These are
all the available Dont Show Dialogs that can be set.
The
registry key location is:
HKEY_CURRENT_USER\Identities\{GUID}\Software\Microsoft\Outlook
Express\5.0\Dont Show
Dialogs
Warn on
Mapi Send
Warn on Mapi Send Locked
Mail Empty Subject Warning
News Empty Subject Warning
HTML to Plain Text Warning
Send News Warning
Cancel News Warning
HTML News Warning
Warn Change News Server
Open Messages Warning
Group Filters Warning
Too Much Quoted Warning
Delete Thread Warning
Unsubscribe Warning
Hide Warning
Address Book Delete Warning
Column Hidden Warning