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blog名称:Rabbit's Blog--我的blog我做主
日志总数:52
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建立时间:2005年12月7日




ASP程序调用验证码
文章收藏,  电脑与网络

开心兔子 发表于 2006/11/30 14:15:53

调用方法<img src="getcode.asp"><input name="vcode" type="input">在服务器验证的时候Session("GetCode") = Request.Form("vcode") 文件GetCode.asp<%Const nMaxSaturation = 100   ' 最大色彩饱和度Const nBlankNoisyDotOdds = 0.2  ' 空白处噪点率Const nColorNoisyDotOdds = 0.1 ' 有色处噪点率Const nCharCount = 4      ' 产生的字符个数Const nPixelWidth = 20     ' 单个字符位图的宽度Const nPixelHeight = 20       ' 单个字符位图的高度Const nColorHue = 220      ' 显示验证码的色调(-1表示随机色调, -2表示灰度色调)Const nAngleRandom = 10         ' 角度随机量Const nLengthRandom = 10        ' 长度随机量(百分比)Const cCharSet = "0123456789"                                ' 构成验证码的字符集                                ' 如果扩充了下边的字母矢量库，则可以相应扩充这个字符集 Dim Buf(), DigtalStrDim Lines(), LineCountDim CursorX, CursorY, DirX, DirY RandomizeCall CreatValidCode("GetCode") Sub CDGen_Reset() ' 复位矢量笔和环境变量 LineCount = 0 CursorX = 0 CursorY = 0 ' 初始的光笔方向是垂直向下 DirX = 0 DirY = 1End Sub Sub CDGen_Clear() ' 清空位图阵列 Dim i, j ReDim Buf(nPixelHeight - 1, nCharCount * nPixelWidth - 1)  For j = 0 To nPixelHeight - 1  For i = 0 To nCharCount * nPixelWidth - 1   Buf(j, i) = 0  Next NextEnd Sub Sub CDGen_PSet(X, Y) ' 在位图阵列上画点 Buf(Y, X) = 1End Sub Sub CDGen_Line(X1, Y1, X2, Y2) ' 在位图阵列上画线 Dim DX, DY, DeltaT, i  DX = X2 - X1 DY = Y2 - Y1 If Abs(DX) > Abs(DY) Then DeltaT = Abs(DX) Else DeltaT = Abs(DY) For i = 0 To DeltaT  CDGen_PSet X1 + DX * i / DeltaT, Y1 + DY * i / DeltaT NextEnd Sub Sub CDGen_FowardDraw(nLength) ' 按当前光笔方向绘制指定长度并移动光笔，正数表示从左向右/从上向下绘制，负数表示从右向左/从下向上绘制 nLength = Sgn(nLength) * Abs(nLength) * (1 - nLengthRandom / 100 + Rnd * nLenghtRandom * 2 / 100) ReDim Preserve Lines(3, LineCount) Lines(0, LineCount) = CursorX Lines(1, LineCount) = CursorY CursorX = CursorX + DirX * nLength CursorY = CursorY + DirY * nLength Lines(2, LineCount) = CursorX Lines(3, LineCount) = CursorY LineCount = LineCount + 1End Sub Sub CDGen_SetDirection(nAngle) ' 按指定角度设定画笔方向, 正数表示相对当前方向顺时针改变方向，负数表示相对当前方向逆时针改变方向 Dim DX, DY  nAngle = Sgn(nAngle) * (Abs(nAngle) - nAngleRandom + Rnd * nAngleRandom * 2) / 180 * 3.1415926 DX = DirX DY = DirY DirX = DX * Cos(nAngle) - DY * Sin(nAngle) DirY = DX * Sin(nAngle) + DY * Cos(nAngle)End Sub Sub CDGen_MoveToMiddle(nActionIndex, nPercent) ' 将画笔光标移动到指定动作的中间点上，nPercent为中间位置的百分比 Dim DeltaX, DeltaY  DeltaX = Lines(2, nActionIndex) - Lines(0, nActionIndex) DeltaY = Lines(3, nActionIndex) - Lines(1, nActionIndex) CursorX = Lines(0, nActionIndex) + Sgn(DeltaX) * Abs(DeltaX) * nPercent / 100 CursorY = Lines(1, nActionIndex) + Sgn(DeltaY) * Abs(DeltaY) * nPercent / 100End Sub Sub CDGen_MoveCursor(nActionIndex) ' 将画笔光标移动到指定动作的起始点上 CursorX = Lines(0, nActionIndex) CursorY = Lines(1, nActionIndex)End Sub Sub CDGen_Close(nActionIndex) ' 将当前光笔位置与指定动作的起始点闭合并移动光笔 ReDim Preserve Lines(3, LineCount) Lines(0, LineCount) = CursorX Lines(1, LineCount) = CursorY CursorX = Lines(0, nActionIndex) CursorY = Lines(1, nActionIndex) Lines(2, LineCount) = CursorX Lines(3, LineCount) = CursorY LineCount = LineCount + 1End Sub Sub CDGen_CloseToMiddle(nActionIndex, nPercent) ' 