The jmsgbox utility can be used to display a message box on Windows platforms.
It can only be used with a console process and the buttons are not configurable.
COMMAND SYNTAX
jmsgbox text
EXAMPLE
PERFORM "jmsgbox Test Box" SETTING Result
IF Result<1,1>=0 THEN CRT "Ok was clicked"
IF Result<1,1>=1 THEN CRT "Cancel was clicked"