VALUE
Entry fields take a numeric or alphanumeric value.
Note that conversion between the alphanumeric and numeric forms occurs
automatically if you specify a numeric value. This allows you to use numeric data items
with entry fields. When you use a numeric data item as an entry field's value,
the runtime prevents the user from entering non-numeric data.
Note also: Under Windows, you may encounter a peculiar behavior that looks like a bug
but is actually a limitation of the Windows systems. If your entry field is
formatted for numeric value and you paste non-numeric data into it from the
clipboard, the runtime has no way of checking and verifying that the data is of a
correct format, and as a result the entry field will be allowed to contain
invalid data.