vb.net设置焦点,vb窗体失去焦点

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vb.net设置windows焦点程序

给你个参考的例子，窗体打开时可能大小有变化，软件名可能有变化

先加个控件ListBox1，运行后双击ListBox1上程序名

Public Class Form1

Public myProcess() As Process

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

Dim myProcesses() As Process = Process.GetProcesses()

Dim jh As New ArrayList

For Each bs As Process In myProcesses

If CInt(bs.MainWindowHandle) 0 Then

ListBox1.Items.Add(bs.ProcessName)

jh.Add(bs)

End If

ReDim myProcess(jh.Count - 1)

jh.CopyTo(myProcess)

End Sub

Declare Function ShowWindow Lib "user32" Alias "ShowWindow" (ByVal hwnd As Integer, ByVal nCmdShow As Long) As Integer

Private Sub ListBox1_MouseDoubleClick(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles ListBox1.MouseDoubleClick

Dim a As Process = myProcess(ListBox1.SelectedIndex)

Try

Dim dd = ShowWindow(a.MainWindowHandle, H1)

AppActivate(a.Id)

Catch ex As Exception

End Try

End Sub

End Class