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C/C++ Source or Header  |  1996-04-28  |  21KB  |  679 lines
  1.  
  2. #include <windows.h> 
  3. #include <windowsx.h> 
  4. #include "line.h" 
  5. #include "tapi.h"
  6.  
  7. #define BUFSIZE 256
  8. #define APIHIVERSION     0x00010028    /* 1.40 */
  9. #define APILOWVERSION    0x00010000    /* 1.0 */
  10. #define EXTHIVERSION     0x00010005    /* 1.5 */
  11. #define EXTLOWVERSION    0x00000009    /* 0.9 */ 
  12. #define OWNER        0
  13. #define MONITOR      1
  14. #define MAX_CALL        3
  15. #define MAX_LINE        2
  16.  
  17.  
  18. #if defined (WIN32)
  19.     #define IS_WIN32 TRUE
  20. #else
  21.     #define IS_WIN32 FALSE
  22. #endif
  23.  
  24. #define IS_NT      IS_WIN32 && (BOOL)(GetVersion() < 0x80000000)
  25. #define IS_WIN32S  IS_WIN32 && (BOOL)(!(IS_NT) && (LOBYTE(LOWORD(GetVersion()))<4))
  26. #define IS_WIN95   (BOOL)(!(IS_NT) && !(IS_WIN32S)) && IS_WIN32
  27.  
  28. LPCTSTR lpszAppName = "lineGetIcon";
  29. LPCTSTR lpszTitle   = "lineGetIcon"; 
  30.  
  31. HINSTANCE hInst;   // current instance
  32. HWND hWnd;         // parent window handle
  33. HWND hListWnd;     // listbox
  34. HDC  hdc;
  35. TEXTMETRIC  tm ;
  36.  
  37. BOOL RegisterWin95( CONST WNDCLASS* lpwc );
  38.  
  39.  
  40. int APIENTRY WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance,
  41.                       LPTSTR lpCmdLine, int nCmdShow)
  42. {
  43.    MSG      msg;
  44.    WNDCLASS wc;
  45.  
  46.    wc.style         = CS_HREDRAW | CS_VREDRAW;
  47.    wc.lpfnWndProc   = (WNDPROC)WndProc;       
  48.    wc.cbClsExtra    = 0;                      
  49.    wc.cbWndExtra    = 0;                      
  50.    wc.hInstance     = hInstance;              
  51.    wc.hIcon         = LoadIcon (hInstance, lpszAppName); 
  52.    wc.hCursor       = LoadCursor(NULL, IDC_ARROW);
  53.    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
  54.    wc.lpszMenuName  = lpszAppName;              
  55.    wc.lpszClassName = lpszAppName;              
  56.  
  57.    if ( IS_WIN95 )
  58.    {
  59.       if ( !RegisterWin95( &wc ) )
  60.          return( FALSE );
  61.    }
  62.    else if ( !RegisterClass( &wc ) )
  63.       return( FALSE );
  64.  
  65.    hInst = hInstance; 
  66.  
  67.    hWnd = CreateWindow( lpszAppName, 
  68.                         lpszTitle,    
  69.                         WS_OVERLAPPEDWINDOW, 
  70.                         CW_USEDEFAULT, 0, 
  71.                         CW_USEDEFAULT, 0,  
  72.                         NULL,              
  73.                         NULL,              
  74.                         hInstance,         
  75.                         NULL               
  76.                       );
  77.  
  78.    if ( !hWnd ) 
  79.       return( FALSE );
  80.  
  81.    ShowWindow( hWnd, nCmdShow ); 
  82.    UpdateWindow( hWnd );         
  83.  
  84.    while( GetMessage( &msg, NULL, 0, 0) )   
  85.    {
  86.       TranslateMessage( &msg ); 
  87.       DispatchMessage( &msg );  
  88.    }
  89.  
  90.    return( msg.wParam ); 
  91. }
  92.  
  93.  
  94. BOOL RegisterWin95( CONST WNDCLASS* lpwc )
  95. {
  96.     WNDCLASSEX wcex;
  97.  
