Establishing a Link
Before an application can call the functions of Win32 Telephony for using a
line device, it must take the following steps:
- Initialize the TAPI environment and TAPI's functions with an initialization
function. Invoking this function also informs the application of the number of
line devices available.
- Negotiate the API version, and if necessary, negotiate the Extensions version.
An application must take the preceding steps for each line device it intends
to use.
Applications should not invoke
phoneInitializeEx without subsequently opening a phone (at least for monitoring). If the
application is not monitoring and not using any devices, it should call
phoneShutdown so that memory resources allocated by the TAPI dynamic-link library can be
released if unneeded, and library itself can be unloaded from memory while not
needed.
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