Hello,
please excuse my bad English. I hope you will understand anyway.

I have a problem with the MSGBOX action. When i insert text and click the ok button, the error message "Error in expression" appears and nothing is changed.

I downloaded the Sample Quizz course from this website and tried to explore, how the msgbox works. But if i want to change the inserted text of the msgbox the same problem appears. What iґm doing wrong?

ah, i solved the problem :) You have to use quotation marks