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This is part of Family API which allow to create dual-os version of program runs under OS/2 and DOS
Note: This is legacy API call. It is recommended to use 32-bit equivalent
This call allows an OS/2 process to receive hard error notification without generating a hard error signal.
- Flags (USHORT) - input : Bit field, defined in the following example (the unused high-order bits are reserved and must be set to zero).
^ Bit ^ Description ^
|15-2||Reserved, set to zero|
|1||0 = Enable exception popups. 1 = Disable exception popups|
|0||0 = Disable hard error popups (fail requests). 1 = Enable hard error popups|
rc (USHORT) - return
Return code descriptions are:
- 0 NO_ERROR
- 87 ERROR_INVALID_PARAMETER
DosError allows an OS/2 process to disable user notification if a program (or untrapped numeric processor) exception occurs. If end user notification is disabled, and if one of these exceptions occurs, the process is terminated.
Hard errors generated under a process that has issued a DosError call are failed, and the appropriate error code is returned. The default situation is both hard error pop-ups and exception pop-ups are enabled, if DosError is not issued.
Family API Considerations
Some options operate differently in the DOS mode than in the OS/2 mode. Therefore, the following restriction applies to DosError when coding for the DOS mode:
For Flag, a value of 0000 causes all subsequent INT 24s to be failed until a subsequent call with a value of 1 is issued.
Note: Since INT 24 is not issued in DOS mode, this call has no effect when running in DOS mode.
#define INCL_DOSMISC USHORT rc = DosError(Flag); USHORT Flags; /* Action flags */ USHORT rc; /* return code */
EXTRN DosError:FAR INCL_DOSMISC EQU 1 PUSH WORD Flags ;Action flags CALL DosError Returns WORD
This example disables hard error popups and exception popups, then re-enables them.
#define INCL_DOSQUEUES #define ENABLE_EXCEPTION 0 #define DISABLE_EXCEPTION 2 #define ENABLE_HARDERROR 1 #define DISABLE_HARDERROR 0 #define DISABLE_ERRORPOPUPS DISABLE_EXCEPTION | DISABLE_HARDERROR #define ENABLE_ERRORPOPUPS ENABLE_EXCEPTION | ENABLE_HARDERROR USHORT rc; rc = DosError(DISABLE_ERRORPOPUPS); /* Action flag */ rc = DosError(ENABLE_ERRORPOPUPS); /* Action flag */
Text based on http://www.edm2.com/index.php/DosError_(FAPI)