The members of the class queue form a single message as it appears when residing on a thread's message queue. The table below documents the interpretation placed on the members.
| Member | Interpretation |
| window | The handle of the window for which the message is destined. |
| identity | The identity of the message. |
| parameter1 | The first parameter of the message. |
| parameter2 | The second parameter of the message. |
| time | The time (in milliseconds) at which the message was placed on the queue. |
| position | The position of the cursor (in screen coordinates) for the message. |