将当前光笔位置与指定动作的中间点闭合并移动光笔，nPercent为中间位置的百分比 Dim DeltaX, DeltaY  ReDim Preserve Lines(3, LineCount) Lines(0, LineCount) = CursorX Lines(1, LineCount) = CursorY DeltaX = Lines(2, nActionIndex) - Lines(0, nActionIndex) DeltaY = Lines(3, nActionIndex) - Lines(1, nActionIndex) CursorX = Lines(0, nActionIndex) + Sgn(DeltaX) * Abs(DeltaX) * nPercent / 100 CursorY = Lines(1, nActionIndex) + Sgn(DeltaY) * Abs(DeltaY) * nPercent / 100 Lines(2, LineCount) = CursorX Lines(3, LineCount) = CursorY LineCount = LineCount + 1End Sub Sub CDGen_Flush(X0, Y0) ' 按照当前的画笔动作序列绘制位图点阵 Dim MaxX, MinX, MaxY, MinY Dim DeltaX, DeltaY, StepX, StepY, OffsetX, OffsetY Dim i  MaxX = MinX = MaxY = MinY = 0 For i = 0 To LineCount - 1  If MaxX < Lines(0, i) Then MaxX = Lines(0, i)  If MaxX < Lines(2, i) Then MaxX = Lines(2, i)  If MinX > Lines(0, i) Then MinX = Lines(0, i)  If MinX > Lines(2, i) Then MinX = Lines(2, i)  If MaxY < Lines(1, i) Then MaxY = Lines(1, i)  If MaxY < Lines(3, i) Then MaxY = Lines(3, i)  If MinY > Lines(1, i) Then MinY = Lines(1, i)  If MinY > Lines(3, i) Then MinY = Lines(3, i) Next DeltaX = MaxX - MinX DeltaY = MaxY - MinY If DeltaX = 0 Then DeltaX = 1 If DeltaY = 0 Then DeltaY = 1 MaxX = MinX MaxY = MinY If DeltaX > DeltaY Then  StepX = (nPixelWidth - 2) / DeltaX  StepY = (nPixelHeight - 2) / DeltaX  OffsetX = 0  OffsetY = (DeltaX - DeltaY) / 2 Else  StepX = (nPixelWidth - 2) / DeltaY  StepY = (nPixelHeight - 2) / DeltaY  OffsetX = (DeltaY - DeltaX) / 2  OffsetY = 0 End If For i = 0 To LineCount - 1  Lines(0, i) = Round((Lines(0, i) - MaxX + OffsetX) * StepX, 0)  If Lines(0, i) < 0 Then Lines(0, i) = 0  If Lines(0, i) >= nPixelWidth - 2 Then Lines(0, i) = nPixelWidth - 3  Lines(1, i) = Round((Lines(1, i) - MaxY + OffsetY) * StepY, 0)  If Lines(1, i) < 0 Then Lines(1, i) = 0  If Lines(1, i) >= nPixelHeight - 2 Then Lines(1, i) = nPixelHeight - 3  Lines(2, i) = Round((Lines(2, i) - MinX + OffsetX) * StepX, 0)  If Lines(2, i) < 0 Then Lines(2, i) = 0  If Lines(2, i) >= nPixelWidth - 2 Then Lines(2, i) = nPixelWidth - 3  Lines(3, i) = Round((Lines(3, i) - MinY + OffsetY) * StepY, 0)  If Lines(3, i) < 0 Then Lines(3, i) = 0  If Lines(3, i) >= nPixelHeight - 2 Then Lines(3, i) = nPixelHeight - 3  CDGen_Line Lines(0, i) + X0 + 1, Lines(1, i) + Y0 + 1, Lines(2, i) + X0 + 1, Lines(3, i) + Y0 + 1 NextEnd Sub Sub CDGen_Char(cChar, X0, Y0) ' 在指定坐标处生成指定字符的位图阵列 CDGen_Reset Select Case cChar Case "0"  CDGen_SetDirection -60                            ' 逆时针60度(相对于垂直线)  CDGen_FowardDraw -0.7                             ' 反方向绘制0.7个单位  CDGen_SetDirection -60                            ' 逆时针60度  CDGen_FowardDraw -0.7                             ' 反方向绘制0.7个单位  CDGen_SetDirection 120                            ' 顺时针120度  CDGen_FowardDraw 1.5                              ' 绘制1.5个单位  CDGen_SetDirection -60                            ' 逆时针60度  CDGen_FowardDraw 0.7                              ' 绘制0.7个单位  CDGen_SetDirection -60                            ' 顺时针120度  CDGen_FowardDraw 0.7                              ' 绘制0.7个单位  CDGen_Close 0                                     ' 封闭当前笔与第0笔(0开始) Case "1"  CDGen_SetDirection -90                            ' 逆时针90度(相对于垂直线)  CDGen_FowardDraw 