vb点虐 新的进程 vbnet update

vb点虐 如何完全关闭子窗口的所有进程?在线等~

这样的话你就不要直接把子窗口show出来，先在父窗口创建一个子窗口对象的变量，通过实例化该变量达到创建子窗口的目的，然后在下次又要打开子窗口时也可以通过该变量关闭原有的子窗口

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示例代码如下(假设Form1为父窗口，Form2为子窗口):

Form1的代码:

Public

Class

Form1

Dim

nform

As

Form2

=

Nothing

Private

Sub

Button1_Click(ByVal

sender

As

System.Object,

ByVal

e

As

System.EventArgs)

Handles

Button1.Click

If

nform

IsNot

Nothing

Then

nform.Close()

nform.Dispose()

End

If

nform

=

New

Form2

nform.Show()

Me.Hide()

End

Sub

End

Class

通过nform变量，你可以很轻易就处理掉原来已经打开但隐藏着的子窗口了

vb点虐 中如何设置进程的基本优先级

下面的代码示例说明了更改线程优先级的结果。创建两个线程，其中一个线程的优先级设置为 BelowNormal。两个线程在 while 循环中都增加一个变量，并运行一段设定的时间。

Option Explicit

Option Strict

Imports System

Imports System.Threading

Public Class Test

MTAThread _

Shared Sub Main()

Dim priorityTest As New PriorityTest()

Dim threadOne As Thread = _

New Thread(AddressOf priorityTest.ThreadMethod)

threadOne.Name = "ThreadOne"

Dim threadTwo As Thread = _

New Thread(AddressOf priorityTest.ThreadMethod)

threadTwo.Name = "ThreadTwo"

threadTwo.Priority = ThreadPriority.BelowNormal

threadOne.Start()

threadTwo.Start()

' Allow counting for 10 seconds.

Thread.Sleep(10000)

priorityTest.LoopSwitch = False

End Sub

End Class

Public Class PriorityTest

Dim loopSwitchValue As Boolean

Sub New()

loopSwitchValue = True

End Sub

WriteOnly Property LoopSwitch As Boolean

Set

loopSwitchValue = Value

End Set

End Property

Sub ThreadMethod()

Dim threadCount As Long = 0

While loopSwitchValue

threadCount += 1

End While

Console.WriteLine("{0} with {1,11} priority " _

"has a count = {2,13}", Thread.CurrentThread.Name, _

Thread.CurrentThread.Priority.ToString(), _

threadCount.ToString("N0"))

End Sub

End Class

VB点虐 在Windows7下检测进程是否存在

VB点虐 （VS2008）里面比C#还好弄，不需要自己加manifest，直接在项目属性的“应用程序”里面点击“查看UAC设置”，在新打开的app.manifest里面把 requestedExecutionLevel level="asInvoker" uiAccess="false" / 替换成 requestedExecutionLevel level="requireAdministrator" uiAccess="false" / 再编译就行了。