COM_TIMEOUT()
 Set Timeout for all operations in 1/10 seconds

 Syntax

     COM_TIMEOUT(<nComPort>[,<nTimeout>])
        --> lOldTimeout

 Arguments

     <nComPort>  Designates the port

     <nTimeout>  Designates operation timeout in tenth (1/10) seconds.

 Returns

     When called only with <nComPort>, the COM_TIMEOUT() returns
     previous value of operation timeout.

 Description

     All read functions may use a timeout mechanism while waiting for
     characters. If this time limit is exceeded the function abort reading.

     The timeout duration is specified by the parameter TenthOfSeconds.
     This value is given as a multiple of a thenth of a second.


 Example

     Turn on the hardware handshake at a port:

     COM_OPEN(2)
     COM_TIMEOUT(6000) // set timeout to 10 minutes