[local external function declaration]
FUNCTION ulong GetModuleFileName (ulong hinstModule, ref string lpszPath, ulong cchPath )  &
   LIBRARY "KERNEL32.DLL" &
   ALIAS FOR "GetModuleFileNameA;ansi"  // ;ansi  required for PB10 or better

[powerscript]
ClassDefinition  lcd

String ls_fullpath 
ulong lul_handle, lul_length = 512

IF handle(getapplication()) = 0 THEN
    // running from the IDE
    lcd=getapplication().classdefinition
    ls_fullpath = lcd.libraryname
ELSE
    // running from EXE
    lul_handle = handle( getapplication() )
    ls_fullpath=space(lul_length) 
    GetModuleFilename( lul_handle, ls_fullpath, lul_length )
END IF

MessageBox("", ls_fullpath)