PHONE_DEVSPECIFIC message
TAPI sends the PHONE_DEVSPECIFIC message to an application to notify the application about device-specific events occurring at the phone. The meaning of the message and the interpretation of the parameters is implementation-defined.
Parameters
-
hPhone
-
A handle to the phone device.
-
dwCallbackInstance
-
The application's callback instance provided when opening the phone device.
-
dwParam1
-
Device specific.
-
dwParam2
-
Device specific.
-
dwParam3
-
Device specific.
Return value
No return value.
Requirements
| Requirement | Value |
|---|---|
| TAPI version |
Requires TAPI 2.0 or later |
| Header |
|