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Clear the video screen.
Source position: videoh.inc line 132
procedure ClearScreen; |
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).
None.
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Initialize video driver. |
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Update physical screen with internal screen image. |
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.
lazarus-ccr.sourceforge.net |