Default value: (nothing)
Indicates the file extensions to be opened with attachments (letting Windows select the application).
Default value: """" (blank), nothing is opened as attachments.
Example: ""dno;doc;"", opens .dno and .doc files as attachments. Please note that if only a single extension is entered, you must add an ; character
Example: ""*"", opens all files as attachments. Please note that you must not add the ; character after *
To open a document as attachment means that you use the program associated with the file extension in Windows.