Padding a string with hexadecimal values

[huskers]

Can any one tell me how I can pad a string with hexadecimal values in Tcl. I am new to this area. A string str1 should look like this:
[hexadecimal 2]str1[hexadecimal 3]. This is done just to make sure that str1 can contain any value and when i am reading it i will know that it starts with hexadecimal 4 and ends with hexadecimal 3.

Thanks in advance

 

[AviaTraining]

When you say "hexadecimal 3", do you mean a character whose ASCII code is 0x03? If so, then it's simply a matter of using the [tt]\x[/tt] backslash substitution:

set str1 "Test"
set str2 "\x3$str1\x4"

- Ken Jones, President, ken@avia-training.com
Avia Training and Consulting,

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[huskers]

Yup that was what i was looking for....Thanks