COMM_Open

Description

Opens a serial port to begin communications.

Syntax

COMM_Open(sComPort, hComm)

Returns

None

Parameters

Name	Type	Optional	Meaning
sCommPort	String	No	Identifies the serial port number, for example, "COM1", "COM4", etc.
hComm	Number	No	A number containing a free file number, typically provided by the COMM_FreeFile function.

Remarks

If the port was not opened successfully, the ERR will contain the error code.

Before actual communications through the port can commence, you must configure the communication parameters by using a COMM_Set statement for each parameter.

Restrictions

When opening ports above "COM9", Windows requires the port name to be specified using the following syntax:

COMM_Open("\\.\COM15", hComm)