Dealing with 64-bit numbers 32-bit stylee

[SMurf]

Hello,

I'm trying to write a program that will profile my hard drive. I know my Program Files directory at least is over 4GB, so is this code, which uses FindFile, right?:-

// If adding the low DWORD to our count tips the scales...
if (wfd.nFileSizeLow > (0xFFFFFFFF - ulSize))
{
	(*lpDirSizeHigh)++;
	wfd.nFileSizeLow -= 0xFFFFFFFF - ulSize;
	ulSize = 0;
}