can any one help me for embed a flash in master pages , asp.net

Build this as a custom control, set the filepath (without tildes ~ and remove any unnecessary slashes), and set the height and width to match the flash image as nearly as possible.  You can then put the control in the master page and use it to display swf files:

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Text;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.Design;

 

 

namespace PlayFlash

{

    [ToolboxData("<{0}:FlashControl runat=server>")]

    public class FlashControl : WebControl

    {

 

        #region "Declarations"

 

            private string mFilePath;

 

        #endregion

 

 

        #region "Properties"

 

            [Category("SWF Source File")]

            [Browsable(true)]

            [Description("Set path to SWF source file.")]

            [Editor(typeof(System.Web.UI.Design.UrlEditor), typeof(System.Drawing.Design.UITypeEditor))]

            public string FilePath

            {

                get

                {

                    return mFilePath;

                }

 

                set

                {

                    mFilePath = value;

                }

            }   // end FilePath property

 

        #endregion

 

 

       #region "Rendering"

 

        protected override void RenderContents(HtmlTextWriter writer)

        {

            try

            {

                if (FilePath.ToString() != string.Empty)

                {

                    StringBuilder sb = new StringBuilder();

                    sb.Append("");

 

                    writer.RenderBeginTag(HtmlTextWriterTag.Div);

                    writer.Write(sb.ToString());

                    writer.RenderEndTag();

                }

                else

                {

                    // if you want it say nothing, just blank out the message

                    writer.RenderBeginTag(HtmlTextWriterTag.Div);

                    writer.Write("");

                    writer.RenderEndTag();

                }

            }

            catch

            {

                // with no properties set, this will render "Custom Flash Control" in a

                // a box on the page

                writer.RenderBeginTag(HtmlTextWriterTag.Div);

                writer.Write("Custom Flash Control");

                writer.RenderEndTag();

            }  // end try-catch

        }   // end RenderContents

 

       #endregion

 

    }   // end class

}       // end namespace