fileDrop.rex

The fileDrop.rex program demonstrates how Rexx programs with the .rex
extensions act as Drop Handlers.  During the installation process on
Windows, files with the extension of .rex are registered with the operating
system as 'drop handlers.'

In Windows explorer, the user can drag and drop any file over the icon for
any Rexx program (one with the .rex extension.) The icon drawn for the drag
operation will change over the Rexx program to one indicating that the Rexx
program accepts dropping.  If the user drops the file on the Rexx program,
the operating system executes the Rexx program and provides the full path
name for the file as the argument to the program.

In Windows Explorer, drag any file over fileDrop.rex and drop it.  The
program demonstrates 'handling' the dropped file.  The file: fileDrop.input
is used to simulate a data input file.  When dropped on fileDrop.rex, the
program will process the data and produce a result.