Sample source and CAPTCHA code in ASPX vb.net

ASPX vb.net source code and CAPTCHA example

Today, in this post, we have prepared for you, dear users of the website, a magic file of a sample source and CAPTCHA code in ASPX vb.net ready for download. with which you can create CAPTCHA graphics that you can use on websites to help authenticate users.

What is CAPTCHA?

CAPTCHA stands for C Completely A utomated P ublic T uring t est to tell part to C computers and Humans. This method uses images of words or numbers that, in theory, are distorted and jumbled enough that an optical character recognition program can't read them, but a human should be able to do so easily.

Main features:

• Six characters (using numbers 0-9, uppercase AZ and lowercase az).
• It is case sensitive
• It has dynamic font color and position.
• It helps (clearly visible in the message box).

Let's look at some of the details of this procedure.

The HatchBrush object is used to draw the background of the grid. The randomly generated numeric characters are drawn one graphic character at a time and randomly placed along the vertical axis and slightly off the horizontal axis. The FillEllipse method of the Graphics object is used to create noise at 50 different random points in the graphic.

Dear user, you are offered a download