用VB编写一个弹出菜单类
来源:互联网 发布:颜值高却 知乎 编辑:程序博客网 时间:2024/04/27 17:01
'类的名称为cPopupMenu
Option Explicit
'
Private Type POINT
x As Long
y As Long
End Type
'
Private Const MF_ENABLED = &H0&
Private Const MF_SEPARATOR = &H800&
Private Const MF_STRING = &H0&
Private Const TPM_RIGHTBUTTON = &H2&
Private Const TPM_LEFTALIGN = &H0&
Private Const TPM_NONOTIFY = &H80&
Private Const TPM_RETURNCMD = &H100&
Private Declare Function CreatePopupMenu Lib "user32" () As Long
Private Declare Function AppendMenu Lib "user32" Alias "AppendMenuA" (ByVal hMenu As Long, ByVal wFlags As Long, ByVal wIDNewItem As Long, ByVal sCaption As String) As Long
Private Declare Function TrackPopupMenu Lib "user32" (ByVal hMenu As Long, ByVal wFlags As Long, ByVal x As Long, ByVal y As Long, ByVal nReserved As Long, ByVal hwnd As Long, nIgnored As Long) As Long
Private Declare Function DestroyMenu Lib "user32" (ByVal hMenu As Long) As Long
Private Declare Function GetCursorPos Lib "user32" (lpPoint As POINT) As Long
Private Declare Function GetForegroundWindow Lib "user32" () As Long
Private Declare Function GetMenuString Lib "user32" Alias "GetMenuStringA" (ByVal hMenu As Long, ByVal wIDItem As Long, ByVal lpString As String, ByVal nMaxCount As Long, ByVal wFlag As Long) As Long
Private mSelMenuString As String
Public Property Get SelMenuString() As String
SelMenuString = mSelMenuString
End Property
'
Public Function Popup(ParamArray param()) As Long
Dim iMenu As Long
Dim hMenu As Long
Dim nMenus As Long
Dim p As POINT
' get the current cursor pos in screen coordinates
GetCursorPos p
' create an empty popup menu
hMenu = CreatePopupMenu()
' determine # of strings in paramarray
nMenus = 1 + UBound(param)
' put each string in the menu
For iMenu = 1 To nMenus
' the AppendMenu function has been superseeded by the InsertMenuItem
' function, but it is a bit easier to use.
If Trim$(CStr(param(iMenu - 1))) = "-" Then
' if the parameter is a single dash, a separator is drawn
AppendMenu hMenu, MF_SEPARATOR, iMenu, ""
Else
AppendMenu hMenu, MF_STRING + MF_ENABLED, iMenu, CStr(param(iMenu - 1))
End If
Next iMenu
' show the menu at the current cursor location;
' the flags make the menu aligned to the right (!); enable the right button to select
' an item; prohibit the menu from sending messages and make it return the index of
' the selected item.
' the TrackPopupMenu function returns when the user selected a menu item or cancelled
' the window handle used here may be any window handle from your application
' the return value is the (1-based) index of the menu item or 0 in case of cancelling
iMenu = TrackPopupMenu(hMenu, TPM_RIGHTBUTTON + TPM_LEFTALIGN + TPM_NONOTIFY + TPM_RETURNCMD, p.x, p.y, 0, GetForegroundWindow(), 0)
Dim result As Long
Dim buffer As String
Const MF_BYPOSITION = &H400&
buffer = Space(255)
result = GetMenuString(hMenu, (iMenu - 1), buffer, _
Len(buffer), MF_BYPOSITION)
'Debug.Print buffer
mSelMenuString = Trim(buffer)
' release and destroy the menu (for sanity)
DestroyMenu hMenu
' return the selected menu item's index
Popup = iMenu
End Function
'结束
'以下是实例,在Form上添加一个ListBox控件
Option Explicit
Private Sub Form_Load()
List1.AddItem "Right-Click here for a menu"
End Sub
Private Sub List1_MouseUp(Button As Integer, Shift As Integer, x As Single, y As Single)
Dim oMenu As cPopupMenu
Dim lMenuChosen As Long
'
If Button = VBRightButton Then
Set oMenu = New cPopupMenu
'
' Pass in the desired menu, use '-' for a separator
'
lMenuChosen = oMenu.Popup("Menu 1", "Menu 2", "Menu 3", _
"-", "Menu 4")
'
Debug.Print lMenuChosen
Debug.Print oMenu.SelMenuString
End If
'
End Sub
- 用VB编写一个弹出菜单类
- 用VB编写一个弹出菜单类
- vb 右键弹出菜单
- VB窗体弹出菜单设计
- 用vb编写一个直线拟合程序
- 用VB编写简单的程序来清空文档菜单
- 仅用css编写无限分级弹出菜单
- 仅用css编写无限分级弹出菜单
- 在VB中动态添加弹出菜单
- Android中popWindow弹出菜单的编写
- 手动编写一个弹出框
- 用VB编写一个屏幕颜色拾取器
- 用VB编写一个屏幕颜色拾取器
- 一个用VB编写ActiveX自定义控件的例子
- VB中无边框窗体实现弹出菜单
- 点击右键就弹出一个菜单
- 点击右键就弹出一个菜单
- android一个弹出菜单的动画(一)
- 常见问题:自动调整窗口内控间的大小
- 表达式编译计算器(上)
- 展示几个使用Ajax技术的站点
- 表达式编译计算器(下)
- AJAX应用解决一些常见问题
- 用VB编写一个弹出菜单类
- 实现基于Ajax的无限级菜单
- vb中从域名得到IP及从IP得到域名
- 使用异步Servlet扩展AJAX应用程序
- 3、基本函数和事件
- 使用qooxdoo轻松制作超酷软件界面
- 4、核心函数
- 新的转变 Web 2.0遭遇企业软件
- AJAX结合wiki与试算表