0.5                              ' 绘制0.5个单位  CDGen_MoveToMiddle 0, 50                          ' 移动画笔的位置到第0笔(0开始)的50%处  CDGen_SetDirection 90                             ' 逆时针90度  CDGen_FowardDraw -1.4                             ' 反方向绘制1.4个单位  CDGen_SetDirection 30                             ' 逆时针30度  CDGen_FowardDraw 0.4                              ' 绘制0.4个单位 Case "2"  CDGen_SetDirection 45                             ' 顺时针45度(相对于垂直线)  CDGen_FowardDraw -0.7                             ' 反方向绘制0.7个单位  CDGen_SetDirection -120                           ' 逆时针120度  CDGen_FowardDraw 0.4                              ' 绘制0.4个单位  CDGen_SetDirection 60                             ' 顺时针60度  CDGen_FowardDraw 0.6                              ' 绘制0.6个单位  CDGen_SetDirection 60                             ' 顺时针60度  CDGen_FowardDraw 1.6                              ' 绘制1.6个单位  CDGen_SetDirection -135                           ' 逆时针135度  CDGen_FowardDraw 1.0                              ' 绘制1.0个单位 Case "3"  CDGen_SetDirection -90                            ' 逆时针90度(相对于垂直线)  CDGen_FowardDraw 0.8                              ' 绘制0.8个单位  CDGen_SetDirection 135                            ' 顺时针135度  CDGen_FowardDraw 0.8                              ' 绘制0.8个单位  CDGen_SetDirection -120                           ' 逆时针120度  CDGen_FowardDraw 0.6                              ' 绘制0.6个单位  CDGen_SetDirection 80                             ' 顺时针80度  CDGen_FowardDraw 0.5                              ' 绘制0.5个单位  CDGen_SetDirection 60                             ' 顺时针60度  CDGen_FowardDraw 0.5                              ' 绘制0.5个单位  CDGen_SetDirection 60                             ' 顺时针60度  CDGen_FowardDraw 0.5                              ' 绘制0.5个单位 Case "4"  CDGen_SetDirection 20                             ' 顺时针20度(相对于垂直线)  CDGen_FowardDraw 0.8                              ' 绘制0.8个单位  CDGen_SetDirection -110                           ' 逆时针110度  CDGen_FowardDraw 1.2                              ' 绘制1.2个单位  CDGen_MoveToMiddle 1, 60                          ' 移动画笔的位置到第1笔(0开始)的60%处  CDGen_SetDirection 90                             ' 顺时针90度  CDGen_FowardDraw 0.7                              ' 绘制0.7个单位  CDGen_MoveCursor 2                                ' 移动画笔到第2笔(0开始)的开始处  CDGen_FowardDraw -1.5                             ' 反方向绘制1.5个单位 Case "5"  CDGen_SetDirection 90                             ' 顺时针90度(相对于垂直线)  CDGen_FowardDraw 1.0                              ' 绘制1.0个单位  CDGen_SetDirection -90                            ' 逆时针90度  CDGen_FowardDraw 0.8                              ' 绘制0.8个单位  CDGen_SetDirection -90                            ' 逆时针90度  CDGen_FowardDraw 0.8                              ' 绘制0.8个单位  CDGen_SetDirection 30                             ' 顺时针30度  CDGen_FowardDraw 0.4                              ' 绘制0.4个单位  CDGen_SetDirection 60                             ' 顺时针60度  CDGen_FowardDraw 0.4                              ' 绘制0.4个单位  CDGen_SetDirection 30                             ' 顺时针30度  CDGen_FowardDraw 0.5                              ' 绘制0.5个单位  CDGen_SetDirection 60                             ' 顺时针60度  CDGen_FowardDraw 0.8                              ' 绘制0.8个单位 