lineCallbackFunc
The lineCallbackFunc
function is a placeholder for the application-supplied function name.
VOID FAR PASCAL lineCallbackFunc(
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DWORD hDevice, |
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DWORD dwMsg, |
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DWORD dwCallbackInstance, |
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DWORD dwParam1, |
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DWORD dwParam2, |
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DWORD dwParam3 |
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); |
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Parameters
hDevice
A handle to either
a line device or a call associated with the callback. The nature of this handle
(line handle or call handle) can be determined by the context provided by dwMsg.
Applications must use the DWORD type for this parameter because using the HANDLE
type may generate an error.
dwMsg
A line or
call device message.
dwCallbackInstance
Callback
instance data passed back to the application in the callback. This DWORD is not
interpreted by TAPI.
dwParam1
A parameter
for the message.
dwParam2
A parameter
for the message.
dwParam3
A parameter
for the message.
Remarks
For
information about parameter values passed to this function, see Line Device
Messages.
All callbacks
occur in the application's context. The callback function must reside in a DLL
or application module.