# CloseCom

int CloseCom (int COMPort);

## Purpose

Closes a COM port.

CloseCom does nothing if the port is not open.

## Parameters

Input
Name | Type | Description
COMPort | integer | A number that indicates the COM port on which to operate. This number is paired with deviceName, which represents the COM port, during the OpenComConfig function call. Default Value: 1—COM1 Valid Range: 1—1,000

## Return Value

Name | Type | Description
result | integer | The result of this function call. This code is a negative value that specifies the type of error that occurred.