function MyDial(FEntryName: String;
FPhoneNumber: String;
FCallbackNumber: String;
FUserName: String;
FPassword: String;
FDomain: String;
FHRasConn: THRasConn): Longint;
var
DialParams: TRasDialParams;
lpfPassword: LongBool;
begin
if FHRasConn > 0 then HangUp;
FillChar(DialParams, SizeOf(TRasDialParams), #0);
with DialParams do
begin
dwSize:=Sizeof(TRasDialParams);
StrPCopy(szEntryName, FEntryName);
end;
if FEntryName <> '' then
begin
Result := RasGetEntryDialParams(nil, DialParams, lpfPassWord);
if Result <> 0 then Exit;
end
else
with DialParams do
begin
dwSize := SizeOf(TRASDialParams);
szEntryName := '';
UniqueString(FPhoneNumber);
StrLCopy(szPhoneNumber, PChar(FPhoneNumber), RAS_MaxPhoneNumber);
UniqueString(FCallBackNumber);
UniqueString(FCallBackNumber);
StrLCopy(szCallbackNumber, PChar((FCallBackNumber)),
procedure TForm1.Button1Click(Sender: TObject);
var
PhoneNumber : string;
CommPort : string;
NumberWritten : LongInt;
begin
PhoneNumber := 'ATDT 1-555-555-1212' + #13 + #10;
CommPort := 'COM2';
{Open the comm port}
hCommFile := CreateFile(PChar(CommPort),
GENERIC_WRITE,
0,
nil,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
0);
if hCommFile=INVALID_HANDLE_VALUE then
begin
ShowMessage('Unable to open '+ CommPort);
exit;
end;
{Dial the phone}
NumberWritten:=0;
if WriteFile(hCommFile,
PChar(PhoneNumber)^,
Length(PhoneNumber),
NumberWritten,
nil) = false then begin
ShowMessage('Unable to write to ' + CommPort);
end;
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
{Close the port}
CloseHandle(hCommFile);
end;