The LINE_CREATEDIALOGINSTANCE message causes TAPI to create an association between the service provider and an instance of the TUISPI_providerGenericDialog function executing in the context of the application that invoked the asynchronous TSPI function identified by the dwRequestID parameter of the TUISPICREATEDIALOGINSTANCEPARAMS structure pointed to by lpTUISPICreateDialogInstanceParams.
LINE_CREATEDIALOGINSTANCE
htLine = (DWORD) hProvider;
htCall = (DWORD) 0;
dwMsg = LINE_CREATEDIALOGINSTANCE;
dwParam1 = (DWORD) lpTUISPICreateDialogInstanceParams;
dwParam2 = (DWORD) 0;
dwParam3 = (DWORD) 0;
TSPI_providerEnumDevices, TUISPICREATEDIALOGINSTANCEPARAMS