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Define act as function?

I've been using defines as fucntions like this:

sbit DRIVE_PIN05 = P1^3;

#define DRIVE_PIN05_HIGH (P1MDOUT |= 0x08);(DRIVE_PIN05 = 0)
#define DRIVE_PIN05_LOW (P1MDOUT |= 0x08);(DRIVE_PIN05 = 1)
#define DRIVE_PIN05_OFF (P1MDOUT &= 0xF7);(DRIVE_PIN05 = 1)

Is it there anything wrong with doing it like this?
It gives me problems when I include the above define into another define, why?

#define SUPPLY_ON (DRIVE_PIN05_HIGH);(DRIVE_PIN24_LOW)
#define SUPPLY_OFF (DRIVE_PIN05_OFF);(DRIVE_PIN24_OFF)

Maybe my syntax is incorrect or it can't be done?

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