| Sent to | LINEEVENT | 
| Parameters | HTAPILINE    htLine Specifies the TAPI DLL's opaque object handle to the line device. | 
| HTAPICALL    htCall Specifies the TAPI DLL's opaque object handle to the call device. | |
| DWORD    dwMsg The value LINE_CALLDEVSPECIFICFEATURE | |
| DWORD    dwParam1 Device specific. | |
| DWORD    dwParam2 Device specific. | |
| DWORD    dwParam3 Device specific. | |
| Comments | This message is used by a service provider in conjunction with the TSPI_lineDevSpecificFeature function. Its meaning is device specific The TAPI DLL sends the LINE_DEVSPECIFICFEATURE message to applications in response to receiving this message from a Service Provider. The htLine and htCall are translated to the appropriate hCall as the hDevice parameter at the TAPI level. The dwParam1, dwParam2, and dwParam3 paramters are passed through unmodified. | 
| Comparison | There is no directly corresponding message at the TAPI level, although this message is very similar to LINE_DEVSPECIFICFEATURE. At the TSPI level, the device-specific feature messages are split between those reporting events on lines and addresses, and those reporting events on calls. | 
| See Also | Functions:  TSPI_lineDevSpecificFeature Messages: LINE_DEVSPECIFICFEATURE |