public delegate int TaskDialogCallback(
	IntPtr hwnd,
	uint msg,
	IntPtr wParam,
	IntPtr lParam,
	IntPtr lpRefData
)

Public Delegate Function TaskDialogCallback ( _
	hwnd As IntPtr, _
	msg As UInteger, _
	wParam As IntPtr, _
	lParam As IntPtr, _
	lpRefData As IntPtr _
) As Integer

public delegate int TaskDialogCallback(
	IntPtr hwnd, 
	unsigned int msg, 
	IntPtr wParam, 
	IntPtr lParam, 
	IntPtr lpRefData
)