DTree_Node:FilePopulateCallback( table files, table folders, string foldername, string path, boolean bAndChildren, string wildcard )
This is used internally - although you're able to use it you probably shouldn't.
Called automatically from DTree_Node:FilePopulate to actually fill the node with sub-nodes based on set preferences like should files be added, etc.
1 table files
A list of files in this folder
2 table folders
A list of folder in this folder.
3 string foldername
The folder name/path this node represents
5 boolean bAndChildren
Inherited from the FilePopulate call. Does nothing
6 string wildcard
The wildcard that was given