Delphi 模拟网站验证码
function TfrmLabelPages.PwdImg(img: Timage): string;var I,j,k: Integer; vPoint: TPoint; vLeft: Integer; arrStr:array [1..36]of string ; strResult: string;begin strResult := ''; arrStr[1] := '0'; arrStr[2]:='1'; arrStr[3]:='2'; arrStr[4]:='3'; arrStr[5] := '4'; arrStr[6]:='5'; arrStr[7]:='6'; arrStr[8]:='7'; arrStr[9] := '8'; arrStr[10]:='9'; arrStr[11]:='A'; arrStr[12]:='B'; arrStr[13] := 'C'; arrStr[14]:='D'; arrStr[15]:='E'; arrStr[16]:='F'; arrStr[17] := 'G'; arrStr[18]:='H'; arrStr[19]:='I'; arrStr[20]:='J'; arrStr[21] := 'K'; arrStr[22]:='L'; arrStr[23]:='M'; arrStr[24]:='N'; arrStr[25] := 'O'; arrStr[26]:='P'; arrStr[27]:='Q'; arrStr[28]:='R'; arrStr[29] := 'S'; arrStr[30]:='T'; arrStr[31]:='U'; arrStr[32]:='V'; arrStr[33] := 'W'; arrStr[34]:='X'; arrStr[35]:='Y'; arrStr[36]:='Z'; For j:=1 to 4 do begin Randomize; k := strtoint(Format('%.1d',[Random(36)])); strResult := strResult + trim(arrStr[k]) end; vLeft := 10; img.picture := nil; for I := 1 to Length(strResult) do begin with Img do begin Canvas.Font.Size := Random(10)+ 9; Canvas.Font.Color := RGB(Random(256) and $C0, Random(256) and $C0, Random(256) and $C0); if Random(2)=1 then Canvas.Font.Style := [fsBold] else Canvas.Font.Style := []; begin Canvas.Font.Name := Screen.Fonts[10]; vPoint.X := Random(4)+ vLeft; vPoint.Y := Random(5); Canvas.TextOut(vPoint.X, vPoint.Y,strResult[I]); vLeft := vPoint.X + Canvas.TextWidth(strResult[I]); end; end; end;end;