VB6初步实现在WINXP下类似WIN7显示桌面的功能
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欢迎转载,但请保留以下信息: 作者:Lost_Painting 首发地址:http://blog.csdn.net/Lost_Painting/archive/2009/11/28/4894097.aspx 前段时间使用WIN7,其右下角的显示桌面功能让本人这种懒人觉得十分方便,不用去按WIN + D,或者辛苦的去点击快速开始上的"显示桌面图标"(不小心点歪了,还会启动其他进程=_=!!).只要把鼠标甩到右下角单击一下,就显示桌面了. 后来因为WIN7 X64兼容性问题,使我不得不回到WINXP时代,WINXP没有了右下角的显示桌面,很不习惯了,此时就想着自己写一个右下角显示桌面的功能. 一开始,思路是: 写一个FORM设定其位置刚好掩盖在任务栏的右下角的一个区域,高度与任务栏一样,长度自定义,然后设置为透明(透明度自定),窗口置顶HWND_TOPMOST.然后响应Form的Click事件时,调用显示桌面功能 折腾了1个小时,代码都写得差不多了,结果调试的时候发觉不对,因为任务栏也是HWND_TOPMOST,本人写的显示桌面程式首次运行时是在其上面的,但是一旦任务栏获取了焦点,显示桌面程式就会被任务栏掩盖了,再也点不到了. =_=!! 再次转变思路: 考虑调用API来修改任务栏的宽度(用FindWindow抓出任务栏的窗口句柄),预留自定义的宽度给显示桌面程式,使任务栏获取了焦点,显示桌面程式不会被任务栏掩盖.尝试了API :SetWindowPos,MoveWindow皆不行.尝试几次後,觉得是否是只修改任务栏窗口是不行的,还需要修其子窗口的宽度,逐一尝试,依然失败.(等待高手/大牛的代码实现修改任务栏宽度),所以,目前该思路对本人而言暂时进行不下去了. 然后再次转变思路:(呵呵,要曲线救国了) 不再尝试写FORM放置到任务栏上,而使用判断任务栏是否获取了焦点,在其获取焦点时,判断鼠标的坐标是否落在设定好的范围,如果是,激活显示桌面功能.这样就初步实现了,把鼠标一甩到任务栏右下角单机即可显示桌面.因为没有FORM的遮盖,所以没法用颜色或其他方式标记这个范围了,这个比较不方便. (^_^) 其中加入了写入注册表,自启动的功能,觉得不需要或者有担忧的,可以将该段代码屏蔽 (部分杀毒软件会监控注册表敏感区域的写入,可能会报警) 实现代码如下: [code=VB] VERSION 5.00 Begin VB.Form frmShow BorderStyle = 0 '没有框线 Caption = "Show" ClientHeight = 90 ClientLeft = 0 ClientTop = 0 ClientWidth = 90 Icon = "frmShow.frx":0000 LinkTopic = "frmShow" MaxButton = 0 'False MinButton = 0 'False Moveable = 0 'False ScaleHeight = 90 ScaleWidth = 90 ShowInTaskbar = 0 'False StartUpPosition = 3 '系统默认值 Visible = 0 'False WindowState = 1 '最小化 Begin VB.Timer Timer1 Left = 0 Top = 0 End End Attribute VB_Name = "frmShow" Attribute VB_GlobalNameSpace = False Attribute VB_Creatable = False Attribute VB_PredeclaredId = True Attribute VB_Exposed = False '===================================================== '说明:模仿WIN7右下角的显示桌面功能 '创建信息:Lost_Painting '创建时间:2009/11/28 '=====================================================
Option Explicit '声明API '查找窗口窗口句柄 Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" ( _ ByVal lpClassName As String _ ,ByVal lpWindowName As String _ ) As Long '查找获取焦点的窗口句柄 Private Declare Function GetForegroundWindow Lib "user32" () As Long '获取当前鼠标信息 Private Declare Function GetCursorPos Lib "user32" ( _ lpPoint As POINTAPI _ '查找窗口位置信息 Private Declare Function GetWindowRect Lib "user32" ( _ ByVal hwnd As Long _ ) As Long '鼠标X,Y坐标 Private Type POINTAPI x As Long y As Long End Type '窗口位置信息,以左上角为原点(MinX,MinY),右下为终点(MaxX,MaxY) Private Type RECT x1 As Long y1 As Long x2 As Long y2 As Long '查询 Private Declare Function RegQueryValueEx Lib "advapi32.dll" Alias "RegQueryValueExA" ( _ ByVal HKey As Long,_ ByVal lpValueName As String,sans-serif;"> ByVal lpReserved As Long,sans-serif;"> ByRef lpType As Long,sans-serif;"> ByVal lpData As String,sans-serif;"> ByRef lpcbData As Long _ '创建或改变一个键值 Private Declare