  98.    wcex.style         = lpwc->style;
  99.    wcex.lpfnWndProc   = lpwc->lpfnWndProc;
  100.    wcex.cbClsExtra    = lpwc->cbClsExtra;
  101.    wcex.cbWndExtra    = lpwc->cbWndExtra;
  102.    wcex.hInstance     = lpwc->hInstance;
  103.    wcex.hIcon         = lpwc->hIcon;
  104.    wcex.hCursor       = lpwc->hCursor;
  105.    wcex.hbrBackground = lpwc->hbrBackground;
  106.    wcex.lpszMenuName  = lpwc->lpszMenuName;
  107.    wcex.lpszClassName = lpwc->lpszClassName;
  108.  
  109.    // Added elements for Windows 95.
  110.    //...............................
  111.    wcex.cbSize = sizeof(WNDCLASSEX);
  112.    wcex.hIconSm = LoadImage(wcex.hInstance, lpwc->lpszClassName, 
  113.                             IMAGE_ICON, 16, 16,
  114.                             LR_DEFAULTCOLOR );
  115.             
  116.    return RegisterClassEx( &wcex );
  117. }
  118.  
  119. #define CONFCALL    1
  120. #define CONSULT      2
  121.  
  122. enum CallState
  123. {
  124.     Idle,
  125.     Offering,
  126.     Accepted,
  127.     Dialtone,
  128.     Dialing,
  129.     Ringback,
  130.     Busy,
  131.     Special,
  132.     Connected,
  133.     Proceeding,
  134.     Conferenced,
  135.     Onholdconf,
  136.     Disconnected,
  137.     Unknown
  138. };
  139.  
  140. typedef struct tagMYINFO      // general application information
  141. {
  142.     HLINEAPP lineApp;         // instance handle TAPI gives back to us                                                                              through lineInitialize()
  143.     DWORD dwNumDevices;       // number of available devices
  144.     DWORD dwAPIVersion;       // API version the line supports
  145.      DWORD dwExtVersion;           // extended version
  146.     char szLocation[128];     // location        
  147.      char szCallingCard[128];  // calling card being used
  148.     char szAreaCode[4];       // area code       
  149.     char szCountry[128];      // calling card being used
  150. } MYINFO;
  151.  
  152. typedef struct tagLINEINFO  // information on an open line
  153. {
  154.     DWORD dwNumAddress;     // number of available addresses on the line 
  155.     HLINE hLine;            // handle to the line as returned by lineOpen 
  156.      DWORD dwLineID;         // the line ID of this line
  157.     char  szLineName[128];  // the line's name 
  158.  
  159. } MYLINEINFO;
  160.  
  161. typedef struct tagMYCALLINFO  //information on a call                     
  162. {
  163.     
  164. DWORD       eCallState;    // TAPI's line call State, set as user-defined enums
  165. DWORD      dwRequestID;   // requestID returned by async TAPI functions lineMakeCall/lineDropCall
  166. DWORD      dwAddressID;   // the originating address ID of the call being made 
  167. LPCSTR     lpszAddress;    
  168. HLINE     hLine;         // handle to the line 
  169. HCALL        hCall;         // handle to the call 
  170.    
  171. char szDialString[TAPIMAXDESTADDRESSSIZE];  //phone number being dialed
  172. char szDialStringOriginal[TAPIMAXDESTADDRESSSIZE];
  173. char szDialStringCanonical[TAPIMAXDESTADDRESSSIZE];
  174. char szCalledParty[TAPIMAXCALLEDPARTYSIZE]; // name of the party
  175. DWORD dwTranslateResults;
  176.         
  177. } MYCALLINFO;
  178.  
  179. enum CallAction     // Declare enum type CallAction (used in lineSetAppSpecific)
  180. {
  181.    HOLD,            // hold the call
  182.    TRANSFER,        // transfer the call
  183.    REDIRECT,        // redirect the call
  184.    DROP,            // drop the call
  185.    PARK             // park the call
  186. }; 
  187.  
  188. MYINFO myInfo;          //instance of MYINFO structure
  189. MYLINEINFO myLineInfo[MAX_LINE];  //instance of MYLINEINFO structure
  190. MYCALLINFO myCallInfo[MAX_CALL]; //array of MYCALLINFO strcuture
  191.  
