Texas Instruments TI-89 Developer's Manual page 6

iv
8.7. VAR-LINK........................................................................................................... 76
9. Application Control Flow.........................................................................77
9.1. Event-Driven Architecture .................................................................................. 77
9.2. Event Structure Layout....................................................................................... 78
9.3. Commands......................................................................................................... 79
9.4. Starting and Stopping an Application ................................................................. 84
9.5. Keyboard Events................................................................................................ 85
9.6. Menu Processing ............................................................................................... 85
9.6.1. Static Menus......................................................................................................... 86
9.6.2. Dynamic Menus.................................................................................................... 87
9.7. Paint Events ....................................................................................................... 88
9.8. Background Events ............................................................................................ 88
9.9. Default Event Handler ........................................................................................ 88
9.9.1. CM_KEY_PRESS................................................................................................. 88
9.9.2. CM_PASTE_STRING........................................................................................... 91
9.9.3. CM_PASTE_HANDLE.......................................................................................... 92
9.9.4. CM_STO............................................................................................................... 92
9.9.5. CM_RCL............................................................................................................... 92
9.9.6. CM_DEACTIVATE ............................................................................................... 92
9.9.7. CM_ACTIVATE .................................................................................................... 92
9.10. Installing, Moving, and Deleting an Application................................................ 92
10. Error Handling ......................................................................................95
10.1. Throwing an Error .......................................................................................... 95
10.2. Delayed Error Messages ............................................................................... 95
10.3. Throwing Your Own Errors ............................................................................ 96
10.4. Catching Errors .............................................................................................. 97
10.5. Cleaning Up ................................................................................................... 97
10.6. Caveats.......................................................................................................... 98
10.6.1. Jumping Out of TRY Blocks .......................................................................... 98
10.6.2. Referencing Auto Variables in ONERR/FINALLY Blocks.............................. 99
10.6.3. Where Not to Throw Errors ........................................................................... 99
TI-89 / TI-92 Plus Developer Guide Not for Distribution
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Beta Version January 26, 2001