How to set ToolTip to active in C#?

In Windows Forms, the ToolTip represents a tiny pop-up box which appears when you place your pointer or cursor on the control and the purpose of this control is it provides a brief description about the control present in the windows form. In ToolTip, you can check the ToolTip is active or not by using Active Property.
The default value of this property is True. When the Active property is set to true which means the ToolTip box will pop-up on the screen and when the Active property is set to false which means the ToolTip box does not pop-up on the screen. You can set this property in two different ways:

1. Design-Time: It is the easiest way to set the value of the Active property as shown in the following steps:

• Step 1: Create a windows form as shown in the below image:
  Visual Studio -> File -> New -> Project -> WindowsFormApp
  
• Step 2: Drag the ToolTip from the ToolBox and drop it on the form. When you drag and drop this ToolTip on the form it will automatically add on the properties(named as ToolTip on ToolTip1) of every controls present in the current windows from.

  

• Step 3: After drag and drop you will go to the properties of the ToolTip and set the value of the Active property.
  

  Output:
  

2. Run-Time: It is a little bit trickier than the above method. In this method, you can set the Active property of ToolTip programmatically with the help of given syntax:

public bool Active { get; set; }

Here, the value of this property is of System.Boolean type. So, to activate the ToolTip set the value of this property to true. Otherwise, false. The following steps show how to set the Active property of the ToolTip dynamically:

• Step 1: Create a ToolTip using the ToolTip() constructor is provided by the ToolTip class.

  // Creating a ToolTip
  ToolTip t = new ToolTip();
  

• Step 2: After creating Tooltip, set the Active property of the Tooltip provided by the ToolTip class.

  // Setting the Active property
  t.Active = true;
  

• Step 3: And last add this ToolTip to the controls using SetToolTip() method. This method contains the control name and the text which you want to display in the ToolTip box.

  t.SetToolTip(box1, "Name should be start with Capital letters");

  Example:

  using System;
  using System.Collections.Generic;
  using System.ComponentModel;
  using System.Data;
  using System.Drawing;
  using System.Linq;
  using System.Text;
  using System.Threading.Tasks;
  using System.Windows.Forms;
  
  namespace WindowsFormsApp33 {
  
  public partial class Form1 : Form {
  
      public Form1()
      {
          InitializeComponent();
      }
  
      private void Form1_Load(object sender, EventArgs e)
      {
          // Creating and setting the
          // properties of the Label
          Label l1 = new Label();
          l1.Location = new Point(140, 122);
          l1.Text = "Name";
  
          // Adding this Label control to the form
          this.Controls.Add(l1);
  
          // Creating and setting the
          // properties of the TextBox
          TextBox box1 = new TextBox();
          box1.Location = new Point(248, 119);
          box1.BorderStyle = BorderStyle.FixedSingle;
  
          // Adding this TextBox
          // control to the form
          this.Controls.Add(box1);
  
          // Creating and setting the
          // properties of the Label
          Label l2 = new Label();
          l2.Location = new Point(140, 152);
          l2.Text = "Password";
  
          // Adding this Label control to the form
          this.Controls.Add(l2);
  
          // Creating and setting the
          // properties of the TextBox
          TextBox box2 = new TextBox();
          box2.Location = new Point(248, 145);
          box2.BorderStyle = BorderStyle.FixedSingle;
  
          // Adding this TextBox
          // control to the form
          this.Controls.Add(box2);
  
          // Creating and setting the
          // properties of the ToolTip
          ToolTip t = new ToolTip();
          t.Active = true;
          t.SetToolTip(box1, "Name should be start with Capital letters");
          t.SetToolTip(box2, "Password should be greater than 8 words");
      }
  }
  }

  Output: