Regardless of C++ solution program using OpenCV, I get VIDEOCAPTURE is ambiguous error

edit

I have several programs in VS 2013 C++ using OpenCV 2.4.9. They all used to work. All of a sudden I am getting an error saying,

"Error 1 error C2872: 'VideoCapture' : ambiguous symbol D:\AllProgrammingProjs\C++Stuff\MyNewOpenCV\MyNewOpenCV\Main.cpp 15 1 MyNewOpenCV"

It shows up on all the programs. Someone want to venture a guess what happened??