First, your statement is invalid; RESULT is numeric, %Trim doesn’t work with numeric. You can:
1 Make the field char, then make the results of %trim numeric again:
C eval RESULT = %int(%TRIM(%char(RESULT)))
In which case RESULT = 00011
You could return it to a character field instead of the original numeric:
C eval Alpha5 = %TRIM(%char(RESULT))
In which case ALPHA5 = ’11 ‘
any number of other options. But the point is your original statement won’t work.