Telephony

Windows provides support for creating applications with telephone communications, or telephony, services. Those services include the Assisted Telephony services for adding minimal, but useful telephonic functionality to applications, and the full Telephony API, for implementing full telephonic applications.

Note
For more information about creating applications using the Microsoft Windows Telephony API (TAPI), see the documentation included in the Win32 SDK.

You should consider the following guidelines when developing telephony applications:

• Provide separate fields for users to enter country code, area code, and a local number. You may use auto-exit style navigation to facilitate the number entry. You can also use a drop-down list box to allow users to select a country code. The system provides support for listing available codes.
• Provide access to the TAPI Dialing Properties property sheet window wherever a user enters a phone number. This window provides a consistent and easy interface for users.
• Use the modem configuration interfaces provided by the system. If the user has not installed a modem, run the Windows TAPI modem installation wizard.