Case "6"  CDGen_SetDirection -60                            ' 逆时针60度(相对于垂直线)  CDGen_FowardDraw -0.7                             ' 反方向绘制0.7个单位  CDGen_SetDirection -60                            ' 逆时针60度  CDGen_FowardDraw -0.7                             ' 反方向绘制0.7个单位  CDGen_SetDirection 120                            ' 顺时针120度  CDGen_FowardDraw 1.5                              ' 绘制1.5个单位  CDGen_SetDirection 120                            ' 顺时针120度  CDGen_FowardDraw -0.7                             ' 反方向绘制0.7个单位  CDGen_SetDirection 120                            ' 顺时针120度  CDGen_FowardDraw 0.7                              ' 绘制0.7个单位  CDGen_SetDirection 120                            ' 顺时针120度  CDGen_FowardDraw -0.7                             ' 反方向绘制0.7个单位  CDGen_SetDirection 120                            ' 顺时针120度  CDGen_FowardDraw 0.5                              ' 绘制0.5个单位  CDGen_CloseToMiddle 2, 50                         ' 将当前画笔位置与第2笔(0开始)的50%处封闭 Case "7"  CDGen_SetDirection 180                            ' 顺时针180度(相对于垂直线)  CDGen_FowardDraw 0.3                              ' 绘制0.3个单位  CDGen_SetDirection 90                             ' 顺时针90度  CDGen_FowardDraw 0.9                              ' 绘制0.9个单位  CDGen_SetDirection 120                            ' 顺时针120度  CDGen_FowardDraw 1.3                              ' 绘制1.3个单位 Case "8"  CDGen_SetDirection -60                            ' 逆时针60度(相对于垂直线)  CDGen_FowardDraw -0.8                             ' 反方向绘制0.8个单位  CDGen_SetDirection -60                            ' 逆时针60度  CDGen_FowardDraw -0.8                             ' 反方向绘制0.8个单位  CDGen_SetDirection 120                            ' 顺时针120度  CDGen_FowardDraw 0.8                              ' 绘制0.8个单位  CDGen_SetDirection 110                            ' 顺时针110度  CDGen_FowardDraw -1.5                             ' 反方向绘制1.5个单位  CDGen_SetDirection -110                           ' 逆时针110度  CDGen_FowardDraw 0.9                              ' 绘制0.9个单位  CDGen_SetDirection 60                             ' 顺时针60度  CDGen_FowardDraw 0.8                              ' 绘制0.8个单位  CDGen_SetDirection 60                             ' 顺时针60度  CDGen_FowardDraw 0.8                              ' 绘制0.8个单位  CDGen_SetDirection 60                             ' 顺时针60度  CDGen_FowardDraw 0.9                              ' 绘制0.9个单位  CDGen_SetDirection 70                             ' 顺时针70度  CDGen_FowardDraw 1.5                             ' 绘制1.5个单位  CDGen_Close 0                                     ' 封闭当前笔与第0笔(0开始) Case "9"  CDGen_SetDirection 120                            ' 逆时针60度(相对于垂直线)  CDGen_FowardDraw -0.7                             ' 反方向绘制0.7个单位  CDGen_SetDirection -60                            ' 逆时针60度  CDGen_FowardDraw -0.7                             ' 反方向绘制0.7个单位  CDGen_SetDirection -60                            ' 顺时针120度  CDGen_FowardDraw -1.5                              ' 绘制1.5个单位  CDGen_SetDirection -60                            ' 顺时针120度  CDGen_FowardDraw -0.7                             ' 反方向绘制0.7个单位  CDGen_SetDirection -60                            ' 顺时针120度  CDGen_FowardDraw -0.7                              ' 绘制0.7个单位  CDGen_SetDirection 