>I'd like to search through all applications (which are located under APPL directory in its own directories with subdirectories) and search for SetFocus() in Form's.Init.

Use Adir to get every SCX file, do a MODI FILE NOWAIT on all files found, then do an aSelObj(aA, 1) and this will tell youf is SetFOcus() is in the Init method:

?'SetFocus()' $ aA[1].ReadMethod('init')