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protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        ViewState["BackUrl"] = Request.UrlReferrer.ToString();
    }
}
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/// </summary>
protected void Button1_Click(object sender, EventArgs e)
{
    Response.Redirect(ViewState["BackUrl"].ToString());
}
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public struct POINTAPI
{
   public int x;
   public int y;
}
public static void GetWindowfromPoint(ref int hwnd,ref StringBuilder winText,ref StringBuilder clsName,ref StringBuilder pText)
{
  int parentHandle=0;
  int maxLen=128;
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using System.Data.SqlClient;
string sql = "server=.;uid=sa;pwd=;database=tablename;";
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using System.Data.OleDb;
string sql = "PROVIDER=Microsoft.Jet.OLEDB.4.0;DATA Source=" + HttpRuntime.AppDomainAppPath + "//App_Data//db.mdb";
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using System.IO;
using System.Drawing.Imaging;
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