Hmm, doesn't this only work for files?

Maybe I should describe a bit more detailed what I got.

Currently I have a data handler class which provides several public functions and is a singleton instance (managing several data containers). This will only work for the current process which runs the data handler instance. So my idea was to 'outsource' my datahandler with it's data containers to have one single point of data handling for all my processes. The 'processes' are any windows program - my app is a namespace extension runing in the explorer.exe process, but the already buffered should be available in 'save as...' dialogs of any applications too. So that the data doesn't need to be reloaded again and again.