高亮edit

type

  TEditLight= class (TEdit)

  private

    FEditSel: Boolean;

    procedure WMNCPAINT(var msg: TMessage); message WM_NCPaint;

    procedure SetEditSel(Value: Boolean);

  published

    property EditSel: Boolean read FEditSel write SetEditSel default False;

  end;



procedure TEditLight.SetEditSel(Value: Boolean);

begin

  if self.FEditSel <> Value then

  begin

    self.FEditSel := Value;

    Self.Invalidate;

  end;

end;



procedure TEditLight.WMNCPAINT(var msg: TMessage);

var

  DC: HDC;

  BorderBrush: HBRUSH;

  R: TRect;

begin

  DC := GetWindowDC(Handle);

  try

    SetRect(R, 0, 0, Width, Height);

    if FEditSel then

    begin

      BorderBrush := CreateSolidBrush(RGB(123, 228, 255));

      FrameRect(DC, R, BorderBrush);  //绘制外部高亮边框

      DeleteObject(BorderBrush);

      InflateRect(R, -1, -1);

    end

    else

    begin

      InflateRect(R, -1, -1);

      BorderBrush := CreateSolidBrush(ColorToRGB(Color));

      FrameRect(DC, R, BorderBrush);  //未得焦点时,用本身的颜色填充内部线框

      DeleteObject(BorderBrush);

      InflateRect(R, 1, 1);

    end;

    BorderBrush := CreateSolidBrush(RGB(78, 160, 209));

    FrameRect(DC, R, BorderBrush);  //绘制默认的边线框

    DeleteObject(BorderBrush);

  finally

    ReleaseDC(Handle, DC);

  end;

end;