Eu encontrei, é um objeto FILETIME e eu poderia convertê-lo usando uma macro do Excel:
Option Explicit
Tipo privado FILETIME dwLowDateTime As Long dwHighDateTime as Long Tipo Final
Tipo Privado SYSTEMTIME wYear As Integer wMonth As Integer wDayOfWeek As Integer wDay As Integer wHour As Integer wMinute As Integer wSegundo como inteiro wMilliseconds As Integer Tipo Final
Private Declare a função FileTimeToSystemTime Lib "kernel32" (lpFileTime como FILETIME, lpSystemTime como SYSTEMTIME) como longo
Function ConvertDate(test)
ConvertDate = Bit64ToDate(test)
'4/26/2010 8:32:27 PM
End Function
Private Function Bit64ToDate(Bit64) As Date
Dim High As Long, Low As Long, ft As FILETIME, st As SYSTEMTIME
GetTwoLongsFromInt64 [Bit64], ft.dwHighDateTime, ft.dwLowDateTime
FileTimeToSystemTime ft, st
Bit64ToDate = SystemTimeToVBTime(st)
End Function
'the following function - thanks to
'http://doc.xceedsoft.com/products/Xceedzip/64_bit_values.html
Private Sub GetTwoLongsFromInt64(ByVal cInt64 As Double, ByRef lHigh As Long, ByRef lLow As Long)
Dim cRemainder As Double
lHigh = CLng(Fix(cInt64 / 4294967296#))
cRemainder = cInt64 - (lHigh * 4294967296#)
If (cRemainder <= 2147483647#) Then
lLow = CLng(cRemainder)
Else
cRemainder = cRemainder - 4294967296#
lLow = (CLng(cRemainder))
End If
End Sub
'the following function - thanks to
'http://www.cpearson.com/excel/FileTimes.htm
Private Function SystemTimeToVBTime(SysTime As SYSTEMTIME) As Date
With SysTime
SystemTimeToVBTime = DateSerial(.wYear, .wMonth, .wDay) + _
TimeSerial(.wHour, .wMinute, .wSecond)
End With
End Function