VB打造超酷个性化菜单（二）
其实，漂亮的界面都是“画”出来的，菜单当然也不例外。既然是“画”出来的，就需要有窗体来接收“画”菜单这个消息，后面我们会看到，实际上不仅仅是“画”这个消息，一切关于这个菜单的消息都要有一个窗体来接收。如果你对消息不太了解，可以看看网上其它一些关于 Windows 消息机制的文章。不了解也没有关系，只要会使用就可以了，后面的文章给出了完整的源代码，而且文章的最后还给出了源代码的下载地址。
下面我们来创建接收消息的窗体：打开上次建好的工程，添加一个窗体，并将其名称设置为 frmMenu （ 注意：这一步是必须的 ）。还记得上篇文章的最后一幅图吗？菜单左边那个黑底色的附加条，为了方便，将 frmMenu 的 Picture 属性设置成那幅图。到此，这个窗体就算 OK 了！对了，就这样，因为这个窗体仅仅是为了处理消息和存储那个黑底色的风格条，我们将会对它进行子类处理，处理消息的代码全部都放在了将在下一篇中详细介绍的标准模块中。
接下来添加一个类模块，并将其名称设置为 cMenu ，代码如下：
'**************************************************************************************************************
'* 本类模块是一个菜单类 , 提供了各种样式的菜单的制作方案
'*
'* 版权 : LPP 软件工作室
'* 作者 : 卢培培 (goodname008)
'* (******* 复制请保留以上信息 *******)
'**************************************************************************************************************
Option Explicit
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, lprc As Any) As Long
Public Enum MenuUserStyle ' 菜单总体风格
STYLE_WINDOWS
STYLE_XP
STYLE_SHADE
STYLE_3D
STYLE_COLORFUL
End Enum
Public Enum MenuSeparatorStyle ' 菜单分隔条风格
MSS_SOLID
MSS_DASH
MSS_DOT
MSS_DASDOT
MSS_DASHDOTDOT
MSS_NONE
MSS_DEFAULT
End Enum
Public Enum MenuItemSelectFillStyle ' 菜单项背景填充风格
ISFS_NONE
ISFS_SOLIDCOLOR
ISFS_HORIZONTALCOLOR
ISFS_VERTICALCOLOR
End Enum
Public Enum MenuItemSelectEdgeStyle ' 菜单项边框风格
ISES_SOLID
ISES_DASH
ISES_DOT
ISES_DASDOT
ISES_DASHDOTDOT
ISES_NONE
ISES_SUNKEN
ISES_RAISED
End Enum
Public Enum MenuItemIconStyle ' 菜单项图标风格
IIS_NONE
IIS_SUNKEN
IIS_RAISED
IIS_SHADOW
End Enum
Public Enum MenuItemSelectScope ' 菜单项高亮条的范围
ISS_TEXT = &H1
ISS_ICON_TEXT = &H2
ISS_LEFTBAR_ICON_TEXT = &H4
End Enum
Public Enum MenuLeftBarStyle ' 菜单附加条风格
LBS_NONE
LBS_SOLIDCOLOR
LBS_HORIZONTALCOLOR
LBS_VERTICALCOLOR
LBS_IMAGE
End Enum
Public Enum MenuItemType ' 菜单项类型
MIT_STRING = &H0
MIT_CHECKBOX = &H200
MIT_SEPARATOR = &H800
End Enum
Public Enum MenuItemState ' 菜单项状态
MIS_ENABLED = &H0
MIS_DISABLED = &H2
MIS_CHECKED = &H8
MIS_UNCHECKED = &H0
End Enum
Public Enum PopupAlign ' 菜单弹出对齐方式
POPUP_LEFTALIGN = &H0& ' 水平左对齐
POPUP_CENTERALIGN = &H4& ' 水平居中对齐
POPUP_RIGHTALIGN = &H8& ' 水平右对齐
POPUP_TOPALIGN = &H0& ' 垂直上对齐
POPUP_VCENTERALIGN = &H10& ' 垂直居中对齐
POPUP_BOTTOMALIGN = &H20& ' 垂直下对齐
End Enum
' 释放类
Private Sub Class_Terminate()
SetWindowLong frmMenu.hwnd, GWL_WNDPROC, preMenuWndProc
Erase MyItemInfo
DestroyMenu hMenu
End Sub
' 创建弹出式菜单
Public Sub CreateMenu()
preMenuWndProc = SetWindowLong(frmMenu.hwnd, GWL_WNDPROC, AddressOf MenuWndProc)
hMenu = CreatePopupMenu()
Me.Style = STYLE_WINDOWS
End Sub
' 插入菜单项并保存自定义菜单项数组 , 设置 Owner_Draw 自绘菜单
Public Sub AddItem(ByVal itemAlias As String, ByVal itemIcon As StdPicture, ByVal itemText As String, ByVal itemType As MenuItemType, Optional ByVal itemState As MenuItemState)
Static ID As Long, i As Long
Dim ItemInfo As MENUITEMINFO
' 插入菜单项
With ItemInfo
.cbSize = LenB(ItemInfo)
.fMask = MIIM_STRING Or MIIM_FTYPE Or MIIM_STATE Or MIIM_SUBMENU Or MIIM_ID Or MIIM_DATA
.fType = itemType
.fState = itemState
.wID = ID
.dwItemData = True
.cch = lstrlen(itemText)
.dwTypeData = itemText
End With
InsertMenuItem hMenu, ID, False, ItemInfo
' 将菜单项数据存入动态数组
ReDim Preserve MyItemInfo(ID) As MyMenuItemInfo
For i = 0 To UBound(MyItemInfo)
If MyItemInfo(i).itemAlias = itemAlias Then
Class_Terminate
Err.Raise vbObjectError + 513, "cMenu", " 菜单项别名相同 ."
