What is the easiest way to replace running an external command in cmd with a GUI program with Drag & Drop?

Question

PowerShell

Some .cmd file has an external command with parameters to run, for which the path to the source file and the target is specified.
Tell me, what is the easiest way to replace such a cmd with a GUI program, preferably with Drag & Drop? To drag the file onto the form and in response the program, after executing an external command, a dialog for saving the file was opened. Designed for a user who does not know how to work with the command line.
Preferably with minimal dependencies and size, as well as open source.

Answer 1

you can drag and drop files in cmd.
Take and write the following
myscript.bat

echo "I want to execute %1 file"
pause

And drag the desired file to it.
Customize

Answer 2

If you need to enter filenames, you can do so directly in the batch file.
Command
Will prompt you to enter a file name. You can enter manually, or you can drag any file from the explorer or from the desktop. The full name of the file will be in the filename variable:
echo.%filename%