Options you can have on the string:

e = text that will be printed on the image. for email addresses you shouldn't of course put the email in correct format. Instead of dot you can use any of the three characters listed below:
*
^
~

and instead of @ character you can use any of the three character sets listed below:
**
^^
~~

Example:
Code: "image.aspx?e=my^email~~domain*com"
Image:
Note: all the example image tags has a style added to them to align the image with the text little better: <img src="image.aspx?e=my^email~~domain*com" style="vertical-align:middle;" />


f = font to be used to print the text. You should be able to use any standard windows fonts.

Example:
Code: "image.aspx?e=my^email~~domain*com&f=verdana"
Image:


fk = font size.

Example:
Code: "image.aspx?e=my^email~~domain*com&f=verdana&fk=14"
Image:


ft = font style. Options you have are:
0 = normal
1 = bold
2 = italic
3 = italic and bold
4 = underline
5 = underline & bold
6 = underline & italic
7 = underline & bold & italic
8 = Strikethrough


Example:
Code: "image.aspx?e=my^email~~domain*com&f=verdana&fk=14&ft=2"
Image:


fv or fvrgb = font color. You can either use the fv to name your color like Blue or use the fvrgb to specify the color by RGB color model. If you will specify both Text and RGB color for the text, RGB will be used.

Example for fv:
Code: "image.aspx?e=my^email~~domain*com&f=verdana&fk=14&ft=2&fv=blue"
Image:

Example for fvrgb:
Code: "image.aspx?e=my^email~~domain*com&f=verdana&fk=14&ft=2&fvrgb=122,122,190"
Image:


tv or tvrgb = background color. You can use either the tv to name your picture background color like Green or use the tvrgb to specify the background color by RGB color model. If you will specify both Text and RGB color for the image, RGB will be used. If you don't specify any color, background will be made transparent.


Example for tv:
Code: "image.aspx?e=my^email~~domain*com&f=verdana&fk=14&ft=2&fv=blue&tv=green"
Image:

Example for fvrgb:
Code: "image.aspx?e=my^email~~domain*com&f=verdana&fk=14&ft=2&fvrgb=122,122,190&tvrgb=10,10,10"
Image:


tn = background noise. If you want to add some 'noise' to the image background, you can use this option. If you will use this option, the tv & tvrgb option will be ignored. You have 4 options for this, below are examples for each of them:

Example for tn=1:
Code: "image.aspx?e=my^email~~domain*com&f=verdana&fk=12&ft=2&fv=blue&tn=1"
Image:

Example for tn=2:
Code: "image.aspx?e=my^email~~domain*com&f=verdana&fk=12&ft=2&fv=blue&tn=2"
Image:

Example for tn=3:
Code: "image.aspx?e=my^email~~domain*com&f=verdana&fk=12&ft=2&fv=blue&tn=3"
Image:

Example for tn=4:
Code: "image.aspx?e=my^email~~domain*com&f=verdana&fk=12&ft=2&fv=blue&tn=4"
Image: