<p>I'm trying to add an header file to dev-C++ but when I compile it it doesn't work.
Here are my exact steps (for my example, I'm trying to get mysql.h to work):</p>

<ol>
<li>copy "mysql.h" into c:\dev-c++\includes</li>
<li>check that in dev-C++ tools > compiler options > directories > c includes and c++ includes have the path to "c:\dev-c++\includes"</li>
<li>include #include  at the top of my file</li>
<li>compiled</li>
</ol>

<p>This is what the dev-C++ compiler told me:</p>

<pre><code>13 C:\Documents and Settings\Steve\Desktop\server code\setup1\main.c `mysql' undeclared (first use in this function) 
</code></pre>

<p>As well as other errors due to not locating the header file</p>

<p>Are the steps I've outlined correct? Or is there something else I need to do to get the header files to compile.</p>

<p>P.S. I tried doing the same with VS2008 (put mysql.h in the vs2008 include folder, etc)
but still have the same error.  I would like to stick with Dev-c++ if possible.</p>

You didn't say how you included it at the top of your file. This should work if you did
```
```
#include "mysql.h"
```
```
rather than
```
```
#include <mysql>
```
```
which is a mistake that people sometimes make.
EDIT: Perhaps try using relative paths rather than an absolute path (as you seem to be doing) when specifying additional include directories? I don't know if that would make a difference (and I don't have the time to check) but I've always used relative paths and it's always worked for me (it's also good practice anyway). So, instead of
C:\Projects\ProjectName\Include
something like
\Include or ..\Include depending on your project file structure.