{ Взято с _http://delphiworld.narod.ru }
{Переключение консольного приложения в полный экран }

{  
   There is no documented way to make a console application fullscreen.  
   The following code works for both NT and Win9x.  
   For win NT I used the undocumented SetConsoleDisplayMode and  
   GetConsoleDisplayMode functions.  
}  

Uses Windows, SysUtils;

{  
 function GetConsoleDisplayMode(var lpdwMode: DWORD): BOOL; stdcall;  
   external 'kernel32.dll';  
  // lpdwMode: address of variable for current value of display mode  
}  

function NT_GetConsoleDisplayMode(var lpdwMode: DWORD): Boolean;  
type  
  TGetConsoleDisplayMode = function(var lpdwMode: DWORD): BOOL;  
  stdcall;  
var  
  hKernel: THandle;  
  GetConsoleDisplayMode: TGetConsoleDisplayMode;  
begin  
  Result := False;  
  hKernel := GetModuleHandle('kernel32.dll');  
  if (hKernel > 0) then  
  begin @GetConsoleDisplayMode :=  
      GetProcAddress(hKernel, 'GetConsoleDisplayMode');  
    if Assigned(GetConsoleDisplayMode) then  
    begin  
      Result := GetConsoleDisplayMode(lpdwMode);  
    end;  
  end;  
end;  

{
  function SetConsoleDisplayMode(hOut: THandle; // standard output handle  
  dwNewMode: DWORD;         // specifies the display mode  
  var lpdwOldMode: DWORD    // address of variable for previous value of display mode  
  ): BOOL; stdcall; external 'kernel32.dll';  
}  

function NT_SetConsoleDisplayMode(hOut: THandle; dwNewMode: DWORD;  
  var lpdwOldMode: DWORD): Boolean;  
type  
  TSetConsoleDisplayMode = function(hOut: THandle; dwNewMode: DWORD;  
  var lpdwOldMode: DWORD): BOOL;  
  stdcall;  
var  
  hKernel: THandle;  
  SetConsoleDisplayMode: TSetConsoleDisplayMode;  
begin  
  Result := False;  
  hKernel := GetModuleHandle('kernel32.dll');  
  if (hKernel > 0) then  
  begin @SetConsoleDisplayMode :=  
      GetProcAddress(hKernel, 'SetConsoleDisplayMode');
    if Assigned(SetConsoleDisplayMode) then  
    begin  
      Result := SetConsoleDisplayMode(hOut, dwNewMode, lpdwOldMode);  
    end;  
  end;  
end;  

function GetConsoleWindow: THandle;  
var  
  S: AnsiString;  
  C: Char;  
begin  
  Result := 0;  
  Setlength(S, MAX_PATH + 1);  
  if GetConsoleTitle(PChar(S), MAX_PATH) <> 0 then  
  begin  
    C := S[1];  
    S[1] := '$';  
    SetConsoleTitle(PChar(S));  
    Result := FindWindow(nil, PChar(S));  
    S[1] := C;
    SetConsoleTitle(PChar(S));  
  end;  
end;  

function SetConsoleFullScreen(bFullScreen: Boolean): Boolean;  
const  
  MAGIC_CONSOLE_TOGGLE = 57359;  
var  
  dwOldMode: DWORD;  
  dwNewMode: DWORD;  
  hOut: THandle;  
  hConsole: THandle;  
begin  
  if Win32Platform = VER_PLATFORM_WIN32_NT then
  begin
    dwNewMode := Ord(bFullScreen);  
    NT_GetConsoleDisplayMode(dwOldMode);  
    hOut := GetStdHandle(STD_OUTPUT_HANDLE);  
    Result := NT_SetConsoleDisplayMode(hOut, dwNewMode, dwOldMode);  
  end  
  else  
  begin  
    hConsole := GetConsoleWindow;  
    Result := hConsole <> 0;  
    if Result then  
    begin  
      if bFullScreen then  
      begin  
        SendMessage(GetConsoleWindow, WM_COMMAND, MAGIC_CONSOLE_TOGGLE, 0);  
      end  
      else  
      begin  
        // Better solution than keybd_event under Win9X ?  
        keybd_event(VK_MENU, MapVirtualKey(VK_MENU, 0), 0, 0);  
        keybd_event(VK_RETURN, MapVirtualKey(VK_RETURN, 0), 0, 0);
        keybd_event(VK_RETURN, MapVirtualKey(VK_RETURN, 0), KEYEVENTF_KEYUP, 0);  
        keybd_event(VK_MENU, MapVirtualKey(VK_MENU, 0), KEYEVENTF_KEYUP, 0);  
      end;  
    end;  
  end;  
end;  

{procedure TForm1.Button1Click(Sender: TObject);  }
var  
  s: string;  
begin  
  AllocConsole;  
  try  
    SetConsoleFullScreen(True);  
    Write('Hi, you are in full screen mode now. Type something [Return]: ');  
    Readln(s);  
    SetConsoleFullScreen(False);  
    // ShowMessage(Format('You typed: "%s"', [s]));  
  finally  
    FreeConsole;  
  end;

end.