vb禁止窗口关闭命令

1、窗体属性ControlBox=False则不显示关闭、最大化、最小化按钮

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2、如果还想保留最大化、最小化按钮，仅仅不允许关窗口，可以

Private Sub Form_QueryUnload(Cancel As Integer, UnloadMode As Integer)

Cancel = True

End Sub

在vb里，如何将窗口右上方的“关闭”按钮设为禁用？？

复制以下代码就可以实现将窗口右上方的“关闭”按钮设为禁用

Option Explicit

Private Declare Function GetSystemMenu Lib "user32"_

(ByVal hwnd As Long, ByVal bRevert As Long) As Long

Private Declare Function GetMenuItemCount Lib "user32"_

(ByVal hMenu As Long) As Long

Private Declare Function RemoveMenu Lib "user32"_

(ByVal hMenu As Long, ByVal nPosition As Long, ByVal wFlags As Long) As Long

Private Declare Function DrawMenuBar Lib "user32"_

(ByVal hwnd As Long) As Long

Private Const MF_BYPOSITION = H400

Private Const MF_REMOVE = H1000

Private Sub DisableX()

Dim hMenu As Long

Dim nCount As Long

hMenu = GetSystemMenu(Me.hWnd, 0)

nCount = GetMenuItemCount(hMenu)

'Get rid of the Close menu and its separator

Call RemoveMenu(hMenu, nCount - 1, MF_REMOVE Or MF_BYPOSITION)

Call RemoveMenu(hMenu, nCount - 2, MF_REMOVE Or MF_BYPOSITION)

'Make sure the screen updates

'our change DrawMenuBar Me.hWnd

End Sub

Private Sub Form_Load()

DisableX

End Sub

Private Sub Form_Click()

'We need a way out, since the X button'doesn't work :-)

Unload Me

End Sub

VB2008 如何取消窗体的关闭按钮

设置ControlBox为False是可以的，不过全部按钮都会消失（包括最小化，最大化）

用API可以单独把关闭按钮干掉……

'VB.NET Code

Public Class Form1

Private Declare Function GetSystemMenu Lib "User32 " (ByVal hwnd As Integer, ByVal bRevert As Long) As Integer

Private Declare Function RemoveMenu Lib "User32 " (ByVal hMenu As Integer, ByVal nPosition As Integer, ByVal wFlags As Integer) As Integer

Private Declare Function DrawMenuBar Lib "User32 " (ByVal hwnd As Integer) As Integer

Private Declare Function GetMenuItemCount Lib "User32 " (ByVal hMenu As Integer) As Integer

Private Const MF_BYPOSITION = H400

Private Const MF_DISABLED = H2

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

Dim hMenu As Integer, nCount As Integer

hMenu = GetSystemMenu(Me.Handle.ToInt32, 0)

nCount = GetMenuItemCount(hMenu)

'Debug.Print(nCount)

Call RemoveMenu(hMenu, nCount - 1, MF_DISABLED Or MF_BYPOSITION)

DrawMenuBar(Me.Handle.ToInt32)

End Sub

End Class

'VB6 code =============================================================

Private Declare Function GetSystemMenu Lib "User32 " (ByVal hwnd As Long, ByVal bRevert As Long) As Integer

Private Declare Function RemoveMenu Lib "User32 " (ByVal hMenu As Long, ByVal nPosition As Long, ByVal wFlags As Long) As Long

Private Declare Function DrawMenuBar Lib "User32 " (ByVal hwnd As Long) As Long

Private Declare Function GetMenuItemCount Lib "User32 " (ByVal hMenu As Long) As Long

Private Const MF_BYPOSITION = H400

Private Const MF_DISABLED = H2

Private Sub Form1_Load()

Dim hMenu As Long, nCount As Long

hMenu = GetSystemMenu(Me.hWnd, 0)

nCount = GetMenuItemCount(hMenu)

'Debug.Print nCount

Call RemoveMenu(hMenu, nCount - 1, MF_DISABLED Or MF_BYPOSITION)

DrawMenuBar Me.hWnd

End Sub

vb.net中 如何将窗体上的关闭按钮禁用 也就是变灰啊？

FormBorderStyle选为None，没有标题栏

form 的 controlbox 属性为false

VB如何恢复被ModifyMenu禁用窗体关闭按钮

'禁用关闭菜单

ModifyMenu GetSystemMenu(Me.hwnd, 0), SC_CLOSE, MF_GRAYED, 7, "不允许关闭"

将菜单ID为SC_CLOSE设置为菜单索引7的菜单项，并禁用关闭菜单

'恢复禁用的关闭菜单

ModifyMenu GetSystemMenu(Me.hwnd, 0), 7, MF_ENABLED, SC_CLOSE, "允许关闭"

将菜单的索引为7的菜单项重新设置回菜单ID，并启用关闭菜单

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