120                            ' 顺时针120度  CDGen_FowardDraw 0.7                             ' 反方向绘制0.7个单位  CDGen_SetDirection -60                            ' 顺时针120度  CDGen_FowardDraw 0.5                              ' 绘制0.5个单位  CDGen_CloseToMiddle 2, 50                         ' 将当前画笔位置与第2笔(0开始)的50%处封闭 ' 以下为字母的矢量动作，有兴趣的可以继续 Case "A"  CDGen_SetDirection -(Rnd * 20 + 150)              ' 逆时针150-170度(相对于垂直线)  CDGen_FowardDraw Rnd * 0.2 + 1.1                  ' 绘制1.1-1.3个单位  CDGen_SetDirection Rnd * 20 + 140                 ' 顺时针140-160度  CDGen_FowardDraw Rnd * 0.2 + 1.1                  ' 绘制1.1-1.3个单位  CDGen_MoveToMiddle 0, 30                          ' 移动画笔的位置到第1笔(0开始)的30%处  CDGen_CloseToMiddle 1, 70                         ' 将当前画笔位置与第1笔(0开始)的70%处封闭 Case "B"  CDGen_SetDirection -(Rnd * 20 + 50)               ' 逆时针50-70度(相对于垂直线)  CDGen_FowardDraw Rnd * 0.4 + 0.8                  ' 绘制0.8-1.2个单位  CDGen_SetDirection Rnd * 20 + 110                 ' 顺时针110-130度  CDGen_FowardDraw Rnd * 0.2 + 0.6                  ' 绘制0.6-0.8个单位  CDGen_SetDirection -(Rnd * 20 + 110)              ' 逆时针110-130度  CDGen_FowardDraw Rnd * 0.2 + 0.6                  ' 绘制0.6-0.8个单位  CDGen_SetDirection Rnd * 20 + 110                 ' 顺时针110-130度  CDGen_FowardDraw Rnd * 0.4 + 0.8                  ' 绘制0.8-1.2个单位  CDGen_Close 0                                     ' 封闭当前笔与第1笔(0开始) Case "C"  CDGen_SetDirection -60                            ' 逆时针60度(相对于垂直线)  CDGen_FowardDraw -0.7                             ' 反方向绘制0.7个单位  CDGen_SetDirection -60                            ' 逆时针60度  CDGen_FowardDraw -0.7                             ' 反方向绘制0.7个单位  CDGen_SetDirection 120                            ' 顺时针120度  CDGen_FowardDraw 1.5                              ' 绘制1.5个单位  CDGen_SetDirection 120                            ' 顺时针120度  CDGen_FowardDraw -0.7                             ' 反方向绘制0.7个单位  CDGen_SetDirection 120                            ' 顺时针120度  CDGen_FowardDraw 0.7                              ' 绘制0.7个单位 End Select CDGen_Flush X0, Y0End Sub Sub CDGen_Blur() ' 对产生的位图进行柔化处理 Dim i, j  For j = 1 To nPixelHeight - 2  For i = 1 To nCharCount * nPixelWidth - 2   If Buf(j, i) = 0 Then    If ((Buf(j, i - 1) Or Buf(j + 1, i)) And 1) <> 0 Then     ' 如果当前点是空白点，且上下左右四个点中有一个点是有色点，则该点做柔化处理     Buf(j, i) = 2    End If   End If  Next NextEnd Sub Sub CDGen_NoisyDot() ' 对产生的位图进行噪点处理 Dim i, j, NoisyDot, CurDot  For j = 0 To nPixelHeight - 1  For i = 0 To nCharCount * nPixelWidth - 1   If Buf(j, i) <> 0 Then    NoisyDot = Int(Rnd * Rnd * nMaxSaturation)    Select Case nColorNoisyDotOdds    Case 0     CurDot = nMaxSaturation    Case 1     CurDot = 0    Case Else     CurDot = NoisyDot    End Select    If Rnd < nColorNoisyDotOdds Then Buf(j, i) = CurDot Else Buf(j, i) = nMaxSaturation   Else    NoisyDot = Int(Rnd * nMaxSaturation)    Select Case nBlankNoisyDotOdds    Case 0     CurDot = 0    Case 1     CurDot = nMaxSaturation    Case Else     CurDot = NoisyDot    End Select    If Rnd < nBlankNoisyDotOdds Then Buf(j, i) = CurDot Else Buf(j, i) = 0   End If  Next NextEnd Sub Sub CDGen() ' 生成位图阵列 Dim i, Ch  DigtalStr = "" CDGen_Clear For i = 0 To nCharCount - 1  Ch = Mid(cCharSet, Int(Rnd * Len(cCharSet)) + 