# GetOutQLen

int GetOutQLen (int COMPort);

## Purpose

Returns the number of characters in the output queue of the specified port.

You can use GetOutQLen to ensure the output queue empties before you close the port. This function has no effect on the output queue.

GetOutQLen returns an error if you have not opened the port of if you pass an invalid value for COMPort.

## 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
len | integer | The current length of the output queue.