Basic Telephony Services Functions
The Basic Telephony functions are listed by category in the following tables.
A function is identified as asynchronous
if it will indicate completion in a REPLY message to the application. If the
function always returns its result to the application immediately, the function
is considered synchronous
TAPI Initialization and Shutdown
Line Version Negotiation
Line Status and Capabilities
|Initializes the Telephony API line abstraction for use by the invoking
|Shuts down the application's use of the line Telephony API. Synchronous.
Opening and Closing Line Devices
|Returns the capabilities of a given line device. Synchronous.
|Returns configuration of a media stream device. Synchronous.
|Returns current status of the specified open line device. Synchronous.
|Sets the configuration of the specified media stream device. Synchronous.
|Specifies the status changes for which the application wants to be notified.
|Returns the application's current line and address status message settings.
|Retrieves a device ID associated with the specified open line, address, or
|Allows an application to retrieve an icon for display to the user.
|Causes the provider of the specified line device to display a dialog box that
allows the user to configure parameters related to the line device.
|Displays a dialog box allowing the user to change configuration information
for a line device. Synchronous. Version 0x00010004.
Call States and Events
|Opens a specified line device for providing subsequent monitoring and/or
control of the line. Synchronous.
|Closes a specified opened line device. Synchronous.
Request Recipient Services
|Returns mostly constant information about a call. Synchronous.
|Returns complete call status information for the specified call. Synchronous.
|Sets the application-specific field of a call's information structure.
These functions are used only in support of assisted telephony.
|Registers or deregisters the application as a request recipient for the
specified request mode. Synchronous.
|Gets the next request from the Telephony DLL. Synchronous.
Answering Inbound Calls
Toll Saver Support
Call Privilege Control
|Makes an outbound call and returns a call handle for it. Asynchronous.
|Dials (parts of one or more) dialable addresses. Asynchronous.
Call Handle Manipulation
|Disconnects a call, or abandons a call attempt in progress. Asynchronous.
|Deallocates the specified call handle. Synchronous.
Location and Country Information
|Hands off call ownership and/or changes an application's privileges to a call.
|Returns call handles to calls on a specified line or address for which the
application does not yet have handles. Synchronous.
|Returns a list of call handles that are part of the same conference call as
the call specified as a parameter. Synchronous.
|Displays a dialog box allowing the user to change location and calling card
information. Synchronous. Version 0x00010004.
|Retrieves dialing rules and other information about a given country.
Synchronous. Version 0x00010004.
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