GlobalHookHookProc 委托

protected delegate int HookProc(
	int nCode,
	int wParam,
	IntPtr lParam
)

Protected Delegate Function HookProc ( 
	nCode As Integer,
	wParam As Integer,
	lParam As IntPtr
) As Integer

type HookProc = 
    delegate of 
        nCode : int * 
        wParam : int * 
        lParam : IntPtr -> int