（一）编程原理；



　　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。



　　（二）编程实践；



　　（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。