原理

　　 由于windows自身并未提供这项接口函数，因此我们必须从分析菜单的实质入手，我认为任何菜单实质上是一个没有标题栏的窗体，菜单项目是某些控件（如标签控件），通过监测鼠标是否移动到控件上而相应的改变控件的背景色和填充色，从而达到相应的目的，当然另外一项关键是如何制造出那一个倒立着的写着“windows98”字样的标题，这需要我们调用复杂的系统函数来实现。

实践

　　 （1）运行vb6，建立一个标准exe工程，添加命名为form1的窗体，放上一个command控件“command1”，caption=“开始”，调整到适当的位置,双击窗体，写入以下代码：

Private Sub Command1_Click()
　 frmTest.Show ‘当开始按钮被点击时激活超级菜单
End Sub

Private Sub Form_Load()
　 Me.left = (Screen.Width － Me.Width) / 2
　 Me.tOp = (Screen.Height － Me.Height) / 2 ‘窗体位置居中
End Sub

Private Sub Form_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
　 If frmTest.Visible = True Then
　　 Unload frmTest
　 End If ‘当鼠标离开菜单时卸载菜单
End Sub

Private Sub Form_Unload(Cancel As Integer)
　 End ‘结束程序
End Sub

　　 （2） 添加命名为frmtest的窗体，添加一个picturebox控件，命名为piclogo，采用默认值就行了，添加控件数组label1（1－－6）（读者可以根据自己的需要添加）,caption=“菜单项目”，添加一个image控件，将它的图片设计为自己喜欢的图片，移动窗体和图片到适当位置，双击窗体，写入以下代码：

　　Option Explicit
　　 Dim cL As New cLogo ‘引用类模块
　　 Private Sub Form_Load()
　　 Me.left = Form1.left
　　 Me.tOp = Form1.tOp － Form1.Height ‘指定窗体位置
　　 Me.Caption = App.Title ‘窗体标题
　　 cL.DrawingObject = picLogo ‘指定piclogo为载体
　　 cL.Caption = ″ 欢迎使用国产软件! －－zouhero 2000 ″‘文本
　　 cL.StartColor = vbBlue ‘前段颜色－蓝色
　　 cL.EndColor = vbRed ‘后段颜色－红色
　　 End Sub
　　 Private Sub Form_Resize()
　　 On Error Resume Next
　　 picLogo.Height = Me.ScaleHeight
　　 cL.Draw
　　 End Sub
　　 Private Sub Label1_Click(Index As Integer)
　　 MsgBox ″你选择了菜单″ ＆ Index, vbExclamation
　　 '在这里添加你的相应代码
　　 End Sub
　　 Private Sub Label1_MouseMove(Index As Integer, Button As Integer, Shift As Integer, X As Single, Y As Single)
　　 Dim i As Integer ‘当鼠标移动标签控件时，前景色变成白色，背景色变成蓝色
　　 Label1(Index).BackColor = vbBlue
　　 Label1(Index).ForeColor = ＆HFFFFFF
　　 For i = 0 To Label1.Count － 1 ‘其他标签颜色恢复原状
　　 If i = Index Then GoTo aa
　　 Label1(i).BackColor = vbButtonFace
　　 Label1(i).ForeColor = ＆H0
　　 aa:
　　 Next ‘恢复除选定标签外的所有标签的前景色和背景色
　　 End Sub ‘代码结束

　　 （3）选择“工程”菜单－“添加类模块”，命名为clogo，写入以下代码：

Option Explicit '以下是令人眼花缭乱的win api引用

Private Type RECT
　 left As Long
　 tOp As Long
　 Right As Long
　 Bottom As Long
End Type

Private Declare Function FillRect Lib ″user32″ (ByVal hDC As Long, lpRect As RECT, ByVal hBrush As Long) As Long

Private Declare Function CreateSolidBrush Lib ″gdi32″ (ByVal crColor As Long) As Long

