2.5.2.2 Display

The SPI provides access to a phone's display. The display is modeled as an alphanumeric area with rows and columns. A phone's device capabilities indicate the size of a phone's display as number of rows and number of columns. Both these number are zero if the phone device does not have a display.

TSPI_phoneSetDisplay

Writes information to the display of an open phone device.

TSPI_phoneGetDisplay

Returns the current contents of a phone's display.

When the display of a phone device is changed, a PHONE_STATUS message is sent to the TAPI DLL's callback to notify the TAPI DLL about the state change. Parameters to this message provide an indication of the change.