[CMake] problem with ((The source directory "C:/opencv" does not appear to contain CMakeLists.txt.))

[‪Marzieh Fazlolahzadeh‬ ‪]

helloI HAVE PROBLEM WITH The source directory "C:/opencv" does not appear to contain CMakeLists.txt.
i want to use opencv and when type direction c:/opencv as where is the source codeand c:/opencv/build as where to build the binaries  in cmake gui window i face this error:The source directory "C:/opencv" does not appear to contain CMakeLists.txt.
in win8-64  opencv 3.2 and python 2.7 and visual studio 2015,cmake 3.7.1 marzieh fazlolahzadeh 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/cmake/attachments/20170103/110975ae/attachment.html>