Key Points - Visual Basic Revision

Intrinsic Controls in Visual basic
The visual basic 6.0 provides some standard controls on its control box which are known as intrinsic control. These are built-in controls and are contained in Visual basic .EXE file. These are different from the extrinsic controls (ActiveX objects and Insertable objects) in the sense that they always reside in the control toolbox, while the others are required to be inserted through the components.

TOOL BOX
The following table is describing the basic controls, their functionality, naming conventions and some important properties and commonly used methods. The letters in ITALICS show the methods generally used with these properties.
Describing the intrinsic control

S.no - Control

1. PictureBox
Naming convention
Pic

2. Label
Lbl

3. Textbox
Txt

4. Frame
Fra

5. Command
Button
Cmd
Important properties
Functionality
Borderstyle, picture, autosize
LoadPicture()
Alignment, wordwrap, autosize, borderstyle
Text, max length, multiline, scrollbar, password character, seltext, selstart
Visible, borderstyle, appearance
Enabled, font, style, top visible.
Displays a graphic from a bitmap, icon or metafile.
Displays text that a user can't change directly.
Displays information entered at design time by the user, or in code at run time.
Provides an identifiable grouping for controls.
Looks like a push button and is used to begin, interrupt, or end a process.

6. Checkbox
Chk
Alignment, enabled, value

7. Opt

8. OptionButt on
ComboBox
Cbo

9. List Box
Lst
Alignment, enabled, value, style
Appearance, borderstyle, visible.
Multiselect , sorted, style
AddItem(),
RemoveItem(),Clear(), list()
Min, max, Value,
LargeChange, smallChange
Min, max, Value,
LargeChange, smallChange
Enabled, interval, index
Timer() drive

- HScrollbar hsb
- VScrollbar vsb
- Timer tmr
- DriveListB drv ox
- DirListBox dir
- FileListBox fil
- Shape shp path

Path, pattern

Only for decorative purpose on Form Shape, bordercolor, fillcolor
1.. Line lin
Only for decorative purpose on
Form
Shape, bordercolor, fillcolor, borderstyle, borderwidth
1.. Image img
Appearance, borderstyle, picture, stretch
LoadPicture()
1.. Data dat
DatabaseName, recordsource, Readonly, exclusive
2.. OLE ole
Class. Sourcedoc,
Sourceitem,

OLETypeAllowed
Name, Caption (or text in case of textbox), font, are common to the controls basic properties.
Displays an X when selected; the X disappears when the Checkbox is cleared.
Displays an option that can be turned on or off.
Combines the features of a TextBox control and a ListBox control.
Displays a list of items from which the user can select one or more.
Provides a horizontal scroll bar for easy navigation through long lists of items.
Provides a vertical scroll bar.
A control which can execute code at regular intervals by causing a Timer event.
Enables a user to select a valid disk drive at run time.
Displays directories and paths at run time.
Locates and lists files in the directory specified by the Path property at run time.
A graphical control displayed as a rectangle, square, oval, circle or rounded rectangle or square.
A graphical control displayed as a horizontal, vertical or diagonal line.
Displays a graphic.
Provides access to databases using a
Recordset object.
Enables you to add insertable objects to the forms of your applications. properties of all controls which are related

How to use the properties within a particular control:
Syantax: Controlname.property=value
Ex:- txtcountry.text=”India” here the txtcountry is a text box assigned a value of “India” to its property text.

How to use the properties within a particular control:
Syantax: Controlname.method(parameters)
Ex:- lstname.additem(“my name”) the method additem is here adding a new item in the listbox.
The codes using these properties and/or methods are generally written either within a function, procedure or an event-procedure while writing a VB 6.0 programs.