VBA Outlook userform prompt - vba

Question

I have a userform that is prompted when I send emails (works great. not the problem) and from there when I click the buttons on the form it moves that email to the respective folder.
What I now want is for that same userform (rather, a duplicate) to be prompted when a message in my inbox goes from unread to read. The buttons on the userform would then move that message to the respective folder.
Code to bring up userform when sending emails:
Private Sub Application_ItemSend(ByVal Item As Object, cancel As Boolean)
UserForm1.Show vbModal
cancel = False
End Sub
Code snippet for a button of the userform:
Private Sub CommandButton1_Click()
On Error GoTo error_movemessage
Dim myolapp As New Outlook.Application
Dim mynamespace As Outlook.NameSpace
Dim myinbox As Outlook.MAPIFolder
Dim mydestfolder As Outlook.MAPIFolder
Dim myitems As Outlook.Items
Dim myItem As Object
Set mynamespace = myolapp.GetNamespace("MAPI")
Set myinbox = Session.GetDefaultFolder(olFolderInbox).Parent.Folders("RetainPermanently")
Set myitems = myinbox.Items
Set mydestfolder = myinbox
Set myItem = Application.ActiveInspector.CurrentItem
myItem.Move mydestfolder
Unload Me
exit_CommandButton1_Click:
Exit Sub
error_movemessage:
MsgBox "ERROR! " & Err.Description
Resume exit_CommandButton1_Click
End Sub
I searched far and wide for pieces to this puzzle and ultimately ended up unsuccessful. Thank you in advance!
Update:
Private Sub getselecteditem_click()
Dim oApp As New Outlook.Application
Dim oExp As Outlook.Explorer
Dim oSel As Outlook.Selection
Dim oItem As Object
Set oExp = oApp.Application
Set oSel = oExp.Selection
For i = 1 To oSel.Count
Set oItem = oSel.Item(i)
If oItem.Class = olMail Then
End If
Next i
End Sub
Sub oItem_PropertyChange(ByVal Name As String)
Select Case Name
Case "UnRead"
If oItem.UnRead = False Then
UserForm2.Show vbModal
End If
End Select
End Sub
Still doesn't work however.
I realized that I've been making this much harder than it needs to be. I can simply get it to pull up the prompt whenever i load a mailitem that happens to be unread. Here is an update:
Private Sub Application_ItemLoad(ByVal Item As Object)
If Item.Class = olMail Then
If Item.UnRead Then
UserForm2.Show vbModal
End If
End If
End Sub

Answer 1

Firstly, if you move an item to a different folder when the message is sent, you are asking for trouble - if you want the message to be saved in a folder other than Sent Items, set the MailItem.SaveSentMessageFolder property.
To move a message when its read state changes, track the Explorer.SelectionChange event. When SelectionChange event fires, start tracking the events on multiple messages from the Explorer.Selection collection (there can be more than one, but you can get away with just the first one as a proof of concept). When MailItem.PropertyChange event fires on the Unread property, display your prompt and move the message.