Rockwell-automation 2711P Software Development Kit User Manual Instrukcja Użytkownika Pobierz pdf (Strona 77)

Publication 2711P-UM005A-EN-P - March 2007

PanelView Plus CE-Specific Extensions to the WinCE API 77

Get First Event

This function reads the first or oldest Event from the Event log.

DWORD GetFirstEvent (EVENT*pEvent);

Parameters:

pEvent

A pointer to an EVENT structure.

Return Values:

Remarks:

This function is typically used to establish the starting position for an

iteration loop that traverses the Event Long in the oldest to newest

direction; i.e. first to last.

Use GetNextEvent() in a iteration loop with direction set to AFTER.

The time/date stamps will be ascending.

Portability:

This function is specific to the PanelView Plus CE.

Requirements:

GetFirstEvent - Return Codes

Value Description

EVENT_SUCCESS The first or oldest Event was read successfully and

returned to the structure at pEvent.

EVENT_ FILE_EMPTY No Event was returned The Event log is empty.

EVENT_FAIL No Event was returned. The operation failed.

Runs On Version Defined In Link To

PanelView Plus CE All EventLog.h EventLog.lib

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Rockwell-automation 2711P Software Development Kit User Manual Instrukcja Użytkownika Strona 77