  192. LONG lRet;        //return code
  193. char buf[BUFSIZE];    // buffer for debug message
  194.  
  195. DWORD dwLineID = 0;
  196. DWORD i;
  197. LINEEXTENSIONID        ext_id;
  198. LINEDEVCAPS            *plineDevCaps;
  199. LINEADDRESSCAPS        *plineAdddressCaps;
  200. LINEADDRESSSTATUS     *plineAddressStat;
  201. LINECALLINFO            *plineCallInfo;
  202. LINECALLSTATUS         *plineCallStatus;
  203. LINECALLLIST            *plineCallList;
  204. LINEDEVSTATUS           *plineDevStatus;
  205. LINETRANSLATECAPS       *plineTranslateCaps;
  206. LINETRANSLATEOUTPUT  *plineTranslateOutput;
  207. LINECALLPARAMS           *plineCallParams;
  208. LINEDEVSTATUS           *plineDevStatus;
  209. LINEFORWARDLIST        *plineForwardList;
  210. LINETRANSLATECAPS       *plineTranslateCaps;
  211. LINEREQMAKECALL       lineReqMakeCall;
  212. VARSTRING               *pDeviceConfig;
  213. VARSTRING               *pDeviceId;
  214. VARSTRING               *pNonDirAddress;
  215.  
  216. LPLINELOCATIONENTRY  lineLocEntry;
  217. LPLINECARDENTRY        lineCardEntry;
  218. LINECOUNTRYLIST         *plineCountryList;
  219. LPLINECOUNTRYENTRY   lineCE;
  220.  
  221. LPSTR                lpData;
  222.  
  223. HICON                hIcon = NULL;        //used in lineGetID();
  224. DWORD                dwNumRings;    //used in lineGetNumRings();
  225. HCALL                hConsultCall; //handle to consultation linePrepareAddToConference, SetupConference
  226. HCALL                hConfCall; //handle to consultation linePrepareAddToConference, SetupConference   
  227. HCALL                hParkedCall;
  228.  
  229. DWORD                dwCompletionID;  //used in lineCompleteCall()
  230.  
  231. char                szName[128];
  232. char                szNumber[128];
  233. char                szDigits[128];
  234. char                szDevConfig[128];
  235.  
  236. LONG lRet;
  237. char buf[BUFSIZE];
  238.  
  239. LRESULT CALLBACK WndProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
  240. {
  241.    switch( uMsg )
  242.    {
  243.       case WM_COMMAND :
  244.          switch( LOWORD( wParam ) )
  245.          {
  246.             case IDM_RUN :
  247.              // lineGetIcon
  248.              //..................................
  249.              lRet = lineGetIcon(myLineInfo[OWNER].dwLineID, "tapi/line", &hIcon);
  250.              
  251.              if (lRet == 0)
  252.                 {
  253.                hdc = GetDC (hWnd);
  254.                DrawIcon(hdc, 10, 10, hIcon);
  255.                ReleaseDC(hWnd, hdc);
  256.                }
  257.                   else 
  258.                 {
  259.                    wsprintf( buf,"phoneGetIcon failed, err=x%lx", lRet);
  260.                SendMessage(hListWnd, LB_INSERTSTRING, (WPARAM) -1, (LONG) (LPSTR) buf) ;
  261.                    lineError(lRet);
  262.                 }    
  263.            
  264.              break;                
  265.                break;                      
  266.             
  267.             case IDM_ABOUT :
  268.             {
  269.                 DialogBox( hInst, "AboutBox", hWnd, (DLGPROC)About );
  270.                break;
  271.             }
  272.  
  273.             case IDM_EXIT :
  274.             {
  275.                for (i = 0; i < myInfo.dwNumDevices; i++)
  276.                        lineClose(myLineInfo[i].hLine);
  277.                     lineShutdown(myInfo.lineApp);
  278.                DestroyWindow( hWnd );
  279.                break;
  280.             }
  281.             }                  
  282.                  
  283.          break;
  284.  
  285.       case WM_CREATE :
  286.       {
  287.          hdc = GetDC (hWnd) ;
  288.          GetTextMetrics (hdc, &tm) ;
  289.          ReleaseDC (hWnd, hdc) ;
  290.  
