>How to know how many messages have in my folders sent, inbox and others of Outlook Express?

I think Outlook express doesn't work with automation. For outlook you could do :

oOutlook = CREATEOBJECT( "Outlook.Application" )
oNameSpace = oOutlook.GetNameSpace('MAPI')
oInbox = oNameSpace.GetDefaultFolder( 6 )  && Inbox folder
for each loFolder in oInbox.Folders
 ? loFolder.Name, loFolder.Items.Count, loFolder.UnreadItemCount
endfor
oDeleted = oNameSpace.GetDefaultFolder( 3 )  && Deleted folder
oSent = oNameSpace.GetDefaultFolder( 5 )  && Sent folder
? oDeleted.Items.Count, oSent.Items.Count

Cetin