I'm having problems again, I need the filename for a playlist entry, nullsoft says:

211 Retrieves (and returns a pointer in 'ret') a string that contains the filename of a playlist entry (indexed by 'data'). Returns NULL if error, or if 'data' is out of range.

I use:
Code:
    GetFilename = SendMessage(WinamphWnd, WM_USER, index, 211)
And it returns a number(a "pointer"), not a string. How do I get the filename from here?