xlAutoFillType

Specifies how the target range is to be filled, based on the contents of the source range.

xlFillCopy	Copy the values and formats from the source range to the target range, repeating if necessary (1)
xlFillDays	Extend the names of the days of the week in the source range into the target range Formats are copied from the source range to the target range, repeating if necessary (5)
xlFillDefault*	Excel determines the values and formats used to fill the target range (0)
xlFillFormats	Copy only the formats from the source range to the target range, repeating if necessary (3)
xlFillMonths	Extend the names of the months in the source range into the target range Formats are copied from the source range to the target range, repeating if necessary (7)
xlFillSeries	Extend the values in the source range into the target range as a series (e.g., '1, 2' is extended as '3, 4, 5') Formats are copied from the source range to the target range, repeating if necessary (2)
xlFillValues	Copy only the values from the source range to the target range, repeating if necessary (4)
xlFillWeekdays	Extend the names of the days of the workweek in the source range into the target range Formats are copied from the source range to the target range, repeating if necessary (6)
xlFillYears	Extend the years in the source range into the target range Formats are copied from the source range to the target range, repeating if necessary (8)
xlFlashFill	(Added in 2013)
xlGrowthTrend	Extend the numeric values from the source range into the target range, assuming that the relationships between the numbers in the source range are multiplicative (e.g., '1, 2,' is extended as '4, 8, 16' assuming that each number is a result of multiplying the previous number by some value) Formats are copied from the source range to the target range, repeating if necessary (10)
xlLinearTrend	Extend the numeric values from the source range into the target range, assuming that the relationships between the numbers is additive (e.g., '1, 2,' is extended as '3, 4, 5' assuming that each number is a result of adding some value to the previous number) Formats are copied from the source range to the target range, repeating if necessary (9)

xlFillCopy

Copy the values and formats from the source range to the target range, repeating if necessary (1)

xlFillDays

Extend the names of the days of the week in the source range into the target range
Formats are copied from the source range to the target range, repeating if necessary (5)

xlFillDefault*

Excel determines the values and formats used to fill the target range (0)

xlFillFormats

Copy only the formats from the source range to the target range, repeating if necessary (3)

xlFillMonths

Extend the names of the months in the source range into the target range
Formats are copied from the source range to the target range, repeating if necessary (7)

xlFillSeries

Extend the values in the source range into the target range as a series (e.g., '1, 2' is extended as '3, 4, 5')
Formats are copied from the source range to the target range, repeating if necessary (2)

xlFillValues

Copy only the values from the source range to the target range, repeating if necessary (4)

xlFillWeekdays

Extend the names of the days of the workweek in the source range into the target range
Formats are copied from the source range to the target range, repeating if necessary (6)

xlFillYears

Extend the years in the source range into the target range
Formats are copied from the source range to the target range, repeating if necessary (8)

xlFlashFill

(Added in 2013)

xlGrowthTrend

Extend the numeric values from the source range into the target range, assuming that the relationships between the numbers in the source range are multiplicative (e.g., '1, 2,' is extended as '4, 8, 16' assuming that each number is a result of multiplying the previous number by some value)
Formats are copied from the source range to the target range, repeating if necessary (10)

xlLinearTrend

Extend the numeric values from the source range into the target range, assuming that the relationships between the numbers is additive (e.g., '1, 2,' is extended as '3, 4, 5' assuming that each number is a result of adding some value to the previous number)
Formats are copied from the source range to the target range, repeating if necessary (9)