Олег Кулабухов приводит следующий код:
var hCommFile : THandle; 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; |
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