Define procedures. Write step by step process to create a procedure using the Insert Procedure dialog box

Procedures: Visual Basic application is made up of small, self-contained segments. It will be made up of small segments called procedures. Procedures are useful for implementing repeated tasks, such as frequently used calculations.

                                                                                                           

Creating a Sub Procedure

To create sub routine, on the main menu, click Tools -> Add Procedure... In the Name edit box, type SquareArea Click OK Implement routines as follows: Public Sub SquareArea()     Dim dblSide As Double     Dim dblArea As Double         dblSide = Form1.txtSide     dblArea = dblSide * dblSide         Form1.txtArea.Text = dblArea End Sub Save all

Calling a Sub Procedure

1. Display the form
2. Double-click the bottom Calculate button and, in its body, type SquareArea
    

Private Sub cmdCalcArea_Click()     SquareArea End Sub

3. Text the application

Answer-22(b): In Visual Basic, the Form is the container for all the controls that make up the user interface. When a Visual Basic application is executing, each window it displays on the Desktop is a Form. The Form is the top-level object in a Visual Basic application, and every application starts with the Form.

 

The Appearance of Forms: The main characteristic of a Form is the title bar on which the form’s caption is displayed. On the left end of the title bar is the Control Menu icon. Clicking this icon opens the Control menu. On the right side of the title bar are three buttons: Minimize, Maximize, and Close. Clicking these buttons performs the associated function.

You can customize the appearance of the Form with the following Form properties:

•  MinButton, MaxButton These two properties are True by default. Set them to False to hide the corresponding buttons on the title bar.

•  ControlMenu This property is also True by default. Set it to False to hide the icon and disable the Control menu. Although the Control menu is rarely used, Windows applications don’t disable it.
When the ControlMenu property is False, the three buttons on the title bar are also disabled. If you set the Caption property to an empty string, the title bar disappears altogether.

•  BorderStyle The BorderStyle property determines the style of the Form’s border and the appearance of the Form.

VALUE	CONSTANT		DESCRIPTION
0–None	vbBSNone	Form has no border and can’t be resized; this setting should be avoided
1–Fixed Single	vbFixedSingle	Form has a visible border, but can’t be resized
2–Sizable	vbSizable	Border and a title bar and can be repositioned on the Desktop and resized
3–Fixed Dialog	vbFixedDialog	Fixed dialog box
4–Fixed ToolWindow	vbFixedToolWindow	Form has a Close button only and can’t be resized; looks like a toolbar
5–Sizable ToolWindow	vbSizableToolWindow	Same as the Fixed ToolWindow, but can be resized

Loading and Unloading Forms: To load and unload Forms, use the Load and Unload statements. The Load statement has the following syntax:   Load formName

and the Unload statement has this syntax:                 Unload formName

Showing Forms: To show a Form, you use the Show method. If the Form is loaded but invisible, the Show method brings the specified Form on top of every other window on the Desktop. If the Form isn’t loaded, the Show method loads it and then displays it. The Show method has the following syntax:               formName.Show mode

The formName variable is the Form’s name, and the optional argument mode determines whether the Form will be modal or modeless. It can have one of the following values:

•  0–Modeless (default)

•  1–Modal

Modeless Forms are the norm. They interact with the user, and they allow the user to switch to any other Form of the application. If you don’t specify the optional mode argument, the Show method displays the Form as modeless.

A modal Form takes total control of the application and won’t let the applications proceed unless the Form is closed. A modal Form, therefore, must have a Close button or some means for the user to close it so that they can return to the Form from which the modal Form was loaded

Hiding Forms: If your application uses many Forms, you may want to hide some of them to make room on the Desktop for others. To hide a Form, use the Form’s Hide method, whose syntax is:                        Form.Hide

Go to visual Basic theory index