LINEMESSAGE structure (tapi.h)
The LINEMESSAGE structure contains parameter values specifying a change in status of the line the application currently has open. The lineGetMessage function returns the LINEMESSAGE structure.
Syntax
typedef struct linemessage_tag {
DWORD hDevice;
DWORD dwMessageID;
DWORD_PTR dwCallbackInstance;
DWORD_PTR dwParam1;
DWORD_PTR dwParam2;
DWORD_PTR dwParam3;
} LINEMESSAGE, *LPLINEMESSAGE;
Members
hDevice
Handle to either a line device or a call. The nature of this handle (line handle or call handle) can be determined by the context provided by dwMessageID.
dwMessageID
Line or call device message.
dwCallbackInstance
Instance data passed back to the application, which was specified by the application in the dwCallBackInstance parameter of lineInitializeEx. This DWORD is not interpreted by TAPI.
dwParam1
Parameter for the message.
dwParam2
Parameter for the message.
dwParam3
Parameter for the message.
Remarks
For information about parameter values passed in this structure, see Line Device Messages.
Requirements
| Requirement | Value |
|---|---|
| Header | tapi.h |