Problem Statement

The task is to programmatically obtain the name used to invoke the program. (For example determine whether the user ran "python hello.py", or "python hellocaller.py", a program importing the code from "hello.py".) Sometimes a multiline shebang is necessary in order to provide the script name to a language's internal ARGV. See also Command-line arguments Examples from GitHub.

Let's start with the solution:

#INCLUDE "Win32API.inc"
'[...]
DIM fullpath AS ASCIIZ * 260, appname AS STRING
GetModuleFileNameA 0, fullpath, 260
IF INSTR(fullpath, "\") THEN
    appname = MID$(fullpath, INSTR(-1, fullpath, "\") + 1)
ELSE
    appname = fullpath
END IF

appname = EXE.NAMEX$