C++. The list of the available VPN connections on PC

Question

Hi, all.

I need to get list of the available VPN connections on PC (Windows 10) using console app on C++ 17 and how can I change param AllUserConnection of all of this available VPN connections?

Answer 1

Hi, @SergiiMol
I found a Microsoft Github Sample which enumerates the RAS phone-book entries and gets properties of each entry using RasEnumEntries and RasGetEntryProperties.
Wish It’s helpful.

Answer 2

Hi,

Function RasEnumEntries returns the list of VPN connections with struct LPRASENTRYNAME, in this struct is parameter dwFlags ("Specifies whether the entry is in the system phone book in the AllUsers profile, or in the user's profile phone book"). But I can't find how I can change dwFlags this for each VPN connection.

Answer 3

I will answer my own questions :) (maybe it will be useful to someone):

1) A list of all available VPN connections on the current PC can be obtained using function RasEnumEntries and the returned list contains the parameter "dwFlags", which shows this connection common for all users (= REN_AllUsers) or personally for some one user (= REN_User).

2) The parameter "AllUserConnection" for existing VPN connections cannot be changed using WinAPI. But, I have found one way to do it: in the list from item 1), there is a parameter szPhonebookPath - this is the path to a file in the system where stored the data about VPN connections. You can transfer data from the general VPN connections file (default path C: \ ProgramData \ Microsoft \ Network \ Connections \ Pbk \ rasphone.pbk) to the VPN connections file for specific users (default path C: \ Users \ <username> \ AppData \ Roaming \ Microsoft \ Network \ Connections \ Pbk \ rasphone.pbk). But you need to take into account different options: don't duplicate connections; enumerate users who need to add connections; etc.