SPFieldType
AllDayEvent = 29
Attachments = 19
Boolean = 8
Calculated = 17
Choice = 6
Computed = 12
ContentTypeId = 25
Counter = 5
CrossProjectLink = 22
Currency = 10
DateTime = 4
Error = 24
File = 18
Geolocation = 31
GridChoice = 16
Guid = 14
Integer = 1
Invalid = 0
Lookup = 7
MaxItems = 33
ModStat = 23
MultiChoice = 15
Note = 3
Number = 9
OutcomeChoice = 32
PageSeparator = 26
Recurrence = 21
Text = 2
ThreadIndex = 27
Threading = 13
URL = 11
User = 20
WorkflowEventType = 30
WorkflowStatus = 28