.xyz

ftype name_of_assoc="Cblahaprog.exe" "%1" "%*"

myfile.wotsit file1 file2 file3

ftype name_of_assoc="Cblahaprog.exe" -m "%1" "%*"

start "" "{app path}" %1 /edit

start "" "C:Program FilesBeyond Compare 4BCompare.exe" %1 /edit