1, 1)  DigtalStr = DigtalStr + Ch  CDGen_Char Ch, i * nPixelWidth, 0 Next CDGen_Blur CDGen_NoisyDotEnd Sub Function HSBToRGB(vH, vS, vB) ' 将颜色值由HSB转换为RGB Dim aRGB(3), RGB1st, RGB2nd, RGB3rd Dim nH, nS, nB Dim lH, nF, nP, nQ, nT  vH = (vH Mod 360) If vS > 100 Then  vS = 100 ElseIf vS < 0 Then  vS = 0 End If If vB > 100 Then  vB = 100 ElseIf vB < 0 Then  vB = 0 End If If vS > 0 Then  nH = vH / 60  nS = vS / 100  nB = vB / 100  lH = Int(nH)  nF = nH - lH  nP = nB * (1 - nS)  nQ = nB * (1 - nS * nF)  nT = nB * (1 - nS * (1 - nF))  Select Case lH  Case 0   aRGB(0) = nB * 255   aRGB(1) = nT * 255   aRGB(2) = nP * 255  Case 1   aRGB(0) = nQ * 255   aRGB(1) = nB * 255   aRGB(2) = nP * 255  Case 2   aRGB(0) = nP * 255   aRGB(1) = nB * 255     aRGB(2) = nT * 255  Case 3   aRGB(0) = nP * 255   aRGB(1) = nQ * 255   aRGB(2) = nB * 255  Case 4   aRGB(0) = nT * 255   aRGB(1) = nP * 255   aRGB(2) = nB * 255  Case 5   aRGB(0) = nB * 255   aRGB(1) = nP * 255   aRGB(2) = nQ * 255  End Select    Else  aRGB(0) = (vB * 255) / 100  aRGB(1) = aRGB(0)  aRGB(2) = aRGB(0) End If HSBToRGB = ChrB(Round(aRGB(2), 0)) & ChrB(Round(aRGB(1), 0)) & ChrB(Round(aRGB(0), 0))End Function Sub CreatValidCode(pSN) Dim i, j, CurColorHue  ' 禁止缓存 Response.Expires = -9999 Response.AddHeader "pragma", "no-cache" Response.AddHeader "cache-ctrol", "no-cache" Response.ContentType = "image/bmp"  Call CDGen Session(pSN) = DigtalStr '记录入Session  Dim PicWidth, PicHeight, FileSize, PicDataSize PicWidth = nCharCount * nPixelWidth PicHeight = nPixelHeight PicDataSize = PicWidth * PicHeight * 3 FileSize = PicDataSize + 54  ' 输出BMP文件信息头 Response.BinaryWrite ChrB(66) & ChrB(77) & _  ChrB(FileSize Mod 256) & ChrB((FileSize \ 256) Mod 256) & ChrB((FileSize \ 256 \ 256) Mod 256) & ChrB(FileSize \ 256 \ 256 \ 256) & _  ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & _  ChrB(54) & ChrB(0) & ChrB(0) & ChrB(0)  ' 输出BMP位图信息头 Response.BinaryWrite ChrB(40) & ChrB(0) & ChrB(0) & ChrB(0) & _  ChrB(PicWidth Mod 256) & ChrB((PicWidth \ 256) Mod 256) & ChrB((PicWidth \ 256 \ 256) Mod 256) & ChrB(PicWidth \ 256 \ 256 \ 256) & _  ChrB(PicHeight Mod 256) & ChrB((PicHeight \ 256) Mod 256) & ChrB((PicHeight \ 256 \ 256) Mod 256) & ChrB(PicHeight \ 256 \ 256 \ 256) & _  ChrB(1) & ChrB(0) & _  ChrB(24) & ChrB(0) & _  ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & _  ChrB(PicDataSize Mod 256) & ChrB((PicDataSize \ 256) Mod 256) & ChrB((PicDataSize \ 256 \ 256) Mod 256) & ChrB(PicDataSize \ 256 \ 256 \ 256) & _  ChrB(18) & ChrB(11) & ChrB(0) & ChrB(0) & _  ChrB(18) & ChrB(11) & ChrB(0) & ChrB(0) & _  ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & _  ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0)  ' 逐点输出位图阵列 If nColorHue = -1 Then  CurColorHue = Int(Rnd * 360) ElseIf nColorHue = -2 Then  CurColorHue = 0 Else  CurColorHue = nColorHue End If For j = 0 To nPixelHeight - 1  For i = 0 To Len(DigtalStr) * nPixelWidth - 1   If nColorHue = -2 Then    Response.BinaryWrite HSBToRGB(CurColorHue, 0, 100 - Buf(nPixelHeight - 1 - j, i))   Else    Response.BinaryWrite HSBToRGB(CurColorHue, Buf(nPixelHeight - 1 - j, i), 100)   End If  Next NextEnd Sub%>


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