动网论坛验证码改进 加法验证码(ASPJpeg版)

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'=============================================================================
'动网论坛加法验证码（ASPJpeg版）
'作者cuixiping
'博客(CSDN)http://blog.csdn./cuixiping/
'博客(博客园)http://.blogs./cuixiping/
'日期2008年11月
'生成100x20的jpeg图片验证码，内容类似“25+64等于？”
'需要网站空间支持ASPJpeg组件(Persits.Jpeg)。
'如果服务器没有“楷体_GB2312”字体，请修改为其他字体并调整字符位置。
'使用方法将该代码替换动网论坛的Dv_GetCode.asp文件中的内容，文件首尾不要留空行。
'=============================================================================

Const FontColor = &H000000 ' 字体颜色
Const BgColor = &HFFCCFF ' 背景颜色

Call CreatValidCode("GetCode")

Sub CreatValidCode(pSN)
Dim x, Jpeg
Randomize
x = Array(1+Int(Rnd()9), Int(Rnd()10), 1+Int(Rnd()9), Int(Rnd()10), 0, 0, "+")
x(4) = x(0)10 + x(1)
x(5) = x(2)10 + x(3)
'Session(pSN) = CStr(Eval(x(4) & x(6) & x(5)))
Session(pSN) = CStr(x(4) + x(5))

Set Jpeg = Server.CreateObject("Persits.Jpeg")
Jpeg.New 100,20,BgColor
Jpeg.Quality=100
With Jpeg.Canvas
.Font.Bold = True
.Font.Size = 16
.Font.Rotation = 0
.Font.Family = "楷体_GB2312"
.Font.Color = FontColor
.PrintText 4, 3, CStr(x(0))
.PrintText 14, 3, CStr(x(1))
.PrintText 26, 3, x(6)
.PrintText 38, 3, CStr(x(2))
.PrintText 48, 3, CStr(x(3))
.Font.Rotation = 15
.PrintText 55, 3, "等"
.PrintText 70, 3, "于"
.PrintText 85, 3, "？"
End With
'禁止缓存
Response.ContentType = "image/jpeg"
Response.Expires = -9999
Response.AddHeader "pragma", "no-cache"
Response.AddHeader "cache-ctrol", "no-cache"
Response.AddHeader "Content-Disposition","inline; filename=vcode.jpg"
Jpeg.SendBinary
Jpeg.Close
Set Jpeg = Nothing
End Sub
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