If you are looking to find how much disk space is available on a particular drive, the finding the amount of Available/free memory won't be much good will it !!!
Memory and disk space are two completely different things
To find out how much memory is available, see the above.
To find out how much disk space is available:
Put a reference in VB to 'Microsoft Scripting Runtime'
Dim objFileSys as filesystemObject
Set objFileSys = new Filesystemobject
' Drives is a collection of all drives
' on the current machine, so you need to
' access the appropriate one
objFileSys.Drives(0).FreeSpace
Hope this helps,
Chris Dukes