  291.          hListWnd = CreateWindowEx( 0, "listbox", 
  292.                         " ",    
  293.                         WS_CHILD | WS_VISIBLE,  
  294.                         tm.tmAveCharWidth, tm.tmHeight * 3, 
  295.                         tm.tmAveCharWidth * 16 +
  296.                                    GetSystemMetrics (SM_CXVSCROLL), 
  297.                         tm.tmHeight * 5,  
  298.                         hWnd,              
  299.                         NULL,              
  300.                         hInst,         
  301.                         NULL               
  302.                         );
  303.  
  304.          
  305.          //lineInitialize
  306.             //...............................................
  307.          lRet = lineInitialize(&myInfo.lineApp, hInst, lineCallback, NULL, &myInfo.dwNumDevices);
  308.          if (lRet == 0) 
  309.          {
  310.             wsprintf (buf, "lineInitialize suceeded!");
  311.               //SendMessage(hListWnd, LB_INSERTSTRING, (WPARAM) -1, (LONG) (LPSTR) buf) ;
  312.            }
  313.          else 
  314.           {
  315.                wsprintf ( buf,"lineInitialize failed, err=x%lx",lRet);
  316.                //SendMessage(hListWnd, LB_INSERTSTRING, (WPARAM) -1, (LONG) (LPSTR) buf) ;
  317.                lineError(lRet);
  318.                break;
  319.          }                    
  320.          
  321.          //lineNegotiateAPIVersion
  322.           //...............................................
  323.          lRet = lineNegotiateAPIVersion(myInfo.lineApp, 0, APILOWVERSION, APIHIVERSION, 
  324.                                            &myInfo.dwAPIVersion, &ext_id);
  325.          if (lRet == 0)                        
  326.          {
  327.             wsprintf (buf, "lineNegotiateAPIVersion suceeded!");
  328.               //SendMessage(hListWnd, LB_INSERTSTRING, (WPARAM) -1, (LONG) (LPSTR) buf) ;
  329.          }
  330.          else 
  331.           {
  332.                wsprintf (buf, "lineNegotiateAPIVersion failed, err=x%lx",
  333.                            lRet);
  334.                //SendMessage(hListWnd, LB_INSERTSTRING, (WPARAM) -1, (LONG) (LPSTR) buf) ;
  335.                lineError(lRet);
  336.                lineShutdown (myInfo.lineApp);
  337.             break;
  338.          }
  339.  
  340.           //lineNegotiateExtVersion
  341.           //...............................................
  342.          lRet = lineNegotiateExtVersion(myInfo.lineApp, 0, myInfo.dwAPIVersion, EXTLOWVERSION, 
  343.                                            EXTHIVERSION, &myInfo.dwExtVersion);
  344.          if (lRet == 0)                        
  345.          {
  346.             wsprintf (buf, "lineNegotiateExtVersion suceeded!");
  347.             //SendMessage(hListWnd, LB_INSERTSTRING, (WPARAM) -1, (LONG) (LPSTR) buf) ;
  348.  
  349.          }
  350.           else 
  351.           {
  352.                wsprintf (buf, "lineNegotiateExtVersion failed, err=x%lx",
  353.                      lRet);
  354.               //SendMessage(hListWnd, LB_INSERTSTRING, (WPARAM) -1, (LONG) (LPSTR) buf) ;
  355.               lineError(lRet);
  356.       
  357.          }
  358.  
  359.           //lineGetDevCaps
  360.           //for each line device, get capabilities until we find one that supports
  361.          //interactive voice 
  362.           //...............................................
  363.          plineDevCaps = (LINEDEVCAPS *) calloc (1, sizeof(LINEDEVCAPS)+1000);
  364.          plineDevCaps->dwTotalSize = sizeof(LINEDEVCAPS) + 1000;
  365.          for (i = 0; i < myInfo.dwNumDevices; i++)
  366.          {
  367.             lineGetDevCaps(myInfo.lineApp, i, myInfo.dwAPIVersion, 0, plineDevCaps);
  368.             if (plineDevCaps->dwMediaModes & LINEMEDIAMODE_INTERACTIVEVOICE) 
  369.             {
  370.                
