In addition to the standart properties of most of ASP.NET controls, you can also change the following properties of CaptchaControl :

  1. IgnoreCase
    A value indicating whether to ignore the case of the entered text. Default value is "true".
    IgnoreCase
  2. ImageFontFamily
    The value sets the font family of the text inside the image. Default value is "Arial".
    ImageFontFamily
  3. ImageHeight
    The value sets the height of the image. Default value is "70px".
    ImageHeight
  4. ImageWidth
    The value sets the width of the image. Default value is "200px".
    ImageWidth
  5. NumberOfCharacters
    The value sets the number of characters inside the image. Default value is "6".
    NumberOfCharacters
  6. RegenerateImageText
    The text to display on the regenerate image link. Default value is "regenerate".
    RegenerateImageText
  7. Text
    The text to display next to the text box.
    Text
  8. CharactersType
    The type of characters to display in the image. Optional values are "AlphaNumeric", "LettersOnly", "NumbersOnly". Default value is "AlphaNumeric".
    CharactersType
  9. EnableRegenerateImage
    A value indicating whether to enable the user to regenerate images through AJAX requests. If you enable this feature, an aspx page will be created to handle the AJAX requests. Default value is "false".
    EnableRegenerateImage
  10. ImageDeleteTime
    The time in minutes before deleting the image from the server. Default value is "20".
    ImageDeleteTime
  11. ImagesPath
    The directory to save the temporary images in. Default value is "CaptchaImages"
    ImagesPath