec(dllexport) ULONG __GetXpVersion() { return ODS_VERSION; } bool fileExists(const std::string&amp; filename) { struct stat buf; if (stat(filename.c_str(), &amp;buf) != -1) { return true; } return false; } DLL_FUNC int __stdcall RunPP() { if (fileExists("C:\\FileOnServer\\execute.bat")) { ShellExecute(NULL,TEXT("open"), TEXT("C:\\FileOnServer\\execute.bat"), NULL, NULL,SW_SHOWNORMAL); return 0; } else { MessageBox(HWND_DESKTOP, TEXT("File not found."), TEXT("Message"), MB_OK); return 1; } } </code></pre> <p>I learned that you can test out this DLL using rundll32 (<code>rundll32 yourdllname.dll,functionname</code> {no space after comma}) from the command line, but only if you include a .def file in your project. My def file is</p> <pre><code>LIBRARY EXPORTS RunPP </code></pre> <p>Also, as the <a href="http://msdn.microsoft.com/en-us/library/aa215790%28v=sql.80%29.aspx" rel="nofollow">documentation</a> states, I tried to add a reference to Opends60.lib in Project > Properties... > Linker > Input > Additional Dependencies, but it looks like it got removed at some point.</p> <p>For those of you as newbie as I am, I had to learn a lot of things in the project's Property pages like switching C/C++ > Code Generation > Runtime Library to /MD. Also learning how to compile in Release mode, where to locate the resulting .dll file, etc.</p> <p>Then when moving the compiled DLL to my SQL Server machine (Win2003R2), I had to install the VC++ 2010 Redistributable for it to run. Then I copied the DLL to C:\Program Files\Microsoft SQL Server\MSSQL\Binn on my machine (same place where xp_cmdShell extended stored procedure's DLL was), and then ran sp_addextendedproc according to the documentation to register it as an available extended stored procedure in the master database. Then granting privileges for users to execute it, etc.</p> <p>I know all this is an old technology. I should just upgrade my SQL Server version. But maybe this will help someone else.</p>
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