Using GetTempFileName, we can create a unique name for temporary file. It’s useful when your application is using temporary files and you want to save them into default TEMP folder and use a “random” filename.

To get full path to application associated with any file type, we need standard ShellAPI unit and the rest will do the FindExecutable function.

To search for a specific substring within any type of file, we can use this rather complex function.

When you minimize modal window, this window is “hidden” behind (or below) application main form. Using this simple trick, we can minimize also the main application window together with modal “child” window.