禁止程序多开
时 间:2008-09-08 15:09:00
作 者:andymark ID:1350 城市:深圳
摘 要:ACCESS本身也不允许程序打开多次, 但如果把程序复制到其他目录, 就可以程序多开了
有什么方法禁止上述的行为呢 , 方法有好几种, 这里介绍CreateMutex 建立互斥体
正 文:
ACCESS本身也不允许程序打开多次, 但如果把程序复制到其他目录, 就可以程序多开了
有什么方法禁止上述的行为呢 , 方法有好几种, 这里介绍CreateMutex 建立互斥体
模块代码
Private Declare Function CreateMutex Lib "kernel32" Alias "CreateMutexA" (ByVal lpMutexAttributes As Long, ByVal bInitialOwner As Long, ByVal lpName As String) As Long
Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long
'variable constant to match if the mutex exists
Private Const ERROR_ALREADY_EXISTS = 183&
'Application Variable Declarations
Public Const AppVer = "MyApp v1.1"
Public Function Test()
Dim Mutexvalue As Long
'*the following code would go in the starting function of your application
'either the main() or form_load() depending on how your application works
'Create an individual mutex value for the application
Mutexvalue = CreateMutex(ByVal 0&, 1, AppVer)
Debug.Print Mutexvalue
'If an error occured creating the mutex, that means it
'must have already existed, therefore your application
'is already running
If (Err.LastDllError = ERROR_ALREADY_EXISTS) Then
'Inform the user of running the same app twice
MsgBox "The application is already running."
'Terminate the application via the reference to it, its hObject value
CloseHandle Mutexvalue
Application.Quit acQuitSaveNone
End If
End Function
Access软件网QQ交流群 (群号:54525238) Access源码网店
常见问答:
技术分类:
源码示例
- 【源码QQ群号19834647...(12.17)
- 【Access选项卡示例】Ac...(09.09)
- 【Access源码示例】按输入...(09.02)
- 【Access日期区间段查询】...(08.29)
- 【Access日期区间段查询】...(08.27)
- Access怎样才能实现日期时...(08.21)
- 【Access定时打开查询】A...(08.19)
- Access生成固定数量的记录...(08.13)
- Access怎样才能实现日期时...(08.12)
- Access利用导航窗体控件对...(08.03)
学习心得
最新文章
- Access表中的字段名、字段标题...(09.19)
- Access快速开发平台--更改“...(09.18)
- 【中秋及国庆优惠】Access培训...(09.15)
- Access如何将日期型的数值转换...(09.14)
- 英文输入法输入数据中存在单引号引起...(09.11)
- 【Access选项卡示例】Acce...(09.09)
- 让Access光标停留在指定的控件...(09.07)
- 关于Access查询条件里使用通配...(09.06)
- Access报表偷懒制作法--Ac...(09.05)
- Access快速开发平台--窗体数...(09.04)