Function RegSetValueEx Lib "advapi32.dll" Alias "RegSetValueExA" _ ( _ ByVal Reserved As Long,sans-serif;"> ByVal dwType As Long,sans-serif;"> lpData As Any,sans-serif;"> ByVal cbData As Long _ ) As Long '创建或改变一个键值. Private Declare Function RegCreateKey Lib "advapi32.dll" Alias "RegCreateKeyA" ( _ ByVal HKey As Long _ '关闭键值 Private Declare Function RegCloseKey Lib "advapi32.dll" ( _ Private Const HKEY_LOCAL_MACHINE = &H80000002 'HKEY_LOCAL_MACHINE Private Const REG_SZ = 1
'取得系统目录 Private Declare Function GetSystemDirectory Lib "kernel32" Alias "GetSystemDirectoryA" ( _ ByVal lpBuffer As String _ Private hwndTaskBar As Long '任务栏句柄 Private rectTaskBar As RECT '任务字段置信息 Private rectShowDesktop As RECT '显示桌面响应范围 Private Pos As POINTAPI '鼠标位置 Private oShell As Object '脚本对象
Const SHOW_DESKTOP_WIDTH As Long = 15 '显示桌面响应范围-宽 15个 PPI Const RESPONSE_TIME As Integer = 500 'Timer间隔 Const FILEPATH_MAX_LEN As Long = 255 '文件目录最大长度 Private Sub Form_Load() On Error GoTo ExitPoint '只运行一个实例 If App.PrevInstance = True Then Unload Me Exit Sub End If '设定响应时间 Timer1.Interval = RESPONSE_TIME Timer1.Enabled = True '取得任务栏的窗口句柄 hwndTaskBar = FindWindow("Shell_TrayWnd",vbNullString) '取得任务栏的窗口位置信息 GetWindowRect hwndTaskBar,rectTaskBar '根据任务栏窗口位置信息初始化显示桌面响应范围 rectShowDesktop.x1 = rectTaskBar.x2 - SHOW_DESKTOP_WIDTH rectShowDesktop.y1 = rectTaskBar.y1 rectShowDesktop.x2 = rectTaskBar.x2 rectShowDesktop.y2 = rectTaskBar.y2 '创建Shell.Application对象,调用其显示桌面功能 Set oShell = CreateObject("Shell.Application") '复制档,写入注册表 SetAutoRun '隐藏自身 Me.Hide Exit Sub ExitPoint: '出错提示并退出 MsgBox "Loading failed,Error:" & Err.Description End Sub Private Sub Timer1_Timer() On Error GoTo ExitPoint Dim hwndForeground As Long '取得当前获取焦点的窗口句柄 hwndForeground = GetForegroundWindow() '判断是否是任务栏窗口获取焦点,如果是进入 If hwndForeground = hwndTaskBar Then '获取当前鼠标位置 GetCursorPos Pos '判断落点范围是否在显示桌面响应范围 If (Pos.x >= rectShowDesktop.x1 And Pos.x <= rectShowDesktop.x2) _ And (Pos.y >= rectShowDesktop.y1 And Pos.y <= rectShowDesktop.y2) Then '显示桌面 oShell.ToggleDesktop End If Set oShell = Nothing '开机运行 Private Sub SetAutoRun() Dim HKey As Long Dim SourFilePath As String Dim hValue As String SourFilePath = """" & App.Path & "/" & App.EXEName & ".exe" & """" hValue = String(Len(SourFilePath) + 1,Chr(0)) '打开/创建键 RegCreateKey HKEY_LOCAL_MACHINE,"Software/Microsoft/Windows/CurrentVersion/Run",HKey '判断键值是否与待写入的一致 RegQueryValueEx HKey,"ShowDesktop",REG_SZ,hValue,Len(SourFilePath) + 1 If Replace(hValue,Chr(0),vbNullString) <> (SourFilePath) Then '写入运行的程序路径 RegSetValueEx HKey,ByVal SourFilePath,Len(SourFilePath) '关闭 RegCloseKey HKey End Sub [/code] 源代码下载地址: http://www.rayfile.com/zh-cn/files/2bb766d9-dbd4-11de-a9d8-0014221b798a/ （编辑：李大同） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |