Hi glen,
I had the same problem than you once, and there is no solution; not with a textbox at least.
The textbox does not accept the formatting character;
it does not accept escape sequence either ("\033p50l").
The only work around I found was to use a listbox, being carreful that my text could be displayed on a single line every time...
To make the "\t" statement, do:
sprintf (tmpStr, "\033p(number of pixel you want)l%s", cString);
InsertListItem(..., tmpStr);
Hope this help, flo.