public delegate void QiFutureCancel(
	IntPtr promise,
	IntPtr userdata
)

Public Delegate Sub QiFutureCancel ( 
	promise As IntPtr,
	userdata As IntPtr
)

public delegate void QiFutureCancel(
	IntPtr promise, 
	IntPtr userdata
)

type QiFutureCancel = 
    delegate of 
        promise : IntPtr * 
        userdata : IntPtr -> unit