>Well now, ain't that curious. I just went back and tried this over again, and I get the same results. I wonder why it works OK for you and not for me. Hmmmm. I have no guesses ...
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>>>[3] "View Definition" only finds PROCs that are defined with a PROCEDURE or FUNCTION statement. Thus, a PRG named 'MyProgram.PRG' which does not begin with a PROCEDURE statement will not be found. (I usually only add PROC of FUNC to the first line of PRGs if there are more than one in the PRG.)

In my case, it didn't find alert.prg, but found "define class alert" within it. IOW, it doesn't seem to search filenames, only certain defining keywords in the source. You may dig into its source if you want - it's somewhere in home()+"tools\xsource\xsource.zip".