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 WSEnvFreGet()
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 Purpose:
 Get the workstation's free DOS environment space.

 Syntax:
 iSpace = WSEnvFreGet()

 Parameters:
 None.

 Returns:
 A numeric value (signed short int).

 Description:
 WSEnvFreGet() returns the amount of free DOS environment space available,
 or NOVERRINT if an error occurs.

 Example:
 // To return the free environment space on the workstation:
 iFreeSpace = WSEnvFreGet()
 if ( iFreeSpace != NOVERRINT )
    ? "The DOS environment has ", iFreeSpace, " bytes free"
 endif