1,185
社区成员




var
OldX, OldY : integer;
procedure TForm1.PaintBox1MouseMove(Sender: TObject; Shift: TShiftState; X,
Y: Integer);
begin
with Self.PaintBox1.Canvas do begin
MoveTo(OldX,0);
LineTo(OldX,PaintBox1.Height);
MoveTo(0,OldY);
LineTo(PaintBox1.Width,OldY);
OldX := X;
OldY := Y;
MoveTo(X,0);
LineTo(X,PaintBox1.Height);
MoveTo(0,Y);
LineTo(PaintBox1.Width,Y);
end;
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
Self.PaintBox1.Canvas.Pen.Mode := pmNot;
Self.PaintBox1.Canvas.Brush.Style := bsClear;
end;