[wxhaskell-users] treeCtrl Ptr arguments

[David W. <da...@dt...>]

Hi!

the Documentation for the treeCtrlGetFirstChild says: 

treeCtrlGetFirstChild :: TreeCtrl a -> TreeItem -> Ptr CInt -> IO TreeItem   
usage: (treeCtrlGetFirstChild obj item cookie).

what's up with the Ptr Cint? How do I construct one and what should it 
point to?

/David Waern