How to determine Outlook selected mail mode using C# add-in?

Question

Hi all,
I need to check if a selected MailItem is in compose mode. I use Outlook 2013. MailItem.Sent doesn't help. E.g. I select some e-mail that was clicked Reply and edited and now has a draft status. MailItem.Sent for that item is true. Is that possible to check
if the selected mail in compose mode or check mail draft status?
Thansk in advance.

Answer 1

Hello Maksidrom,
The Sent property is set once and keep the value the rest of the time.
The Outlook object model doesn't provide any other properties for this. You need to use a low-level property -
PR_MESSAGE_FLAGS
. The PR_MESSAGE_FLAGS property contains a bitmask of flags indicating the origin and current state of a message. In general, you are interested in the following value:
MSGFLAG_UNSENT - The message is still being composed. It is saved, but has not been sent. Typically, this flag is cleared after the message is sent.
The DASL name for the property is "http://schemas.microsoft.com/mapi/proptag/0x0E070003". You can use it to get the value using the
PropertyAccessor class. For example:
Sub DemoPropertyAccessorGetProperty()
Dim PropName, Header As String
Dim oMail As Object
Dim oPA As Outlook.PropertyAccessor
'Get first item in the inbox
Set oMail = _
Application.Session.GetDefaultFolder(olFolderInbox).Items(1)
'PR_TRANSPORT_MESSAGE_HEADERS
PropName = "http://schemas.microsoft.com/mapi/proptag/0x007D001E"
'Obtain an instance of PropertyAccessor class
Set oPA = oMail.PropertyAccessor
'Call GetProperty
Header = oPA.GetProperty(PropName)
Debug.Print (Header)
End Sub