System.Windows.Forms.ThemeWin32Classic.DrawTrackBar_Vertical C# (CSharp) Method

		private void DrawTrackBar_Vertical (Graphics dc, Rectangle clip_rectangle, TrackBar tb,
			ref Rectangle thumb_pos, ref Rectangle thumb_area,  Brush br_thumb,
			float ticks, int value_pos, bool mouse_value) {			

			Point toptick_startpoint = new Point ();
			Point bottomtick_startpoint = new Point ();
			Point channel_startpoint = new Point ();
			float pixel_len;
			float pixels_betweenticks;
			Rectangle area = tb.ClientRectangle;
			
			GetTrackBarDrawingInfo (tb, out pixels_betweenticks, out thumb_area, out thumb_pos, out channel_startpoint, out bottomtick_startpoint, out toptick_startpoint);

			#region Track
			TrackBarDrawVerticalTrack (dc, thumb_area, channel_startpoint, clip_rectangle);
			#endregion

			#region Thumb
			switch (tb.TickStyle) 	{
			case TickStyle.BottomRight:
			case TickStyle.None:
				thumb_pos.X = channel_startpoint.X - 8;
				TrackBarDrawVerticalThumbRight (dc, thumb_pos, br_thumb, clip_rectangle, tb);
				break;
			case TickStyle.TopLeft:
				thumb_pos.X = channel_startpoint.X - 10;
				TrackBarDrawVerticalThumbLeft (dc, thumb_pos, br_thumb, clip_rectangle, tb);
				break;
			default:
				thumb_pos.X = area.X + 10;
				TrackBarDrawVerticalThumb (dc, thumb_pos, br_thumb, clip_rectangle, tb);
				break;
			}
			#endregion

			pixel_len = thumb_area.Height - 11;
			pixels_betweenticks = pixel_len / ticks;
			
			thumb_area.X = thumb_pos.X;
			thumb_area.Y = channel_startpoint.Y;
			thumb_area.Width = thumb_pos.Height;

			#region Ticks
			if (pixels_betweenticks <= 0)
				return;
			if (tb.TickStyle == TickStyle.None)
				return;
			Region outside = new Region (area);
			outside.Exclude (thumb_area);			
			
			if (outside.IsVisible (clip_rectangle)) {
				ITrackBarTickPainter tick_painter = TrackBarGetVerticalTickPainter (dc);

				if ((tb.TickStyle & TickStyle.BottomRight) == TickStyle.BottomRight) {
					float x = area.X + bottomtick_startpoint.X;
					for (float inc = 0; inc < pixel_len + 1; inc += pixels_betweenticks) 	{
						float y = area.Y + bottomtick_startpoint.Y + inc;
						tick_painter.Paint (
							x, y,
							x + (inc == 0 || inc + pixels_betweenticks >= pixel_len + 1 ? 3 : 2), y);
					}
				}

				if ((tb.TickStyle & TickStyle.TopLeft) == TickStyle.TopLeft) {
					float x = area.X + toptick_startpoint.X; 
					for (float inc = 0; inc < (pixel_len + 1); inc += pixels_betweenticks) {					
						float y = area.Y + toptick_startpoint.Y + inc;
						tick_painter.Paint (
							x - (inc == 0 || inc + pixels_betweenticks >= pixel_len + 1 ? 3 : 2), y,
							x, y);
					}			
				}
			}
			
			outside.Dispose ();
			#endregion
		}