Written
October 05, 2011
The File Picker extension is designed to support the picking of files from Windows Metro style apps. As such, only the FileOpenPicker (and not the FileSavePicker or FolderPicker) are supported. Additional details are located here: http://msdn.microsoft.com/en-us/library/windows/apps/hh465192(v=VS.85).aspx
If you would like your app to be a destination for Windows Metro style apps, you can implement the Share target contract. Additional details are located here: http://msdn.microsoft.com/en-us/library/windows/apps/hh465255(v=VS.85).aspx