📄 screencanvas.pas
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unit ScreenCanvas;
interface
uses Windows, Graphics;
type
TScreenCanvas = class(TCanvas)
private
procedure FreeContext;
protected
procedure CreateHandle; override;
public
destructor Destroy; override;
end;
implementation
destructor TScreenCanvas.Destroy;
begin
FreeContext;
inherited Destroy;
end;
procedure TScreenCanvas.CreateHandle;
begin
Handle := GetDC(0);
end;
procedure TScreenCanvas.FreeContext;
begin
ReleaseDC(0, Handle);
Handle := 0;
end;
end.
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