vb.net取消窗口关闭,c#取消关闭窗口

VB中怎么实现关闭窗口？

VB中关闭窗口直接使用Unload就可以。\x0d\x0aUnload语句卸载 Form对象或控件。\x0d\x0a其语法: Unload object \x0d\x0aobject 所在处是要卸载的 Form 对象或控件数组元素的名称。 \x0d\x0a\x0d\x0a例子：点击按钮弹出Form2窗体，关闭自身窗体\x0d\x0aPrivate Sub Command1_Click()\x0d\x0a Form2.Show' 弹出form2\x0d\x0a Unload Me‘关闭自身窗体\x0d\x0aEnd Sub

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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中窗体中的缩小,放大,关闭可以去掉吗?

可以，属性controlBox 为false可以去掉三个按钮，另外还有maximize,minimize 可以分别控制最大化和最小化按钮的显示。

vb.net让窗口关闭时,取消关闭,隐藏窗口

问题补充：我用VB.NET写的，FORM2用来实现数据采样并显示实时曲线，关闭后再'取消FORM2的关闭 这样就把FORM2隐藏起来了，需要调出来的时候只需以下代码

vb.net退出这个form窗口怎么同时取消对图片的占用？

只需要用变量存储 Image 对象，然后不需要的时候释放掉就行了。

Dim img1 As Image

img1 = Image.FromFile(pic)

PictureBox1.Image = img1

'窗口关闭时

img1 = Nothing

如满意，请采纳。

VB.NET 窗体关闭问题 用的是vs2013

首先这个应该放在 FormClosing 事件中。

其次，因为你 Else 之后没有忽略窗体关闭的请求。

应该再加一句 e.Cancel = True，表示告诉系统，我取消关闭窗体这个操作了。