Set exposure of a directshow camera to -11

- The camera is a rear camera of an iWork8 tablet. - AMCap can set its exposure manually with a slide bar. - However, opencv CV_CAP_PROP_EXPOSURE doesn't work. - Please write c++ software on Visual Studio 2012 in my PC (Windows 10) to set the rear camera's exposure to -11 automatically (no slidebar). And show vdo preview. (Should be very dark.) - I will let you remote to work in my PC. - When finish, I will recompile and test it. - If you want to use a library, it must be free of charge, and you have to tell me how to use it.