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21 Controls
..
As
part of its graphical
Interface
, VB allows the programmer
To
build
simple
Interface
objects, such
As
textboxes, buttons
And
checklists
by simply drawing them
With
a mouse.
The objects are called controls. VB comes
With
20 built
-
In
(intrinsic)
controls. These 20 are part of the VB run
-
time files.
01 ADO
Data
Control acts
As
Interface
between database
And
other databound controls
02 Checkbox status
Is
checked
Or
Not
checked
03 ComboBox combination of a textbox
And
a listbox
04 Command Button press a button
To
execute a block of code
05 DirListBox DirList
/
DriveList
/
FileList work together
To
naviate folder
Structure
of Windows
06 DriveListBox DirList
/
DriveList
/
FileList work together
To
naviate folder
Structure
of Windows
07 FileListBox DirList
/
DriveList
/
FileList work together
To
naviate folder
Structure
of Windows
08 Frame Container
For
holding other controls
09 Horizontal Scroll Bar slider
For
adjusting values
10 Image displays a picture
11 Label displays text, edit
In
code only
12 Line simple graphics control
To
display a line of various formats
13 ListBox vertical list of text strings,
Each
accessible by code
14 OLE Container can use
To
add objects from other applications, such
As
an Excel worksheet
15
Option
Button only 1 of a group may be selected at a time
16 Picturebox displays a picture, text
/
graphics can be drawn
On
it,
17 Shape simple graphics control
To
display basic shapes (square, circle)
18 Textbox basic text entry, can be multiline, text can be highlighted
19 Timer creates an
Event
over a user
-
defined interval
20 Vertical Scroll Bar slider
For
adjusting values
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