DosSysCtl: Difference between revisions
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==Syntax== | ==Syntax== | ||
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==Remarks== | ==Remarks== | ||
It is not declared in the headers but it is in the standard import libraries (DOSCALLS.876). | It is not declared in the headers but it is in the standard import libraries (DOSCALLS.876). The DosSysCtl function may be used for detecting whether we're being debugged or not. | ||
Check also [[Query the DosError() state]]. | Check also [[Query the DosError() state]]. | ||
==Sample Code== | ==Sample Code== | ||
<code> | |||
APIRET APIENTRY DosSysCtl(ULONG func, ULONG p); | APIRET APIENTRY DosSysCtl(ULONG func, ULONG p); | ||
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DosSysCtl((ULONG)27, (ULONG)&SavedDosError); | DosSysCtl((ULONG)27, (ULONG)&SavedDosError); | ||
DosError(0L); //FERR_DISABLEHARDERROR | DosError(0L); //FERR_DISABLEHARDERROR | ||
... | |||
DosError(SavedDosError); | DosError(SavedDosError); | ||
</code> | |||
[[Category:Dos]] | [[Category:Dos]] | ||
Latest revision as of 14:01, 30 March 2019
Syntax
DosSysCtl(ULONG func, ULONG p);
Remarks
It is not declared in the headers but it is in the standard import libraries (DOSCALLS.876). The DosSysCtl function may be used for detecting whether we're being debugged or not.
Check also Query the DosError() state.
Sample Code
APIRET APIENTRY DosSysCtl(ULONG func, ULONG p);
ULONG SavedDosError = 1;
DosSysCtl((ULONG)27, (ULONG)&SavedDosError);
DosError(0L); //FERR_DISABLEHARDERROR
...
DosError(SavedDosError);