MP1-4299 : fixed error in PlaybackStateChanged after used F7/F8 for previous/next playing title.
MP1-4299 : Remove LoadLibrary and use checking Exports without load a library to bypass invalid DLL's, now work to all other PluginTypes too.
MP1-4299: Cast IWMPEffects in to IWMPEffects2 so plugin supports only IWMPEffects no longer load in configuration Dialog (this Plugins not work in MP)