
plxormod: Enter or leave xor mode 

DESCRIPTION:

    Enter (when mode is true)  or leave (when mode is false) xor mode for
    those drivers (e.g., the xwin driver) that support it.  Enables
    erasing plots by drawing twice the same line, symbol, etc.	If driver
    is not capable of xor operation it returns a status of false. 

SYNOPSIS:

plxormod(mode, status)

ARGUMENTS:

    mode (PLBOOL, input) :    mode is true means enter xor mode and  mode
    is false means leave xor mode. 

    status (PLBOOL *, output) :    Pointer to status. Returned    modestatus
    of true (false) means driver is capable (incapable) of xor mode. 
