Another simple example to count the number of mails in a given (Deleted Items) folder. For me as you can see in the above screenshot it shows 10 in the message box. For this example make sure that Microsoft Outlook is open (I have used Outlook 2007). Write the below code in a new test in QTP and run it.
'using the CreateObject method to create an Outlook Application object.
Set olApp = CreateObject("Outlook.Application")
'GetNameSpace - Returns a NameSpace object of the specified type. It exists because outlook was designed to be usable with different kinds of data, each of which would be identified by its own namespace. So far, only one kind of data is supported in Outlook, MAPI data (Messaging Application Programming Interface).
Set olns = olApp.GetNameSpace("MAPI")
'GetDefaultFolder - Returns a MAPIFolder object that represents the default folder of the requested type for the current profile
Set MyFolder = olns.GetDefaultFolder(3)
msgbox MyFolder.Items.Count
Also See:
QTP & Microsoft Outlook Object Model
QTP Script to get inbox folder name in messagebox
QTP Script to enumerate all folders in Outlook
QTP Script to send an email from Outlook
QTP Script to send an email with attachment from Outlook
QTP Script to read an email from Outlook
QTP Script to download an email attachment from Outlook