很简单,
调用API函数,
BOOL LockWorkStation(VOID);
调用API函数,
BOOL LockWorkStation(VOID);
解决方案 »
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你最好搜索一下前面的帖子。WinNT 5 (Win2k)下用楼上的办法吧
Win9x 下可以用这些代码:
(包含窗体设计属性了)VERSION 5.00
Begin VB.Form frmLock
AutoRedraw = -1 'True
BorderStyle = 0 'None
ClientHeight = 3195
ClientLeft = 0
ClientTop = 0
ClientWidth = 4680
BeginProperty Font
Name = "宋体"
Size = 15.75
Charset = 134
Weight = 700
Underline = 0 'False
Italic = 0 'False
Strikethrough = 0 'False
EndProperty
Icon = "frmLock.frx":0000
LinkTopic = "Form1"
ScaleHeight = 3195
ScaleWidth = 4680
ShowInTaskbar = 0 'False
StartUpPosition = 3 'Windows Default
Tag = "给屏幕加锁"
Begin VB.CommandButton Command1
Caption = "Command1"
BeginProperty Font
Name = "宋体"
Size = 9
Charset = 134
Weight = 400
Underline = 0 'False
Italic = 0 'False
Strikethrough = 0 'False
EndProperty
Height = 495
Left = 1740
TabIndex = 0
Tag = "如果没有这个按钮,休想退出"
Top = 1125
Width = 1215
End
End
Attribute VB_Name = "frmLock"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit'用到的API
Private Declare Function BitBlt Lib "gdi32" (ByVal hDestDC As Long, ByVal x As Long, ByVal y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hSrcDC As Long, ByVal xSrc As Long, ByVal ySrc As Long, ByVal dwRop As Long) As Long
Private Declare Function GetDC Lib "user32" (ByVal hwnd As Long) As Long
Private Declare Function SystemParametersInfo Lib "user32" Alias "SystemParametersInfoA" (ByVal uAction As Long, ByVal uParam As Long, ByVal lpvParam As Any, ByVal fuWinIni As Long) As Long
Private Declare Function SetWindowPos Lib "user32" (ByVal hwnd As Long, ByVal hWndInsertAfter As Long, ByVal x As Long, ByVal y As Long, ByVal cx As Long, ByVal cy As Long, ByVal wFlags As Long) As LongDim nPreviousState As Long '保存系统环境状态'给屏幕加锁的函数
Public Sub LockScreen(ByVal szMsg As String)
Me.Move 0, 0, Screen.Width, Screen.Height
SetWindowPos Me.hwnd, -1, 0, 0, 0, 0, 1 Or 2
BitBlt Me.hDC, 0, 0, Screen.Width, Screen.Height, GetDC(0), 0, 0, vbSrcCopy
Me.ForeColor = vbYellow
Print szMsg
Me.ForeColor = vbBlue
Print szMsg
Me.ForeColor = vbRed
Print szMsg
Me.Show
SystemParametersInfo 97, True, nPreviousState, 0
End Sub'给屏幕解锁的函数
Public Sub UnlockScreen()
SystemParametersInfo 97, False, nPreviousState, 0
Me.Hide
End Sub'这个函数仅在调试程序时使用
Private Sub Command1_Click()
UnlockScreen
End Sub
谢谢你!我试好了就送分你。
好不好?