禁止使用 alt+f4 关闭窗口
声明：
'vb man 2001
'url: http://goodvbman.yeah.net
'e-mail: coolde@21cn.com
private declare function getsystemmenu lib "user32" alias "getsystemmenu"
(byval hwnd as long, byval brevert as long) as long
private declare function deletemenu lib "user32" (byval hmenu as long,
byval nposition as long, byval wflags as long) as long
private declare function getmenuitemcount lib "user32" (byval hmenu as
long) as long
private const mf_byposition = &h400&
使用：
private sub form_load()
'vb man 2001
'url: http://goodvbman.yeah.net
'e-mail: coolde@21cn.com
dim hwndmenu as long
dim c as long
hwndmenu = getsystemmenu(me.hwnd, 0)
c = getmenuitemcount(hwndmenu)
deletemenu hwndmenu, c - 1, mf_byposition
c = getmenuitemcount(hwndmenu)
deletemenu hwndmenu, c - 1, mf_byposition
end sub