  371.                myLineInfo[i].dwNumAddress = plineDevCaps->dwNumAddresses;
  372.                   myLineInfo[i].dwLineID = i;
  373.                    if (plineDevCaps->dwLineNameSize > 0)
  374.                           strcpy(myLineInfo[i].szLineName,((LPSTR)(plineDevCaps)+plineDevCaps->dwLineNameOffset));
  375.              }
  376.           }
  377.  
  378.          //lineOpen
  379.           //................................................................
  380.           lRet = lineOpen(myInfo.lineApp,myLineInfo[OWNER].dwLineID,&myLineInfo[OWNER].hLine,
  381.                            myInfo.dwAPIVersion,0,(DWORD)lineCallback, LINECALLPRIVILEGE_NONE,
  382.                             LINEMEDIAMODE_DATAMODEM, NULL);
  383.           if (lRet == 0)
  384.           {
  385.             wsprintf (buf, "lineOpen suceeded!");
  386.             //SendMessage(hListWnd, LB_INSERTSTRING, (WPARAM) -1, (LONG) (LPSTR) buf) ;     
  387.          }
  388.            else 
  389.            {
  390.                wsprintf ( buf,"lineOpen failed, err=x%lx", lRet);
  391.                SendMessage(hListWnd, LB_INSERTSTRING, (WPARAM) -1, (LONG) (LPSTR) buf) ;
  392.                lineError(lRet);
  393.           }
  394.        
  395.          break;
  396.       }
  397.       
  398.       case WM_SIZE:
  399.           MoveWindow(hListWnd,0, 0, LOWORD(lParam), HIWORD(lParam), TRUE);
  400.          break;
  401.  
  402.       case WM_DESTROY :
  403.               PostQuitMessage(0);
  404.               break;
  405.  
  406.       default :
  407.             return( DefWindowProc( hWnd, uMsg, wParam, lParam ) );
  408.    }
  409.  
  410.    return( 0L );
  411. }
  412.  
  413.  
  414.  
  415.  
  416. /****************************************************************************
  417.     FUNCTION: lineCallback
  418.     PURPOSE:  callback function handles line events
  419. ****************************************************************************/
  420. LRESULT CALLBACK lineCallback (DWORD dwDevice, DWORD dwMsg,
  421.                                        DWORD dwCallbackInst, DWORD dwParam1,
  422.                                        DWORD dwParam2,DWORD dwParam3)
  423. {
  424.    switch (dwMsg)
  425.    {
  426.       case LINE_CALLSTATE:
  427.        {
  428.             for (i = 0; i < MAX_CALL; i++)
  429.            {
  430.                 if (dwDevice = (DWORD) myCallInfo[i].hCall) 
  431.                  switch (dwParam1)
  432.                  {
  433.                     case LINECALLSTATE_IDLE:
  434.                         myCallInfo[i].eCallState = Idle;
  435.                   break;
  436.                     
  437.                     case LINECALLSTATE_OFFERING:
  438.                   myCallInfo[i].eCallState = Offering;
  439.                   // call lineAccept
  440.                   //...............................
  441.                   lRet = lineAccept(myCallInfo[0].hCall, NULL, 0);
  442.                   if (lRet > 0)
  443.                   {
  444.                      //completed asynchronously..........
  445.                      wsprintf (buf, "lineAccept in progress!"); 
  446.                      SendMessage(hListWnd, LB_INSERTSTRING, (WPARAM) -1, (LONG) (LPSTR) buf) ;         
  447.                   }
  448.                   else 
  449.                   {
  450.                      wsprintf ( buf," lineAccept failed, err=x%lx", lRet);
  451.                      SendMessage(hListWnd, LB_INSERTSTRING, (WPARAM) -1, (LONG) (LPSTR) buf) ;         
  452.                      lineError(lRet);
  453.                   }
  454.                   break;
  455.  
  456.                     
  457.                     case LINECALLSTATE_ACCEPTED:
  458.                         myCallInfo[i].eCallState = Accepted;
  459.                         break;
  460.                     
  461.                     case LINECALLSTATE_DIALTONE:
  462.                         myCallInfo[i].eCallState = Dialtone;
  463.                   break;
  464.                     
