Futurebasic/Language/Reference/stop

Description
This statement interrupts program execution and displays a dialog box that shows the line number where the  statement appeared, and gives the user the option of continuing or stopping the program. If the optional string parameter is used, it will be displayed as a message in the alert. If no string parameter is used, FB displays the name of the file in which the  statement was used.

"Image was here"

If the user clicks the "Stop" button, FB calls your stop-event handling routine (if you've designated one using the  statement), and then your program ends. If the user clicks the "Continue" button, execution continues at the next statement following the  statement.

is mainly useful as a debugging tool. It's not recommended for use in the "production" version of your program.

FB Lite behavior: When you use the "FB Lite" runtime, the  statement does not display a dialog, but instead prints a message in the Text Window indicating the line number where the  occurred. At that point, the program ends; the user does not have the option to continue.