Raising an error in application process?

Question

How can I raise an error in an application process?
the application process in on-load before header
I want to check something at this event
when not ok I want to show the process error message that can be defined at the aplication process.
The help text of this process error message says:
Enter the text for an error message that can be displayed if the process fails.
Can I programmatically raise that error?
kind regards Erik

Answer 1

succes message that I want to show, but the process error message.AFAIK, the same variable works for success or error. So you if you assign it a value it would be shown as the process message.
If required, you can style it using HTML to identify between success and error cases
<span style="color:GREEN">Successs Message</span>or
<span style="color:RED">ErrorMessage</span>
When I raise the error in the exception part I do get the process error message, but I also get User-Defined-ExceptionThen don't raise any exception, just assign the variable in the exception handler alone in the PLSQL Block.