How to set the text 'horizontal alignment' in TextBox?

[xred]

Hi, I want to set the text 'vertical alignment and horizontal alignment' in TextBox,
but I can't find 'horizontal alignment', so I write some control by myself,
however, I find it not easy to draw the text on the screen! who could give me some
samples? What should I do to draw this control?

The below is my code, it's not hard to understand, if you have some idea, please reply....
Thanks....

using System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Windows.Forms;
using System.Windows.Forms.Design;
using System.Runtime.InteropServices;


namespace XQJ
{
	public class NumberEdit : System.Windows.Forms.TextBox
	{
		// GDI---------------------------------START
		public struct Rect
		{
			public int Left, Top, Right, Bottom;
			public Rect( Rectangle r )
			{
				this.Left = r.Left;
				this.Top = r.Top;
				this.Bottom = r.Bottom;
				this.Right = r.Right;
			}
		}

		public const int DT_LEFT		= 0x00000000;
		public const int DT_CENTER		= 0x00000001;
		public const int DT_RIGHT		= 0x00000002;
		public const int DT_VCENTER		= 0x00000004;
		public const int DT_BOTTOM		= 0x00000008;
		public const int DT_WORDBREAK	= 0x00000010;
		public const int DT_SINGLELINE	= 0x00000020;
		

		[DllImport("User32.dll", CharSet=CharSet.Unicode)]
		public static extern int DrawText( IntPtr hDC, string lpStr , int nCount, ref Rect lpRect, long uFormat );

		[DllImport("gdi32.dll")]
		public static extern int SetTextColor( IntPtr hDC, int crColor );

		[DllImport("gdi32.dll")]
		public static extern int SetBkColor( IntPtr hDC, int crColor );
		// GDI----------------------------------END

		private System.ComponentModel.Container components = null;
		private Color colorBorder = Color.DarkBlue;
		private Color colorBackground = Color.Red;
		private Color colorText	= Color.Black;
		private int	iBorderWidth = 1;
		private Font fontText = new Font("Tahoma", 10);
		private Rectangle rectText;

		protected static int WM_PAINT = 0x000F;

		public NumberEdit()
		{
			this.SetStyle( ControlStyles.UserPaint | ControlStyles.AllPaintingInWmPaint, true );
		}

		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if( components != null )
					components.Dispose();
			}
			base.Dispose( disposing );
		}

		protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
		{
			
			DrawBackground();
			DrawString( this.Text );
		}

		protected override void OnTextChanged( EventArgs e )
		{
			DrawString( this.Text );
		}


		private void DrawBorder()
		{
			Graphics dc = this.CreateGraphics();
			Pen pen = new Pen( colorBorder, iBorderWidth );
			
			Rectangle client = new Rectangle( this.ClientRectangle.Left, this.ClientRectangle.Top, this.ClientRectangle.Width-1, this.ClientRectangle.Height-1 );
			
			dc.FillRectangle( new SolidBrush( Color.White ), client );
			dc.DrawRectangle( pen, client );
		}

		private void DrawBackground()
		{
			Graphics dc = this.CreateGraphics();
			dc.FillRectangle( new SolidBrush( colorBackground ), this.ClientRectangle );
		}

		private void DrawString( string str )
		{
			Graphics dc = this.CreateGraphics();
			IntPtr hdc = dc.GetHdc();
			SetTextColor( hdc, ColorTranslator.ToWin32( Color.White ) );
			SetBkColor( hdc, ColorTranslator.ToWin32( Color.Blue ) );

			Rectangle rect;
			rect = new Rectangle( this.ClientRectangle.Left, (int)((this.ClientRectangle.Height - fontText.GetHeight())/2),
						this.ClientRectangle.Width - 1, this.ClientRectangle.Height - 1 );

			Rect _rect = new Rect( rect );

			int flags = DT_CENTER | DT_VCENTER | DT_BOTTOM;
			DrawText( hdc, str, str.Length, ref _rect, flags );
			dc.ReleaseHdc( hdc );
		}

		// WndProc
		protected override void WndProc( ref System.Windows.Forms.Message m )
		{
			if ( m.Msg == WM_PAINT ) 
			{
				Graphics dc = Graphics.FromHwnd( this.Handle );
				PaintEventArgs pe = new PaintEventArgs( dc, new Rectangle(0, 0, this.Width, this.Height) );
				OnPaint( pe );
			}

			base.WndProc( ref m );
		}
	}
}

[Athley]

Couldn't you use the built in DrawString method?

public class MyTextBox : TextBox
{
	public MyTextBox()
	{
		InitializeComponent();
		this.SetStyle(ControlStyles.UserPaint, true);
	}
	protected override void OnPaint(PaintEventArgs pe)
	{
		pe.Graphics.DrawString(this.Text, this.Font, Brushes.Black, new PointF(0, 0));
		base.OnPaint(pe);
	}
}

/Leyan

[xred]

Hi, Athley, the reason is that I want to draw some string 'vertical alignment' but
if I use built in DrawString, I can't calculate the string length if there are some unicodes
and ansi codes, do you have some ideas? :-)