SWPUSEEMS()                   Enable or disable use of EMS by swap system.
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 Function : Enable or disable use of EMS by the swap system.

 Syntax   : lValue = SWPUSEEMS(lFlag)

 Return   : The previous setting

 Default  : Enabled

 This function enables or disables use of EMS for swap image storage. The
 return value is the previous setting. If EMS use is enabled, the parent
 image can be saved (and restored) much more quickly that if it were written
 to disk.

 Note that when both XMS and EMS memory are available, the swap system will
 use XMS first.

 Note also that the BLINKER environment variable setting /SEc will override
 this function.