& btmapemit()
 
  Syntax: btmapemit(<MapDB>,[x, y, z, range,]<message>)
 
  This function emits <message> to all appropriate units on <MapDB>.
 
  The function returns 1 if successful, 0 if failed.
 
  Arguments:
  There are 3 valid forms:
 
  * btmapemit(<MapOBJ>) - emits the message to all units on the map
  * btmapunits(<MapOBJ>,<x>,<y>,<range>) - emits the message to units 
    within <range> of <x>, <y>
  * btmapunits(<MapOBJ>,<x>,<y>,<z>,<range>) - emits the message to 
    all units within <range> of <x>,<y>,<z> 
 
	Note: The function does not take the altitude of a unit into consideration when ascertaining if it is within range UNLESS the third form is used (ie the <z> argument is included)
 
  Continued in btmapemit()2