أريد التسأول عن التابع systemparametesinfo الرجاء النظر الى الصفحة ذات الرقم
Q182382 من الmsdn هذا الكود لايعمل
الفكرة أني أريد أستخدامه من أجل قفل النظام في كل من win9x & win2000
ولكن عند أستدعاء هذا التابع من قبل برنامجي فأنه لاينفذ أية شي
الرجاء المساعدة
ملاحظة :
أنا مبرمج vb.net or vb6
وشكرا .
Imports System.Runtime.InteropServices
Public Class form1
Inherits System.Windows.Forms.Form
Declare Auto Function SystemParametersInfo Lib "user32.dll" Alias "SystemParametersInfoA" ( _
ByVal uAction As Integer, _
ByVal uParam As Integer, _
ByVal lpvParam As VariantType, _
ByVal fuWinIni As Integer) As Integer
Const SPI_SCREENSAVERRUNNING = 97
Public prev As VariantType
Declare Function SetWindowsHookEx Lib "user32.dll" Alias "SetWindowsHookExA" (ByVal idHook As Long, ByVal lpfn As Long, ByVal hmod As Long, ByVal dwThreadId As Long) As Long
#Region " Windows Form Designer generated code "
Public Sub New()
MyBase.New()
'This call is required by the Windows Form Designer.
InitializeComponent()
'Add any initialization after the InitializeComponent() call
End Sub
'Form overrides dispose to clean up the component list.
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub
'Required by the Windows Form Designer
Private components As System.ComponentModel.IContainer
'NOTE: The following procedure is required by the Windows Form Designer
'It can be modified using the Windows Form Designer.
'Do not modify it using the code editor.
Friend WithEvents Button1 As System.Windows.Forms.Button
Friend WithEvents Button2 As System.Windows.Forms.Button
Private Sub InitializeComponent()
Me.Button1 = New System.Windows.Forms.Button()
Me.Button2 = New System.Windows.Forms.Button()
Me.Button3 = New System.Windows.Forms.Button()
Me.SuspendLayout()
'
'Button1
'
Me.Button1.Location = New System.Drawing.Point(168, 216)
Me.Button1.Name = "Button1"
Me.Button1.Size = New System.Drawing.Size(112, 23)
Me.Button1.TabIndex = 0
Me.Button1.Text = "stop alt+ctr+del"
'
'Button2
'
Me.Button2.Location = New System.Drawing.Point(40, 216)
Me.Button2.Name = "Button2"
Me.Button2.Size = New System.Drawing.Size(112, 23)
Me.Button2.TabIndex = 1
Me.Button2.Text = "run "
'
'Button3
'
Me.Button3.Location = New System.Drawing.Point(128, 120)
Me.Button3.Name = "Button3"
Me.Button3.TabIndex = 2
Me.Button3.Text = "Button3"
'
'form1
'
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(292, 273)
Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.Button3, Me.Button2, Me.Button1})
Me.Name = "form1"
Me.Text = "Form1"
Me.ResumeLayout(False)
End Sub
#End Region
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Call SystemParametersInfo(SPI_SCREENSAVERRUNNING, True, prev, 1)
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Call SystemParametersInfo(SPI_SCREENSAVERRUNNING, False, prev, 0)
End Sub
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
End Sub
Friend WithEvents Button3 As System.Windows.Forms.Button
End Class