Windows Form application and "#include <stdlib.h>"

That header is deprecated, you should use "#include <cstdlib>"

Ok, added it.
This is how the beginning of my file looks like:

#pragma once


namespace OpenCVtester {

      using namespace System;
      using namespace System::ComponentModel;
      using namespace System::Collections;
      using namespace System::Windows::Forms;
      using namespace System::Data;
      using namespace System::Drawing;

      #include <cstdlib>
      #include "Headers.h"

And I get errors like:
c:\program files\microsoft visual studio 9.0\vc\include\codeanalysis\sourceannotations.h(234) : error C3083: 'vc_attributes': the symbol to the left of a '::' must be a type
c:\program files\microsoft visual studio 9.0\vc\include\codeanalysis\sourceannotations.h(234) : error C2039: 'YesNoMaybe' : is not a member of '`global namespace''
c:\program files\microsoft visual studio 9.0\vc\include\codeanalysis\sourceannotations.h(234) : error C2146: syntax error : missing ';' before identifier 'SA_YesNoMaybe'
c:\program files\microsoft visual studio 9.0\vc\include\codeanalysis\sourceannotations.h(234) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
c:\program files\microsoft visual studio 9.0\vc\include\codeanalysis\sourceannotations.h(234) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
c:\program files\microsoft visual studio 9.0\vc\include\codeanalysis\sourceannotations.h(235) : error C3083: 'vc_attributes': the symbol to the left of a '::' must be a type
c:\program files\microsoft visual studio 9.0\vc\include\codeanalysis\sourceannotations.h(235) : error C2039: 'YesNoMaybe' : is not a member of '`global namespace''
c:\program files\microsoft visual studio 9.0\vc\include\codeanalysis\sourceannotations.h(235) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
c:\program files\microsoft visual studio 9.0\vc\include\codeanalysis\sourceannotations.h(235) : error C2146: syntax error : missing ';' before identifier 'SA_Yes'
c:\program files\microsoft visual studio 9.0\vc\include\codeanalysis\sourceannotations.h(235) : error C2377: 'OpenCVtester::YesNoMaybe' : redefinition; typedef cannot be overloaded with any other symbol
        c:\program files\microsoft visual studio 9.0\vc\include\codeanalysis\sourceannotations.h(234) : see declaration of 'OpenCVtester::YesNoMaybe'



panJames