End If
Next i
With MyItemInfo(ID)
Set .itemIcon = itemIcon
.itemText = itemText
.itemType = itemType
.itemState = itemState
.itemAlias = itemAlias
End With
' 获得菜单项数据
With ItemInfo
.cbSize = LenB(ItemInfo)
.fMask = MIIM_DATA Or MIIM_ID Or MIIM_TYPE
End With
GetMenuItemInfo hMenu, ID, False, ItemInfo
' 设置菜单项数据
With ItemInfo
.fMask = .fMask Or MIIM_TYPE
.fType = MFT_OWNERDRAW
End With
SetMenuItemInfo hMenu, ID, False, ItemInfo
' 菜单项 ID 累加
ID = ID + 1
End Sub
' 删除菜单项
Public Sub DeleteItem(ByVal itemAlias As String)
Dim i As Long
For i = 0 To UBound(MyItemInfo)
If MyItemInfo(i).itemAlias = itemAlias Then
DeleteMenu hMenu, i, 0
Exit For
End If
Next i
End Sub
' 弹出菜单
Public Sub PopupMenu(ByVal x As Long, ByVal y As Long, ByVal Align As PopupAlign)
TrackPopupMenu hMenu, Align, x, y, 0, frmMenu.hwnd, ByVal 0
End Sub
' 设置菜单项图标
Public Sub SetItemIcon(ByVal itemAlias As String, ByVal itemIcon As StdPicture)
Dim i As Long
For i = 0 To UBound(MyItemInfo)
If MyItemInfo(i).itemAlias = itemAlias Then
Set MyItemInfo(i).itemIcon = itemIcon
Exit For
End If
Next i
End Sub
' 获得菜单项图标
Public Function GetItemIcon(ByVal itemAlias As String) As StdPicture
Dim i As Long
For i = 0 To UBound(MyItemInfo)
If MyItemInfo(i).itemAlias = itemAlias Then
Set GetItemIcon = MyItemInfo(i).itemIcon
Exit For
End If
Next i
End Function
' 设置菜单项文字
Public Sub SetItemText(ByVal itemAlias As String, ByVal itemText As String)
Dim i As Long
For i = 0 To UBound(MyItemInfo)
If MyItemInfo(i).itemAlias = itemAlias Then
MyItemInfo(i).itemText = itemText
Exit For
End If
Next i
End Sub
' 获得菜单项文字
Public Function GetItemText(ByVal itemAlias As String) As String
Dim i As Long
For i = 0 To UBound(MyItemInfo)
If MyItemInfo(i).itemAlias = itemAlias Then
GetItemText = MyItemInfo(i).itemText
Exit For
End If
Next i
End Function
' 设置菜单项状态
Public Sub SetItemState(ByVal itemAlias As String, ByVal itemState As MenuItemState)
Dim i As Long
For i = 0 To UBound(MyItemInfo)
If MyItemInfo(i).itemAlias = itemAlias Then
MyItemInfo(i).itemState = itemState
Dim ItemInfo As MENUITEMINFO
With ItemInfo
.cbSize = Len(ItemInfo)
.fMask = MIIM_STRING Or MIIM_FTYPE Or MIIM_STATE Or MIIM_SUBMENU Or MIIM_ID Or MIIM_DATA
End With
GetMenuItemInfo hMenu, i, False, ItemInfo
With ItemInfo
.fState = .fState Or itemState
End With
SetMenuItemInfo hMenu, i, False, ItemInfo
<span lang="EN" style="FONT-FAMILY: 宋