private void ResetDwmBlurBehind() { if (DwmApi.DwmIsCompositionEnabled()) { DwmApi.DWM_BLURBEHIND bbhOff = new DwmApi.DWM_BLURBEHIND(); bbhOff.dwFlags = DwmApi.DWM_BLURBEHIND.DWM_BB_ENABLE | DwmApi.DWM_BLURBEHIND.DWM_BB_BLURREGION; bbhOff.fEnable = false; bbhOff.hRegionBlur = IntPtr.Zero; DwmApi.DwmEnableBlurBehindWindow(this.Handle, bbhOff); } }