What does the number in the AddChart2 VBA macro represent?

Question

I\'ve use my Excel 2013 to record a macro in inserting a chart, a column-clustered chart in my case. In the view code option, it shows me a line of code as below:

Answer 1

This won't directly answer your question, but it will help you figure out what is going on.

This is pure conjecture on my part, but I would guess it's an undocumented bitfield. As you may know a bit field is just a way to use a number. So image we have a Byte variable which can be 8 bits (or flags). So in a byte we can store up to 8 values.

Example: We have field called "DaysOpen" bits 1-7 mean the store is open on that day of the week. (We'll ignore the 8th bit.) So if the store is open M-F that would be binary 0111 1100.

Then you just convert that number to decimal and we see that it's 124.

That variable is a Variant so it could be anything from a Byte to Long meaning it could be storing up to 64 different flags.

As a side note (if you are interested) you can use bit fields like so:

Option Explicit

Public Enum DayFlags
    'Notice these are power of 2.
    dfSunday = 1
    dfMonday = 2
    dfTuesday = 4
    dfWednesday = 8
    dfThursday = 16
    dfFriday = 32
    dfSaturday = 64
End Enum

Sub Example()
    Dim openHours As DayFlags
    'Set the flags:
    openHours = dfMonday Or dfTuesday Or dfThursday
    'See the binary?
    MsgBox Right$("00000000" & Excel.WorksheetFunction.Dec2Bin(openHours), 8)
    'Notice the order is right to left. This is call endianness.
    'You can check for a specific flag like this:
    MsgBox IsOpenOnDay(openHours, dfMonday) & vbNewLine & IsOpenOnDay(openHours, dfFriday)
    'You can add a flag like this:
    openHours = openHours Or dfFriday
    MsgBox IsOpenOnDay(openHours, dfMonday) & vbNewLine & IsOpenOnDay(openHours, dfFriday)
    'You can remove a flag like this:
    openHours = openHours Xor dfFriday
    MsgBox IsOpenOnDay(openHours, dfMonday) & vbNewLine & IsOpenOnDay(openHours, dfFriday)
End Sub

Private Function IsOpenOnDay(ByVal openHours As DayFlags, ByVal day As DayFlags) As Boolean
    IsOpenOnDay = ((openHours And day) = day)
End Function