[Overview][Constants][Types][Procedures and functions][Variables][Index] | Reference for unit 'video' (#rtl)

# ClearScreen

Clear the video screen.

## Declaration

Source position: videoh.inc line 132

`procedure ClearScreen;`

## Description

ClearScreen clears the entire screen, and calls UpdateScreen after that. This is done by writing spaces to all character cells of the video buffer in the default color (lightgray on black, color attribute \$07).

## Errors

None.

## See also

InitVideo |  | Initialize video driver.
UpdateScreen |  | Update physical screen with internal screen image.

## Example

    program testvideo;

    uses video,keyboard,vidutil;

    Var
      i : longint;
      k : TkeyEvent;

    begin
      InitVideo;
      InitKeyboard;
      For I:=1 to 10 do
        TextOut(i,i, 'Press any key to clear screen');
      UpdateScreen(false);
      K:=GetKeyEvent;
      ClearScreen;
      TextOut(1,1,'Cleared screen. Press any key to end');
      UpdateScreen(true);
      K:=GetKeyEvent;
      DoneKeyBoard;
      DoneVideo;
    end.