Ctrl-C does not work, but with right mouse popup, you can choose
copy as text, or bitmap, or print it.
But, yout question is real, because standard Windows message box can be copied as text.
ORA-06550: line 18, column 5:
PLS-00103: Encountered the symbol "I" when expecting one of the following:
( begin case declare end exception exit for goto if loop mod
null pragma raise return select update while with
<an identifier> <a double-quoted delimited-identifier>
<a bind variable> << continue close current delete fetch lock
insert open rollback savepoint set sql execute commit forall
merge pipe purge json_exists json_value json_query
json_object json_array
The symbol "select" was substituted for "I" to cont
ORA-06550: line 18, column 33:
PLS-00103: Encountered the symbol ")" when expecting one of the following:
, * & - + / at mod remainder rem <an identifier>
<a double-quoted delimited-identifier> <an exponent (**)> as
from into || multiset bulk
ORA-06550: line 40, column 0:
PLS-00103: Encountered the symbol "end-of-file" when expecting one of the following:
end not pragma final instantiable persistable order
overriding static member constructor map