Private Declare Function TextOut Lib ″gdi32″ Alias ″TextOutA″ (ByVal hDC As Long, ByVal x As Long, ByVal y As Long, ByVal lpString As String, ByVal nCount As Long) As Long

Private Declare Function GetDeviceCaps Lib ″gdi32″ (ByVal hDC As Long, ByVal nIndex As Long) As Long

Private Const LOGPIXELSX = 88

Private Const LOGPIXELSY = 90

Private Declare Function MulDiv Lib ″kernel32″ (ByVal nNumber As Long, ByVal nNumerator As Long, ByVal nDenominator As Long) As Long

Private Const LF_FACESIZE = 32

Private Type LOGFONT
　 lfHeight As Long
　 lfWidth As Long
　 lfEscapement As Long
　 lfOrientation As Long
　 lfWeight As Long
　 lfItalic As Byte
　 lfUnderline As Byte
　 lfStrikeOut As Byte
　 lfCharSet As Byte
　 lfOutPrecision As Byte
　 lfClipPrecision As Byte
　 lfQuality As Byte
　 lfPitchAndFamily As Byte
　 lfFaceName(LF_FACESIZE) As Byte
End Type

Private Declare Function CreateFontIndirect Lib ″gdi32″ Alias ″CreateFontIndirectA″ (lpLogFont As LOGFONT) As Long

Private Declare Function SelectObject Lib ″gdi32″ (ByVal hDC As Long, ByVal hObject As Long) As Long
Private Declare Function DeleteObject Lib ″gdi32″ （ByVal hObject As Long) As Long
Private Const FW_NORMAL = 400
Private Const FW_BOLD = 700
Private Const FF_DONTCARE = 0
Private Const DEFAULT_QUALITY = 0
Private Const DEFAULT_PITCH = 0
Private Const DEFAULT_CHARSET = 1
Private Declare Function OleTranslateColor Lib ″OLEPRO32.DLL″ (ByVal OLE_COLOR As Long, ByVal HPALETTE As Long, pccolorref As Long) As Long
Private Const CLR_INVALID = －1
Private m_picThis As PictureBox
Private m_sCaption As String
Private m_bRGBStart(1 To 3) As Integer
Private m_oStartColor As OLE_COLOR
Private m_bRGBEnd(1 To 3) As Integer
Private m_oEndColor As OLE_COLOR 'api声明结束

　 '以下代码建立建立类模块的出入口函数

Public Property Let Caption(ByVal sCaption As String) '
　 m_sCaption = sCaption
End Property

Public Property Get Caption() As String '标题栏文字
　 Caption = m_sCaption
End Property

Public Property Let DrawingObject(ByRef picThis As PictureBox)‘指定目标图片
　 Set m_picThis = picThis
End Property

Public Property Get StartColor() As OLE_COLOR ‘StartColor = m_oStartColor
End Property

Public Property Let StartColor(ByVal oColor As OLE_COLOR) ‘指定前段颜色
　 Dim lColor As Long
　 If (m_oStartColor <> oColor) Then
　　 m_oStartColor = oColor
　　 OleTranslateColor oColor, 0, lColor
　　 m_bRGBStart(1) = lColor And ＆HFF＆
　　 m_bRGBStart(2) = ((lColor And ＆HFF00＆) \ ＆H100)
　　 m_bRGBStart(3) = ((lColor And ＆HFF0000) \ ＆H10000)
　　 If Not (m_picThis Is Nothing) Then
　　　 Draw
　　 End If
　 End If
End Property
Public Property Get EndColor() As OLE_COLOR
　 EndColor = m_oEndColor
End Property

Public Property Let EndColor(ByVal oColor As OLE_COLOR) ‘指定后段颜色
　 Dim lColor As Long
　 If (m_oEndColor <> oColor) Then
　　 m_oEndColor = oColor
　　 OleTranslateColor oColor, 0, lColor
　　 m_bRGBEnd(1) = lColor And ＆HFF＆
　　 m_bRGBEnd(2) = ((lColor And ＆HFF00＆) \ ＆H100)
　　 m_bRGBEnd(3) = ((lColor And ＆HFF0000) \ ＆H10000)
　　 If Not (m_picThis Is Nothing) Then
　　　 Draw
　　 End If
　 End If
End Property

