Need help for C# count down timer with rs232 protocol

[benze]

I have an application using Visual C# that interface to my microcontroller. I have only used buttons to write buttons in the RS232. I want to make a count down timer
so that every time my count down timer reaches zero it will send/write a stop to the microcontroller via rs232 protocol. Any one has an idea to this one? any sample code
will help a lot?

tnx,

 

[btbass]

Cant you just use the Timer component?
Drop one on the form and set it's interval property to whatever time you need.
Use the timer interrupt to count down and send the message.