You can do a shift-tab when you are setting the text box up yourself from the .uir file to get a four space indentation. Were you hopding to do something like this?
InsertTextBoxLine(pan,PANEL_TEXTBOX,-1,"Hello. \ttab \tab");
Doesn't work too well. Usually there are some pretty easy workarounds but this issue has been here at least since 4.0.
Grant
Grant M. Johnson
Project Engineer
LECO Corporation