  465.                     case LINECALLSTATE_DIALING:
  466.                         myCallInfo[i].eCallState = Dialing;
  467.                         break;
  468.                   
  469.                   case LINECALLSTATE_RINGBACK:
  470.                         myCallInfo[i].eCallState = Ringback;
  471.                         break;
  472.             
  473.                     case LINECALLSTATE_BUSY:
  474.                         myCallInfo[i].eCallState = Busy;
  475.                         break;
  476.             
  477.                     case LINECALLSTATE_SPECIALINFO:
  478.                         myCallInfo[i].eCallState = Special;
  479.                        break;
  480.             
  481.                     case LINECALLSTATE_CONNECTED:
  482.                        myCallInfo[i].eCallState = Connected;
  483.                   break;
  484.  
  485.                     case LINECALLSTATE_PROCEEDING:
  486.                         myCallInfo[i].eCallState = Proceeding;
  487.                        break;
  488.             
  489.                     case LINECALLSTATE_CONFERENCED:
  490.                         myCallInfo[i].eCallState = Conferenced;
  491.                        break;
  492.             
  493.                     case LINECALLSTATE_ONHOLDPENDCONF:
  494.                         break;
  495.                 
  496.                case LINECALLSTATE_DISCONNECTED:
  497.                         myCallInfo[i].eCallState = Disconnected;
  498.                        break;
  499.             
  500.                     case LINECALLSTATE_UNKNOWN:
  501.                         myCallInfo[i].eCallState = Unknown;
  502.                        break;
  503.        
  504.              }
  505.           }
  506.        }
  507.  
  508.        case LINE_MONITORMEDIA:
  509.            break;
  510.  
  511.        case LINE_MONITORDIGITS:
  512.           break;
  513.  
  514.          case LINE_MONITORTONE:
  515.           break;
  516.    
  517.        //error handling for functions completed asynchronously
  518.         //.....................................................
  519.        case LINE_REPLY:
  520.         {
  521.             for (i = 0; i < MAX_CALL; i++)
  522.            {
  523.                 if (dwParam1 = myCallInfo[i].dwRequestID)
  524.                {
  525.                    if (dwParam2 != 0)
  526.                    {
  527.                        lineError((LONG) dwParam2);
  528.                        break;
  529.                    }
  530.                }
  531.            }
  532.         break;
  533.         }
  534.  
  535.         case LINE_GENERATE:
  536.           break;
  537.      
  538.        case LINE_REQUEST:
  539.          break;
  540.  
  541.         case LINE_GATHERDIGITS:
  542.            break;
  543.    }
  544.  
  545.    return (TRUE);
  546. } 
  547.  
  548.  
  549. /****************************************************************************
  550.     FUNCTION: lineError
  551.     PURPOSE:  line error messages
  552. ****************************************************************************/
  553. void lineError (LONG lrc)
  554. {
  555.  switch (lrc) {
  556.     case LINEERR_INVALAPPHANDLE:
  557.        MessageBox (hWnd, "Invalid app handle.", "", MB_OK);
  558.        break;
  559.     case LINEERR_BADDEVICEID:
  560.        MessageBox (hWnd,"The specified line device ID is out of range.", "", 
  561.                    MB_OK);
  562.        break;
  563.     case LINEERR_INCOMPATIBLEAPIVERSION:
  564.        MessageBox (hWnd, "Incompatible API version.", "", MB_OK);
  565.        break;
  566.     
  567.     case LINEERR_ADDRESSBLOCKED:
  568.        MessageBox (hWnd, "Address was blocked.", "", MB_OK);
  569.        break;
  570.  
  571.     case LINEERR_BEARERMODEUNAVAIL:
  572.        MessageBox (hWnd, "Bearer Mode Unavailable.", "", MB_OK);
  573.        break;
  574.  
  575.     case LINEERR_CALLUNAVAIL:
  576.        MessageBox (hWnd, "Call appearances in use..", "", MB_OK);
  577.        break;
  578.  
  579.     case LINEERR_INUSE:
  580.        MessageBox (hWnd, "Line in Use.", "", MB_OK);
  581.        break;
  582.     
