用VB6建立帶光柵的超級開始菜單
原理
由于windows自身并未提供這項接口函數，因此我們必須從分析菜單的實質入手，我認為任何菜單實質上是一個沒有標題欄的窗體，菜單項目是某些控件（如標簽控件），通過監測鼠標是否移動到控件上而相應的改變控件的背景色和填充色，從而達到相應的目的，當然另外一項關鍵是如何制造出那一個倒立著的寫著“windows98”字樣的標題，這需要我們調用復雜的系統函數來實現。
實踐
（1）運行vb6，建立一個標準exe工程，添加命名為form1的窗體，放上一個command控件“command1”，caption=“開始”，調整到適當的位置,雙擊窗體，寫入以下代碼：
（2） 添加命名為frmtest的窗體，添加一個picturebox控件，命名為piclogo，采用默認值就行了，添加控件數組label1（1－－6）（讀者可以根據自己的需要添加）,caption=“菜單項目”，添加一個image控件，將它的圖片設計為自己喜歡的圖片，移動窗體和圖片到適當位置，雙擊窗體，寫入以下代碼：
（3）選擇“工程”菜單－“添加類模塊”，命名為clogo，寫入以下代碼：
調試、運行。
由于windows自身并未提供這項接口函數，因此我們必須從分析菜單的實質入手，我認為任何菜單實質上是一個沒有標題欄的窗體，菜單項目是某些控件（如標簽控件），通過監測鼠標是否移動到控件上而相應的改變控件的背景色和填充色，從而達到相應的目的，當然另外一項關鍵是如何制造出那一個倒立著的寫著“windows98”字樣的標題，這需要我們調用復雜的系統函數來實現。
實踐
（1）運行vb6，建立一個標準exe工程，添加命名為form1的窗體，放上一個command控件“command1”，caption=“開始”，調整到適當的位置,雙擊窗體，寫入以下代碼：
| Private Sub Command1_Click() frmTest.Show ‘當開始按鈕被點擊時激活超級菜單 End Sub Private Sub Form_Load() Me.left = (Screen.Width － Me.Width) / 2 Me.tOp = (Screen.Height － Me.Height) / 2 ‘窗體位置居中 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 ‘當鼠標離開菜單時卸載菜單 End Sub Private Sub Form_Unload(Cancel As Integer) End ‘結束程序 End Sub |
（2） 添加命名為frmtest的窗體，添加一個picturebox控件，命名為piclogo，采用默認值就行了，添加控件數組label1（1－－6）（讀者可以根據自己的需要添加）,caption=“菜單項目”，添加一個image控件，將它的圖片設計為自己喜歡的圖片，移動窗體和圖片到適當位置，雙擊窗體，寫入以下代碼：
| Option Explicit Dim cL As New cLogo ‘引用類模塊 Private Sub Form_Load() Me.left = Form1.left Me.tOp = Form1.tOp － Form1.Height ‘指定窗體位置 Me.Caption = App.Title ‘窗體標題 cL.DrawingObject = picLogo ‘指定piclogo為載體 cL.Caption = ″ 歡迎使用國產軟件! －－zouhero 2000 ″‘文本 cL.StartColor = vbBlue ‘前段顏色－藍色 cL.EndColor = vbRed ‘后段顏色－紅色 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 ″你選擇了菜單″ ＆ Index, vbExclamation ’在這里添加你的相應代碼 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 ‘當鼠標移動標簽控件時，前景色變成白色，背景色變成藍色 Label1(Index).BackColor = vbBlue Label1(Index).ForeColor = ＆HFFFFFF For i = 0 To Label1.Count － 1 ‘其他標簽顏色恢復原狀 If i = Index Then GoTo aa Label1(i).BackColor = vbButtonFace Label1(i).ForeColor = ＆H0 aa: Next ‘恢復除選定標簽外的所有標簽的前景色和背景色 End Sub ‘代碼結束 |
（3）選擇“工程”菜單－“添加類模塊”，命名為clogo，寫入以下代碼：
| Option Explicit ’以下是令人眼花繚亂的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聲明結束 ’以下代碼建立建立類模塊的出入口函數 Public Property Let Caption(ByVal sCaption As String) ’ m_sCaption = sCaption End Property Public Property Get Caption() As String ’標題欄文字 Caption = m_sCaption End Property Public Property Let DrawingObject(ByRef picThis As PictureBox)‘指定目標圖片 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) ‘指定前段顏色 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) ‘指定后段顏色 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() ‘畫背景顏色 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) ‘文字字體 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 ‘模塊定義結束 |
調試、運行。