Class 6 : Introduction to Visual Basic 2010

Descriptive Type Questions :

1. What is Visual Basic ?
   Ans. Visual Basic is an event driven programming language. An event refers to user’s action such as key press , mouse click , mouse movement etc. It means that the programmer will decide and write program about what the program will do when the user clicks on a button , enters text in a textbox etc.
2. Name any four components of the Visual Basic IDE screen and their uses.
   Ans. * Form Window – It is the primary work area of the application.
   • Toolbox – It contains all the controls.
   • Solution Explorer – It displays a list of all the forms in the current project.
   • Properties Window – It shows the properties of Forms and Controls.
3. What is the use of DIM statement in VB ?
   Ans. DIM statement is used to tell VB compiler about the type of value that is going to be stored in a variable.
   For eg : DIM a as integer.
   This statement informs that a is a variable in memory that can store only integer values and cannot accept string or decimal values.
4. What is the purpose of Val function ?
   Ans. Val function is used to return numbers that is entered as a string in a textbox to perform calculations.
   For eg: Val(textbox1.text)
   Returns the number that is entered in textbox1. If any text is entered it returns 0.
5. Name some common controls used in VB 2010.
   Ans. Some common controls used in VB 2010 are :-
   i) Form ii) Button iii) Label iv) Textbox v) Listbox
   vi) Combobox vii) Radio button viii) Checkbox ix) Picture box
   x) DateTime Picker.