| Message | When Sent |
| STARTUP | After the mbedlet file has been parsed and all preload objects have been loaded. |
| SHUTDOWN | When an mbedlet instance is terminated. |
| ACTIVATE | At startup and when reactivating an mbedlet that was cached and left in memory. |
| DEACTIVATE | At shutdown and when caching an mbedlet in memory. |
| MOUSEDOWN | When the user presses a mouse in a player. |
| MOUSEUP | When the user releases the mouse. This message is sent to the player which received the mousedown if the mouse it still over that player. |
| MOUSERELEASE | When the user releases the mouse. This message is sent to the player which received the mousedown no matter what player the mouse is over when it is released. |
| MOUSEENTER | When the mouse moves onto a player. |
| MOUSELEAVE | When the mouse leaves a player. |
| COMPLETELOAD | When a player's data is completely loaded. This message is sent to the player whose data was loaded. |
| TOGGLEON | When the state of a button is set to on. |
| TOGGLEOFF | When the state of a button is set to off. |
| GETFOCUS | When the text field becomes the focus. |
| LOSEFOCUS | When the text field loses the focus. |
| KEYPRESS | When a character is entered into the text field. |
| DROPPEDON | When the user drops a player onto another player. This message is sent to the player onto which the other player was dropped. |