  583.     case LINEERR_INVALADDRESS:
  584.        MessageBox (hWnd, "Invalid Address.", "", MB_OK);
  585.        break;
  586.  
  587.     case LINEERR_INVALADDRESSID:
  588.        MessageBox (hWnd, "Invalid Address ID.", "", MB_OK);
  589.        break;
  590.  
  591.     case LINEERR_INVALCALLPARAMS:
  592.        MessageBox (hWnd, "Invalid Address ID.", "", MB_OK);
  593.        break;
  594.      
  595.     case LINEERR_INCOMPATIBLEEXTVERSION:
  596.        MessageBox (hWnd, "Incompatible extension version.","", MB_OK);
  597.        break;
  598.     case LINEERR_NOMEM:
  599.        MessageBox (hWnd, "No memory","", MB_OK);
  600.        break;
  601.     case LINEERR_NODRIVER:
  602.        MessageBox (hWnd, "No driver loaded", "", MB_OK);
  603.        break;
  604.     case LINEERR_RESOURCEUNAVAIL:
  605.        MessageBox (hWnd, "Resource overcommittment", "", MB_OK);
  606.        break;
  607.     case LINEERR_INVALPRIVSELECT:
  608.        MessageBox (hWnd, "Requested invalid priviledges", "", MB_OK);
  609.        break;
  610.     case LINEERR_INVALMEDIAMODE:
  611.        MessageBox (hWnd, "Requested invalid media mode", "", MB_OK);
  612.        break;
  613.     case LINEERR_LINEMAPPERFAILED:
  614.        MessageBox (hWnd, "Line mapper failed", "", MB_OK);
  615.        break;
  616.     case LINEERR_INVALPOINTER:
  617.        MessageBox (hWnd, "The specified pointer parameter is invalid.",
  618.                    "", MB_OK);
  619.        break;
  620.     case LINEERR_OPERATIONFAILED:
  621.        MessageBox (hWnd, "Operation failed.", "", MB_OK);
  622.        break;
  623.     case LINEERR_INVALLINEHANDLE:
  624.        MessageBox (hWnd, "Invalid line handle", "", MB_OK);
  625.        break;
  626.     case LINEERR_INVALCALLHANDLE:
  627.        MessageBox (hWnd, "Invalid call handle", "", MB_OK);
  628.        break;
  629.     case LINEERR_INVALCALLSELECT:
  630.        MessageBox (hWnd, "Invalid call selection", "", MB_OK);
  631.        break;
  632.     case LINEERR_NODEVICE:
  633.        MessageBox (hWnd, "No associated device for given class",
  634.                    "", MB_OK);
  635.        break;
  636.     case LINEERR_OPERATIONUNAVAIL:
  637.        MessageBox (hWnd, "The operation is unavailable",
  638.                    "", MB_OK);
  639.        break;
  640.     case LINEERR_INVALPARAM:
  641.         MessageBox(hWnd, "Invalid Paramater", "", MB_OK);
  642.        break; 
  643.  
  644.     case LINEERR_TARGETNOTFOUND:
  645.         MessageBox(hWnd, "Target Not Found", "", MB_OK);
  646.        break; 
  647.  
  648.    case LINEERR_NOREQUEST:
  649.       MessageBox(hWnd, "No outstanding Assisted Telephony requests.", "", MB_OK);
  650.        break; 
  651.    }
  652. }
  653.  
  654. LRESULT CALLBACK About( HWND hDlg,           
  655.                         UINT message,        
  656.                         WPARAM wParam,       
  657.                         LPARAM lParam)
  658. {
  659.    switch (message) 
  660.    {
  661.        case WM_INITDIALOG: 
  662.                return (TRUE);
  663.  
  664.        case WM_COMMAND:                              
  665.                if (   LOWORD(wParam) == IDOK         
  666.                    || LOWORD(wParam) == IDCANCEL)    
  667.                {
  668.                        EndDialog(hDlg, TRUE);        
  669.                        return (TRUE);
  670.                }
  671.                break;
  672.    }
  673.  
  674.    return (FALSE); 
  675. }
  676.  
  677.  
  678.  
  679.