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。
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