You create messages using message maintenance (transaction SE91) and store them in database table T100. The following table shows the structure of database table T100.
| Component | Meaning |
| SPRSL | Single-digit language key. |
| ARBGB | Max. 20-digit message class. The message class assigns messages to a specific area, such as an application area or a packet. |
| MSGNR | Max. 3-digit message number, the range between 900 and 999 is reserved for customers. |
| TEXT | Max. 73-digit message text. You must create an explanatory long text when you maintain the message if the short text itself is not sufficiently explanatory. |
Within short and long texts, you can use placeholders, which can be replaced with the content of data objects using the MESSAGE statement. A maximum of four character-type placeholders are permitted; they are indicated by #&i# in short texts, and by #&Vi&# in long texts, where i = [1, 4]. If #&# itself is to be displayed as part of the text, it must be specified as #&&# in short texts and as "&" in long texts.