What if I call GetProps immediately after SetProps in MAPI?

I have a question in MAPI.

If I invoke SetProps for a property, then without invoking the SaveChanges function, I invoke GetProps immediately for that property, what will happen?

Based on my own test, it seems that GetProps will get the proper property value even without SaveChanges.

Solution

Yes, you can do that just fine. SaveChanges only kicks in some property validation - e.g. if you set plain text PR_BODY, SaveChanges will update RTF and HTML body for HTML/RTF aware stores. SaveChanges will also populate PR_DISPLAY_TO/CC/BCC properties based on the recipient table (if you updated recipients).

Other than that, GetProps will return the same properties set with SetProps without having to call SaveChanges.

custom ribbon not appearing in outlook when when running a build in vs
Retrieve email address from Outlook using Word VBA
JAVA email tracking pixel keep track of reading time
Send Email attachment to S3 bucket
Include hyperlinks in Excel range in html email
Office 365 Exchange Online permission is not visible for registered application in azure active directory
VBA in Outlook doesn't find Inbox messages
How can I detect when an existing meeting date and time changes?
Send different emails via Excel VBA based on cell value
Powershell Problem in passing a variable to $mail.HTMLBody, the mail is empty when using a $variable but works when its direct string = "asbdas"
Items.Restrict not consistently working across different values of datetime. ( Excel VBA, MS Outlook)
Creating a Bare Bones, Unmanaged Outlook/Office Addin
Detecting Outlook autoreply/out-of-office emails
How to fetch group calendar events using Azure application-only permissions? Error: Access is denied. Check credentials and try again
VSTO Outook: Change the sender text from the inspector window
Check if Userform exists
Add file as attachment and send email with outlook and visualworks smalltalk
Hot to get a Developer Tools window for the web-based Outlook desktop client?
VBA script in Outlook that runs when an email is sent
Runtime Error - Set olRule = olRules.Item(i) after Microsoft update, where rules setup as 'Through the Specified Account'
.ics file to save to outlook calendar automatically when the email it is attatched to is opened
Adding attachment to Outlook.MailItem using unbound textbox entry
Change appointment subject associated with incoming invite mail
Loop that creates attachment files from scratch
Encrypt Outlook Mail Programmatically via VBA
How to automatically update data from outlook to sql using c#, When someone rejects my meeting request it should be updated to my database
Group table data by common value in column, for Outlook message
Microsoft Graph API - "Decline event" call fails
Paste clipboard in outlook email in normal order
Inserting Signature into Outlook email from Excel VBA