# KeyPressEventIsTrailByte

int KeyPressEventIsTrailByte (int eventData2);

## Purpose

Call this function when you receive an EVENT_KEYPRESS in a panel or control callback to determine if the callback's eventData1 parameter contains the second byte of a two-byte character. If the callback's eventData1 parameter contains a trail byte, you can call GetKeyPressEventCharacter to get both bytes of the character.

## Parameters

Input
Name | Type | Description
eventData2 | int | The panel or control callback's eventData2 parameter.

## Return Value

Name | Type | Description
isTrailByte | int | > 0 if the EVENT_KEYPRESS event is for a trail byte of a two-byte character. 0 if the EVENT_KEYPRESS event is not for a trail byte of a two-byte character. Negative values indicate that an error occurred.