Public Sub Draw() ‘画背景颜色
　 Dim lHeight As Long, lWidth As Long
　 Dim lYStep As Long
　 Dim lY As Long
　 Dim bRGB(1 To 3) As Integer
　 Dim tLF As LOGFONT
　 Dim hFnt As Long
　 Dim hFntOld As Long
　 Dim lR As Long
　 Dim rct As RECT
　 Dim hBr As Long
　 Dim hDC As Long
　 Dim dR(1 To 3) As Double
　 On Error GoTo DrawError
　 hDC = m_picThis.hDC
　 lHeight = m_picThis.Height \ Screen.TwipsPerPixelY
　 rct.Right = m_picThis.Width \ Screen.TwipsPerPixelY
　 lYStep = lHeight \ 255
　 If (lYStep = 0) Then
　　 lYStep = 1
　 End If
　 rct.Bottom = lHeight
　 bRGB(1) = m_bRGBStart(1)
　 bRGB(2) = m_bRGBStart(2)
　 bRGB(3) = m_bRGBStart(3)
　 dR(1) = m_bRGBEnd(1) － m_bRGBStart(1)
　 dR(2) = m_bRGBEnd(2) － m_bRGBStart(2)
　 dR(3) = m_bRGBEnd(3) － m_bRGBStart(3)
　 For lY = lHeight To 0 Step －lYStep
　　 rct.tOp = rct.Bottom － lYStep
　　 hBr = CreateSolidBrush((bRGB(3) ＊ ＆H10000 ＋ bRGB(2) ＊ ＆H100＆ ＋ bRGB(1)))
　　 FillRect hDC, rct, hBr
　　 DeleteObject hBr
　　 rct.Bottom = rct.tOp
　　 bRGB(1) = m_bRGBStart(1) ＋ dR(1) ＊ (lHeight － lY) / lHeight
　　 bRGB(2) = m_bRGBStart(2) ＋ dR(2) ＊ (lHeight － lY) / lHeight
　　 bRGB(3) = m_bRGBStart(3) ＋ dR(3) ＊ (lHeight － lY) / lHeight
　 Next lY
　 pOLEFontToLogFont m_picThis.Font, hDC, tLF
　 tLF.lfEscapement = 900
　 hFnt = CreateFontIndirect(tLF)
　 If (hFnt <> 0) Then
　　 hFntOld = SelectObject(hDC, hFnt)
　　 lR = TextOut(hDC, 0, lHeight － 16, m_sCaption, Len(m_sCaption))
　　 SelectObject hDC, hFntOld
　　 DeleteObject hFnt
　 End If
　 m_picThis.Refresh
Exit Sub
　 DrawError:
　 Debug.Print ″Problem: ″ ＆ Err.Description
End Sub

Private Sub pOLEFontToLogFont(fntThis As StdFont, hDC As Long, tLF As LOGFONT) ‘文字字体
　 Dim sFont As String
　 Dim iChar As Integer
　 With tLF
　　 sFont = fntThis.Name
　　 For iChar = 1 To Len(sFont)
　　　 .lfFaceName(iChar － 1) =CByte(Asc(Mid＄(sFont, iChar, 1)))
　　 Next iChar
　　 .lfHeight = －MulDiv((fntThis.Size), (GetDeviceCaps(hDC, LOGPIXELSY)), 72)
　　 .lfItalic = fntThis.Italic
　　 If (fntThis.Bold) Then
　　　 .lfWeight = FW_BOLD
　　 Else
　　　 .lfWeight = FW_NORMAL
　　 End If
　　 .lfUnderline = fntThis.Underline
　　 .lfStrikeOut = fntThis.Strikethrough
　 End With
End Sub

Private Sub Class_Initialize()
　 StartColor = ＆H0
　 EndColor = vbButtonFace
End Sub ‘模块定义结束

　　 调试、运行。