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Types of Dialog Boxes in Windows Form C#

Windows provides the following type of dialog boxes:
1. Modal
2. System Modal
3. Modeless

Modal Dialog Box : A modal dialog box does not allow you to switch focus to another area of the application, which has invokes the dialog box. However, you can switch to other windows application while the modal dialog box is being displayed on the screen.
For example, the Save as dialog box of Microsoft word is a modal dialog box. If you are trying to save a word file by using the Save As dialog box, you cannot make any changes in the word document until it is saved. The following figure shows the save as dialog box.

Modal Dialog Box

System Modal Dialog Box
The System modal dialog box takes control of the entire Windows environment. For example, the Windows Log On dialog box is a system modal dialog box.
The following figure displays the Log On to Windows dialog box.
Sometimes, error messages are displayed by using a system modal dialog box. When such messages appear on the screen, the user is not allowed to switch to, or interact with, any other Windows application until the system modal dialog box is closed.

System Modal Dialog Box

Modeless Dialog Box

Types of Dialog Boxes in Windows Form C#

The modeless dialog box stays on the screen and is available for use at any time. For example, the Find and Replace dialog box of Microsoft Word is a modeless dialog box. This modeless dialog box allows you to switch to another area of the application, which has invoked the dialog box, or to another windows application.


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Binary Search Linear Search Works only on sorted items. such as  1,2,3,4,5,6  etc
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Memory representation of Linked List Data Structures in C Language

Memory representation of Linked List

             In memory the linked list is stored in scattered cells (locations).The memory for each node is allocated dynamically means as and when required. So the Linked List can increase as per the user wish and the size is not fixed, it can vary.

               Suppose first node of linked list is allocated with an address 1008. Its graphical representation looks like the figure shown below:

      Suppose next node is allocated at an address 506, so the list becomes,

  Suppose next node is allocated with an address with an address 10,s the list become,

The other way to represent the linked list is as shown below:

 In the above representation the data stored in the linked list is “INDIA”, the information part of each node contains one character. The external pointer root points to first node’s address 1005. The link part of the node containing information I contains 1007, the address of next node. The last node …