if (hMailslot == INVALID_HANDLE_VALUE) // Error handling
See MSDN archives: "Mailslot Functions" (CreateMailslot, etc.) – not a paper, but a technical reference. mailslot windows
Use when you are building a client-server chat app, a database connection, or transferring files. Use Mailslots when you want to ping the network or send a "signal" without the overhead of establishing a connection. if (hMailslot == INVALID_HANDLE_VALUE) // Error handling See