This is documentation for Mathematica 8, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.1)

FormBox

FormBox
is a low-level box construct which displays as boxes but specifies that rules associated with form should be used to interpret boxes on input.
Create a cell with TraditionalForm style settings applied:
Create a cell with StandardForm style settings applied:
FormBox affects interpretation of its contents:
TraditionalForm formatting uses FormBox:
The formatted result looks like this:
Create a cell with TraditionalForm style settings applied:
In[1]:=
Click for copyable input
Out[1]=
 
Create a cell with StandardForm style settings applied:
In[1]:=
Click for copyable input
Out[1]=
 
FormBox affects interpretation of its contents:
In[1]:=
Click for copyable input
Out[1]=
In[2]:=
Click for copyable input
Out[2]=
 
TraditionalForm formatting uses FormBox:
In[1]:=
Click for copyable input
Out[1]//FullForm=
The formatted result looks like this:
In[2]:=
Click for copyable input
Out[2]//TraditionalForm=
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