Millisecond Forums

You cannot send signals or create keypress events via logic in /ontrialbegin or /ontrialend.

Your description suggests that you want to create a script that "simulates" events that have not actually happened. I have trouble seeing why you would want to do that. Please explain what exactly you want to achieve and why. Then, perhaps, I can make a concrete suggestion.

Thanks for your comment.

I would like to create the signal, because I want to record the signal by another soft ware.

For example, eye mark recorder soft ware can record the Key press event.
If I create key event signal when trials begin, It become easy that I synchronize Inquisit's data and eye mark recorder's data.

Hmm, well, it's not possible. The way, however, to insert markers into eyetracking data is to set up <port> elements and display them via /stimulustimes, /stimulusframes or /responsemessage attributes. See e.g. https://www.millisecond.com/forums/FindPost16016.aspx for a simple example.