public delegate void GroupButtonClickEventHandler(
	Object sender,
	int start,
	int end,
	bool isClose,
	MouseEventArgs e
)

Public Delegate Sub GroupButtonClickEventHandler ( 
	sender As Object,
	start As Integer,
	end As Integer,
	isClose As Boolean,
	e As MouseEventArgs
)

public delegate void GroupButtonClickEventHandler(
	Object^ sender, 
	int start, 
	int end, 
	bool isClose, 
	MouseEventArgs^ e
)

type GroupButtonClickEventHandler = 
    delegate of 
        sender : Object * 
        start : int * 
        end : int * 
        isClose : bool * 
        e : MouseEventArgs -> unit