LINEMESSAGE

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.

typedef struct linemessage_tag {
  DWORD  hDevice;
  DWORD  dwMessageID;
  DWORD_PTR  dwCallbackInstance;
  DWORD_PTR  dwParam1;
  DWORD_PTR  dwParam2;
  DWORD_PTR  dwParam3;
} LINEMESSAGE, FAR *LPLINEMESSAGE;

Members

hDevice

A 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

A 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

A parameter for the message.

dwParam2

A parameter for the message.

dwParam3

A parameter for the message.

Remarks

For information about parameter values passed in this structure, see Line Device Messages.

Requirements

  Windows NT/2000: Requires Windows NT 4.0 SP3 or later.
  Windows 95/98: Requires Windows 95 or later.
  Version: Requires TAPI 2.0 or later.
  Header: Declared in Tapi.h.

See Also

lineInitializeEx, lineGetMessage