By default, the AllowPrefixes property is "", which indicates that the control supports no prefixes. A line can have a prefix delimited by the AllowPrefixes property, and can have a comment delimited by the AllowComments property. The prefix of the line and its comment are never evaluated. In conclusion, the expression of the line starts after AllowPrefixes property, and ends before AllowComments property. The FormatInvalid property specifies the HTML format to show invalid lines. The AddWildFormat method formats the line based on the giving wild characters expression.

The list of supported built-in HTML tags is:

• <b>bold</b>
• <i>italic</i>
• <s>strikeout</s>
• <u>underline</u>
• <fgcolor=RRGGBB>fgcolor</fgcolor>
• <bgcolor=RRGGBB>bgcolor</bgcolor>
• <font face;size>text </font> displays portions of text with a different font and/or different size. For instance, the <font Tahoma;12>bit</font> draws the bit text using the Tahoma font, on size 12 pt. If the name of the font is missing, and instead size is present, the current font is used with a different size. For instance, <font ;12>bit</font> displays the bit text using the current font, but with a different size.

For instance, if:

• the AllowComments property is "<fgcolor=008080>//</fgcolor>", it specifies that the comments starts after // expression, and show in green.
• the AllowPrefixes property is "<b><fgcolor=0000FF>:</fgcolor></b>", it specifies that prefix of the line starts before : character, and it shows in bold and blue.

The following screen shot shows lines with/without comments and prefixes:

The

• the black portion of each line is the expression being evaluated
• the gray portion of each line indicates the result of evaluation the line
• the blue portion of each line indicates its prefix, and it is not evaluated
• the green portion of each line is its comment and it is not evaluated
• if present, the red line indicates an invalid line

In case, the AllowComments property is empty, we get the following:

so only lines with or without a prefix are evaluated:

In case, the AllowPrefixes property is empty, we get the following:

so only lines with or without a comment are evaluated:

or if both are empty we get the following:

so only lines without a prefix and comment are evaluated: