RAS Connection Operations
Windows NT version 4.0 provides the
RasPhonebookDlg and
RasDialDlg functions that display the built-in user interface for starting a RAS
connection operation. For most applications, this is the preferred way to start a RAS
connection operation. Windows 95 does not currently support these functions.
The remainder of this section describes the low-level functions for starting a
RAS connection. These functions are available on both Windows NT and Windows
95.
A RAS client application uses the
RasDial function to establish a connection to a RAS server. The
RasDial function starts the connection operation, which is then carried out by the
Remote Access Connection Manager.
The Remote Access Connection Manager is a service that handles the details of
establishing the connection to the remote server. This service also provides
the client with status information during the connection operation. The Remote
Access Connection Manager starts automatically when an application loads the
RASAPI32.DLL.
The
RasDial call specifies the following information when it starts a connection
operation:
- The connection information that the Remote Access Connection Manager needs to establish the connection.
- An optional notification handler that receives progress notifications during the connection operation. If the RasDial call specifies a notification handler, the call is asynchronous; otherwise, it is synchronous.
- An optional RASDIALEXTENSIONS structure to enable or disable extensions to the RasDial operation. The extensions permit a RAS client to directly enable some modem
settings, to control whether RAS uses the prefixes and suffixes in a phonebook
entry, and to support paused states during the connection operation.
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