Casio DT-X8 Series Bedienungsanleitung PDF herunterladen (Seite 169)

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3.122 SysWaitForEvent

This function waits for an event that occurs in driver, etc. The function does not return until when an

event occurs or when the preset period of the timeout elapses. To call the function, use another

thread, not main thread used by application. See also note below.

To forcibly terminate the wait state by the function, call SysTerminateWaitEvent function from

the main thread of the application. After forcibly terminating the wait state, the function will return

one of the return values. But, it does not indicate whether the wait state has been reset for free. It is

necessary to check the status of the event.

The function is good for cases that if you wish to acknowledge completion of an input/output via

event notification. For example, if you wish to set up "Notification via Event" with

OBRSetScanningNotification function of the Laser Scanner Library as the notification method

for the completion of scanning bar code.

Calling Sequences

[Visual Basic]

Public Shared Function SysWaitForEvent( _

ByVal EventHandle As IntPtr, _

ByVal EventName As string, _

ByVal TimeOut As Int32 _

) As Int32

[C#]

public static Int32 SysWaitForEvent(

IntPtr EventHandle,

string EventName,

Int32 TimeOut

)

Parameters

EventHandle

This parameter specifies the handle of an event that the function waits for. Specify

"IntPtr.Zero" in this parameter if the specification is carried out in EventName parameter.

EventName

This parameter specifies the name of event that the function waits for. The parameter is

ignored if other value not "IntPte.Zero" is specified in the EventHandle parameter.

TimeOut

This parameter specifies a time period of the timeout in millisecond that the function waits

for an event to occur. Specify "Def.INFINITE (-1)" in this parameter if the function

infinitely waits for an event.

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Casio DT-X8 Series Bedienungsanleitung Seite 169