Computer Programming Concepts and Visual Basic David I. Schneider

424 Computer Programming Concepts and Visual Basic
AUTOREDRAW The AutoRedraw property determines what happens to graphics and Printed
material on a form or picture box after another object (for example, another picture box) or
program temporarily obscures part of the form or picture box. If AutoRedraw is True, then
Visual Basic will restore the graphics and Printed material from a copy that it has saved in memory.
If AutoRedraw is False, then Visual Basic does not keep track of graphics and Printed
material that have been obscured, but it does invoke the Paint event of the form or picture box
when the obstruction is removed. Thus, only graphics and Printed material generated by the
Paint event will be restored when AutoRedraw is False.
AUTOSIZE If the AutoSize property of a label or picture box is True, Visual Basic automatically
sets the width and height of the label so that the entire caption can be accommodated.
If the AutoSize property is False, the size of the label is not adjusted by Visual Basic,
and captions are clipped if they do not fit.
BACKCOLOR The BackColor property determines the background color of an object. For
a command button, the background color is only valid when the style property is set to “1-
Graphical.” (Such a command button can display a picture.) If the BackColor of a form or
picture box is changed while a program is running, all graphics and Printed text directly on
the form or picture box are erased. [color]
BACKSTYLE The BackStyle property of a label or shape is opaque (1) by default. The rectangular,
square, circular, or oval region associated with the control is filled with the control’s
background color and possibly caption. If the BackStyle is set to transparent (0),
whatever is behind the control remains visible; the background color of the control essentially
becomes “see through.”
BEEP The statement Beep produces a sound of frequency 800 Hz that lasts a fraction of a
second.
BOF When the BOF property of a data control is True, the current record position in the file
is before the first record.
BOOLEAN A variable of type Boolean requires 2 bytes of memory and holds either the
value True or False. If boolVar is a Boolean variable, then the statement Print boolVar displays
True when the value is True and displays False when the value is False.
BORDERCOLOR The BorderColor property determines the color of a line or shape control.
[color]
BORDERSTYLE The BorderStyle property determines the border style for a form [0-none,
1-fixed single, 2-sizeable (default), 3-fixed double, 4-Fixed ToolWindow, 5-Sizable Tool-
Window], line or shape [0-transparent, 1-solid, 2-dash, 3-dot, 4-dash-dot, 5-dash-dot-dot, 6inside
solid], grid image, label, picture box, and text box [0-none, 1-fixed single (default)].
You cannot change the borders of forms and text boxes during run time.
BORDERWIDTH The BorderWidth property (with settings from 1 through 8192) determines
the thickness of a line or shape control.
BYTE A variable of type Byte uses a single byte of memory and holds a value from 0 to
255.
CALL A statement of the form Call ProcedureName(argList) is used to execute the named
Sub procedure, passing to it the variables and values in the list of arguments. Arrays appearing
in the list of arguments should be specified by the array name followed by empty parentheses.
The value of a variable argument may be altered by the Sub procedure unless the
variable is surrounded by parentheses. After the statements in the Sub procedure have been
executed, program execution continues with the statement following Call. Note: The keyword
Call may be omitted. In this case, the parentheses are omitted and the statement is written
ProcedureName argList.