title: Installing OpenCV HighGUI missing
body: <p>I have some trouble installing OpenCV. I took the 2.3.1 windows superpack available here: <a href="http://opencv.willowgarage.com/wiki/" rel="nofollow">http://opencv.willowgarage.com/wiki/</a>. I extracted it to C:\OpenCV and built it with CMake into the "OpenCV/build" directory, for Visual C++ 64 bits. 
  An INSTALL file was generated, I built it in Debug and Release mode (64bits). Then I tried to do the same for the "minarea" sample file in "OpenCV/samples/c/example_cmake": generate the files with CMake and then build with Visual C++.</p>
  
  <p>Throughout the entire process I had no decisive error I was aware of. But when I try to open the sample exe file, I get: "The program can't start because opencv_highgui231d.dll is missing". And hig</p>