C#

foreach (DataTable table in dsDataSet.Tables)
  foreach (DataRow row in table.Rows)
    foreach (DataColumn column in table.Columns)
      ... (Your code here) ...

John Simmons / outlaw programmer wrote:

When I hover the mouse over a menu item, no tooltip shows up.

namespace WindowsFormsApplication4 {
   partial class Form1 {
      /// <summary>
      /// Required designer variable.
      /// </summary>
      private System.ComponentModel.IContainer components = null;

      /// <summary>
      /// Clean up any resources being used.
      /// </summary>
      /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
      protected override void Dispose(bool disposing) {
         if (disposing && (components != null)) {
            components.Dispose();
         }
         base.Dispose(disposing);
      }

      #region Windows Form Designer generated code

      /// <summary>
      /// Required method for Designer support - do not modify
      /// the contents of this method with the code editor.
      /// </summary>
      private void InitializeComponent() {
         this.menuStrip1 = new System.Windows.Forms.MenuStrip();
         this.toolStripMenuItem1 = new System.Windows.Forms.ToolStripMenuItem();
         this.toolStripMenuItem2 = new System.Windows.Forms.ToolStripMenuItem();
         this.menuStrip1.SuspendLayout();
         this.SuspendLayout();
         // 
         // menuStrip1
         // 
         this.menuStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
            this.toolStripMenuItem1});
         this.menuStrip1.Location = new System.Drawing.Point(0, 0);
         this.menuStrip1.Name = "menuStrip1";
         this.menuStrip1.Size = new System.Drawing.Size(284, 24);
         this.menuStrip1.TabIndex = 0;
         this.menuStrip1.Text = "menuStrip1";
         // 
         // toolStripMenuItem1
         // 
         this.toolStripMenuItem1.AutoToolTip = true;
         this.toolStripMenuItem1.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] {
            this.toolStripMenuItem2});
         this.toolStripMenuItem1.Name = "toolStripMenuItem1";
         this.toolStripMenuItem1.Size = new System.Drawing.Size(125, 20);
         this.toolStripMenuItem1.Text = "toolStripMenuItem1";
         // 
         // toolStripMenuItem2
         // 
         this.toolStripMenuItem2.AutoToolTip = true;
         this.toolStripMenuItem2.Image = global::WindowsFormsApplication4.Properties.Resources._3_5_Disk_Drive;
         this.toolStripMenuItem2.Name = "toolStripMenuItem2";
         this.toolStripMenuItem2.Size = new System.Drawing.Size(152, 22);
         this.toolStripMenuItem2.ToolTipText = "I\'m tooltip";
         // 
         // Form1
         // 
         this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
         this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
         this.ClientSize = new System.Drawing.Size(284, 264);
         this.Controls.Add(this.menuStrip1);
         this.MainMenuStrip = this.menuStrip1;
         this.Name = "Form1";
         this.Text = "Form1";
         this.menuStrip1.ResumeLayout(false);
         this.menuStrip1.PerformLayout();
         this.ResumeLayout(false);
         this.PerformLayout();

      }

      #endregion

      private System.Windows.Forms.MenuStrip menuStrip1;
      private System.Windows.Forms.ToolStripMenuItem toolStripMenuItem1;
      private System.Windows.Forms.ToolStripMenuItem toolStripMenuItem2;
   }
}

Microsoft Visual Studio 2008
Version 9.0.30729.1 SP
Microsoft .NET Framework
Version 3.5 SP1
Edition: Professional

on Windows Vista SP1