Query the DosError() state

Found in comp.os.os2.programmer.misc:

- SEG: >>The reason is that there is no way to undo DosError, since there is >> no way to query what is the state of error-reporting was when your >> function is called. Umm, not well-documented, but a little poking revealed this (won't work in Warp 3 or Warp 4 prior to FP13): APIRET APIENTRY DosSysCtl(ULONG func, ULONG p); ULONG SavedDosError = 1; DosSysCtl((ULONG)27, (ULONG)&SavedDosError); DosError(0L);   //FERR_DISABLEHARDERROR ...        DosError(SavedDosError); Hope this helps.

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