MSP430F5632: Pin assignment and changing pin value

I have much code written for other compilers and I want to use the same code for the MSP430F5632. I want to use this style code DisplayRESET = 0; where DisplayRESET is a single pin.  Here is the struct and #defines I have:

struct BitMapping
    {
    unsigned
    Bit0:1,
    Bit1:1,
    Bit2:1,
    Bit3:1,
    Bit4:1,
    Bit5:1,
    Bit6:1,
    Bit7:1;
    }CHR;

#define  Port1_2Base     0x200
#define  Port2OUTCHAR      ( * (char *)Port1_2Base + 0x03)
#define  Port2OUT                  ( * (struct BitMapping *)Port1_2Base + 0x03)

#define  Port5_6Base        0x240
#define  Port5OUT                 ( * (struct BitMapping *)Port5_6Base + 0x02)
#define  Port6IN                     ( * (struct BitMapping *)Port5_6Base + 0x01)
#define  Port6OUT                 ( * (struct BitMapping *)Port5_6Base + 0x03)

#define  Port7_8Base        0x260
#define  Port7IN                      ( * (struct BitMapping *)Port7_8Base + 0x00)
#define  Port7OUT                  ( * (struct BitMapping *)Port7_8Base + 0x02)


#define    DisplayCD    Port6OUT.Bit6
#define    DisplayCE    Port7OUT.Bit7
#define    DisplayWR    Port7OUT.Bit6
#define    DisplayData  Port2OUT.CHR
#define    DisplayRD    Port6OUT.Bit7
#define    DisplayRESET Port5OUT.Bit6

When I compile, everywhere I use a display pin like:

DisplayCD = 0;

I get:

Description    Resource    Path    Location    Type
#42 expression must have arithmetic or pointer type    DisplayRoutines.c    /HRX MSP Ccode/MSP HRX CCODE    line 89    C/C++ Problem

I have not found any examples of pins being used like this.  It's all:

DisplayCD |= BIT6;

or

DisplayCD &=~BIT6;

What do I need to do to use:

DisplayCD = 0;