a=20141024
c=20141026
formattime, b,, yyyyMMdd

if (a < b)
{
msgbox, %a% is before today - %b%
}
else
{
msgbox, %a% is after today - %b%
}

if (c < b)
{
msgbox, %c% is before today - %b%
}
else
{
msgbox, %c% is after today - %b%
}