VB打造超酷个性化菜单(3)

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现在到了最关键，最精彩，也是最复杂的部分了。我们最关心的就是怎样“画”菜单，怎样处理菜单事件，在MenuWndProc这个处理消息的函数里，我们要处理如下消息：WM_COMMAND（单击菜单项），WM_MEASUREITEM（处理菜单高度和宽度），WM_MENUSELECT（选择菜单项），WM_DRAWITEM（绘制菜单项）。

打开上次建好的工程，添加一个标准模块，并将其名称设置为mMenu，代码如下：

'*****************************************************
'* 本模块配合 cMenu 菜单类模块
'*
'* 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
'-=-=-=-=-=-=-=-=-=-=-=-=-=- API 函数声明 -=-=-=-=-=-=-=-=-=-=-=-=-=-Public 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
Public Declare Function CallWindowProc Lib "user32" Alias
"CallWindowProcA" (ByVal lpPrevWndFunc As Long,
ByVal hwnd As Long, ByVal Msg As Long, ByVal wParam As Long,
ByVal lParam As Long) As Long
Public Declare Function CreateCompatibleDC Lib "gdi32"
(ByVal hdc As Long) As Long
Public Declare Function CreatePen Lib "gdi32" (ByVal nPenStyle As Long,
ByVal nWidth As Long, ByVal crColor As Long) As Long
Public Declare Function CreatePopupMenu Lib "user32" () As Long
Public Declare Function CreateSolidBrush Lib "gdi32"
(ByVal crColor As Long) As Long
Public Declare Function DeleteDC Lib "gdi32" (ByVal hdc As Long) As Long
Public Declare Function DeleteMenu Lib "user32" (ByVal hMenu As Long,
ByVal nPosition As Long, ByVal wFlags As Long) As Long
Public Declare Function DeleteObject Lib "gdi32"
(ByVal hObject As Long) As Long
Public Declare Function DestroyMenu Lib "user32"
(ByVal hMenu As Long) As Long
Public Declare Function DrawEdge Lib "user32" (ByVal hdc As Long,
qrc As RECT, ByVal edge As Long, ByVal grfFlags As Long) As Long
Public Declare Function DrawIconEx Lib "user32" (ByVal hdc As Long,
ByVal xLeft As Long, ByVal yTop As Long, ByVal hIcon As Long,
ByVal cxWidth As Long,
ByVal cyWidth As Long, ByVal istepIfAniCur As Long,
ByVal hbrFlickerFreeDraw As Long, ByVal diFlags As Long) As Long
Public Declare Function DrawState Lib "user32" Alias "DrawStateA"
(ByVal hdc As Long, ByVal hBrush As Long, ByVal lpDrawStateProc As Long,
ByVal lParam As Long, ByVal wParam As Long, ByVal n1 As Long,
ByVal n2 As Long, ByVal n3 As Long, ByVal n4 As Long,
ByVal un As Long) As Long
Public Declare Function DrawText Lib "user32" Alias "DrawTextA"
(ByVal hdc As Long, ByVal lpStr As String, ByVal nCount As Long,
lpRect As RECT, ByVal wFormat As Long) As Long
Public Declare Function FillRect Lib "user32" (ByVal hdc As Long,
lpRect As RECT, ByVal hBrush As Long) As Long
Public Declare Function GetDC Lib "user32" (ByVal hwnd As Long) As Long
Public Declare Function GetMenuItemCount Lib "user32"
(ByVal hMenu As Long) As Long
Public Declare Function GetMenuItemID Lib "user32" (ByVal hMenu As Long,
ByVal nPos As Long) As Long
Public Declare Function GetMenuItemInfo Lib "user32" Alias "GetMenuItemInfoA"
(ByVal hMenu As Long, ByVal un As Long, ByVal b As Long,
lpMenuItemInfo As MENUITEMINFO) As Long
Public Declare Function GetSysColor Lib "user32" (ByVal nIndex As Long) As Long
Public Declare Function GetSystemMetrics Lib "user32"
(ByVal nIndex As Long) As Long
Public Declare Function InflateRect Lib "user32" (lpRect As RECT,
ByVal x As Long, ByVal y As Long) As Long
Public Declare Function InsertMenuItem Lib "user32" Alias "InsertMenuItemA"
(ByVal hMenu As Long, ByVal un As Long, ByVal bool As Boolean,
ByRef lpcMenuItemInfo As MENUITEMINFO) As Long
Public Declare Function LineTo Lib "gdi32" (ByVal hdc As Long, ByVal x As Long,
ByVal y As Long) As Long
Public Declare Function lstrlen Lib "kernel32" Alias "lstrlenA"
(ByVal lpString As String) As Long
Public Declare Function MoveToEx Lib "gdi32" (ByVal hdc As Long,
ByVal x As Long, ByVal y As Long, lpPoint As Long) As Long
Public Declare Function Rectangle Lib "gdi32" (ByVal hdc As Long,
ByVal X1 As Long, ByVal Y1 As Long, ByVal X2 As Long, ByVal Y2 As Long)
As Long
Public Declare Function ReleaseDC Lib "user32" (ByVal hwnd As Long,
ByVal hdc As Long) As Long
Public Declare Function SelectObject Lib "gdi32" (ByVal hdc As Long,
ByVal hObject As Long) As Long
Public Declare Function SendMessage Lib "user32" Alias "SendMessageA"
(ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long,
lParam As Any) As Long
Public Declare Function SetBkMode Lib "gdi32" (ByVal hdc As Long,
ByVal nBkMode As Long) As Long
Public Declare Function SetMenuItemInfo Lib "user32" Alias

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