IoRaiseInformationalHardError function

Description

The IoRaiseInformationalHardError routine sends a dialog box to the user, warning about a device I/O error that indicates why a user I/O request failed.

Parameters

ErrorStatus [in]

The error status code (IO_ERR_XXX).

String [in, optional]

A pointer to a Unicode string, which provides additional information about the error. Some NT status codes require a string parameter, such as a file or directory name. If the specified ErrorStatus value does not require a string parameter, set String to NULL.

Thread [in, optional]

A pointer to the thread whose IRP was failed due to the error specified by the ErrorStatus parameter.

Return value

IoRaiseInformationalHardError returns TRUE if the dialog box was successfully queued. This routine returns FALSE if dialog boxes are disabled for Thread, a pool allocation failed, too many dialog boxes are already queued, or an equivalent dialog box is already pending a user response (such as waiting for the user to press RETURN).

Remarks

IoRaiseInformationalHardError takes a system-defined NT error value as a parameter. Driver writers can use the event log APIs to communicate driver-defined event strings to the user.

IoRaiseInformationalHardError behaves as follows:

• If the caller-supplied ErrorStatus value is not defined in the Ntstatus.h header file, the dialog box always shows the text "Unknown Hard Error", regardless of the String parameter value.
• If the caller-supplied ErrorStatus value is defined in the Ntstatus.h header file, the dialog box shows the text in the corresponding MessageText string in Ntstatus.h, regardless of the String parameter value.
• If the Thread parameter specifies a thread that is running in the context of an application, the text shown in the dialog box is "ApplicationName.exe - System Error".
• If the Thread parameter is NULL or if it specifies a thread that is running in an arbitrary system context, the text shown in the dialog box is "System Process - System Error". Additionally, if the ErrorStatus value is defined in Ntstatus.h, the corresponding MessageText string is written to the event log.

If a previous call to the IoSetThreadHardErrorMode routine disabled hard errors for the specified thread, IoRaiseInformationalHardError returns FALSE.

Starting with Windows Vista, if the routine is called from a thread in session 0 (that is, from any system thread), no dialog box appears when the routine succeeds and returns TRUE.

See also

IoSetHardErrorOrVerifyDevice

IoSetThreadHardErrorMode

PsGetCurrentThread