Looks like this did the trick, for future references.
Function long2bytes$(in:Long)
Local b1 = (in Shr 24) Mod 256
Local b2 = (in Shr 16) Mod 256
Local b3 = (in Shr 8) Mod 256
Local b4 = (in Shr 0) Mod 256
Print "hej "+b1
Return Chr(b1)+Chr(b2)+Chr(b3)+Chr(b4)
EndFunction