All Event Handling Is Disabled in an ON ERROR GOTO Handler

• Microsoft Visual Basic Standard and Professional Editions for MS-DOS, version 1.0
• Microsoft QuickBASIC for MS-DOS, versions 2.0, 2.01, 3.0, 4.0, 4.0b, 4.5
• Microsoft BASIC Compiler for MS-DOS and MS OS/2, versions 6.0, 6.0b
• Microsoft Basic Professional Development System (PDS) for MS-DOS and MS OS/2, version 7.0

SUMMARY

All event handling is suspended in an ON ERROR GOTO handler. The following types of events are suspended during an error trapping routine:

1. Key trapping (ON KEY(n) GOSUB)



2. Timer (ON TIMER(n) GOSUB)



3. Communications (ON COM(n) GOSUB)



4. Light Pen (ON PEN GOSUB)



5. Joy Stick (ON STICK GOSUB)



6. User-defined event (ON UEVENT GOSUB)

MORE INFORMATION

The following code sample demonstrates this type of behavior:

   ON ERROR GOTO trap
   ON KEY(1) GOSUB keytrap
   KEY (1) ON
   ERROR 5    ' Forces an error 5.
   END 

trap:

     PRINT "In the error trap, enter F1"
     while inkey$=""
     wend
     RESUME NEXT 

keytrap:

     Print "A key as pressed"
     return 

Additional query words: VBmsdos QuickBas BasicCom

Keywords :
Version : MS-DOS:1.0,2.0,2.01,3.0,4.0,4.0b,4.5; :6.0,6.0b,7.0
Platform : MS-DOS
Issue type :