Page 93 - TCS ICT Book 8

The City School 2021-2022

Follow the steps to create a program in which we will detect the MouseHover
event in VS. In the following example, we are going to display a pop-up window

containing a message, whenever the mouse hovers on the button inside our
program’s form.

1. Create a new form only with one Developing Applications

button.
2. Double click on the button to open

the script menu and then open the
general tab on the top of the current

script window as shown in the example.
3. Select (Form1 Events).

4. Then open the declaration window right
next to it to select the MouseEvent by

scrolling down which is MouseHover in this case. After selecting the MouseHover
option from the declaration window, additional code will automatically be added. In

that part, we will add a predefined feature MsgBox().
5. Next, we will declare a string value to display in parenthesis of this MsgBox(“this

popup window appears whenever the mouse hovers on this button”)
6. Execute the program by pressing the debugging button to test the program.

4.12. Functions and Subroutines

Function is a type of procedure that returns a value that is passed on to the main
procedure to finish execution. A function is similar to a subprocedure but there is one

major difference, a function returns a value whilst a subprocedure does not.
In Visual Basic 2010, there are two types of functions:

• the built-in functions
• user-defined functions-functions created by programmers

Creating user-defined functions

To create a user-defined function in Visual Basic 2010, you can use the following
syntaxes:

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