C#

public delegate void updatevalores(string dato);<br />
private void actualizarv(string datos) {<br />
            if (this.InvokeRequired)<br />
            {<br />
                this.Invoke(new updatevalores(actualizarv),new object[]{dato});<br />
                return;<br />
            }<br />
            listBox1.Items.Add(dato.ToString());<br />
}

typedef struct<br />
{<br />
	unsigned long ProtocolID;<br />
	unsigned long RxStatus;<br />
	unsigned long TxFlags;<br />
	unsigned long Timestamp;<br />
	unsigned long DataSize;<br />
	unsigned long ExtraDataIndex;<br />
	unsigned char Data[4128];<br />
} PASSTHRU_MSG;<br />
<br />
long PassThruStartMsgFilter(unsigned long ChannelID, unsigned long FilterType, PASSTHRU_MSG *pMaskMsg, PASSTHRU_MSG *pPatternMsg, PASSTHRU_MSG *pFlowControlMsg, unsigned long *pMsgID); <br />
<br />
<br />

static System.Windows.Forms.Timer tmr = new System.Windows.Forms.Timer(); // Your timer

int iCurrentSeconds = 0;

private void NotificationConfig_Load(object sender, EventArgs e)
{
   tmr.Tick += new EventHandler(TimerEventProcessor); // Timer event handler
   tmr.Interval = 1000; // 1 second       
   tmr.Start(); // Start the timer
}

private void TimerEventProcessor(object obj, EventArgs e)
{
   iCurrentSeconds++; // Adds one second to the second counter for every interval
   Console.Writeline("Timer has been running for {0} seconds!", iCurrentSeconds); // writes how many seconds the timer has ran to console
}

Pete O`Hanlon wrote:

Why do you actually need to do this? It seems a lot more complicated than getting the difference between two datetime objects. It's certainly a lot more code - which while not always a bad thing, certainly doesn't adhere to the KISS principal.

Justin Perez wrote:

I assumed that he was wanting to preform an operation multiple times within the timer, until a certain condition had been met. The most simple way to do that to me seemed to be a timer preforming the operations, and when the condition was met, do a timer.Stop().

Justin Perez wrote:

Maybe I am missing something though, is it as efficent to do the above with a TimeSpan object?

Pete O`Hanlon wrote:

There's a bit of a gotcha with a TimeSpan in that you can't go over a day. Now I know it's unlikely, but it is vaguely possible that he started the process off and then left to go on holiday for a couple of weeks. When he gets back, if he's using the DateTime it will work - a TimeSpan and it'll crash.