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The Message Box

• One of the best functions in Visual Basic is the message box.
The message box displays a message, optional icon, and
selected set of command buttons. The user responds by
clicking a button.
• The statement form of the message box returns no value (it
simply displays the box):

MsgBox Message, Type, Title

Message Text message to be displayed
Type Type of message box (discussed in a bit)
Title Text in title bar of message box
You have no control over where the message box appears on
the screen.
• The function form of the message box
returns an integer value (corresponding to
the button clicked by the user). Example of
use (Response is returned value):
• Dim Response as Integer
• Response = MsgBox(Message, Type, Title)
• The Type argument is formed by summing
four values corresponding to the buttons to
display, any icon to show, which button is the
default response, and the modality of the
message box.
• The first component of the Type value specifies the buttons to display:
• Value Meaning Symbolic Constant
• 0 OK button only vbOKOnly
• 1 OK/Cancel buttons vbOKCancel
• 2 Abort/Retry/Ignore buttons vbAbortRetryIgnore
• 3 Yes/No/Cancel buttons vbYesNoCancel
• 4 Yes/No buttons vbYesNo
• 5 Retry/Cancel buttons vbRetryCancel
• The second component of Type specifies the icon to display in the message box:
• Value Meaning Symbolic Constant
• 0 No icon (None)
• 16 Critical icon vbCritical
• 32 Question mark vbQuestion
• 48 Exclamation point vbExclamation
• 64 Information icon vbInformation
• · The third component of Type specifies which button is default (i.e. pressing Enter is the same
as clicking the default button):
• Value Meaning Symbolic Constant
• 0 First button default vbDefaultButton1
• 256 Second button default vbDefaultButton2
• 512 Third button default vbDefaultButton3
• · The fourth and final component of Type specifies the modality:
• Value Meaning Symbolic Constant
• 0 Application modal vbApplicationModal
• 4096 System modal vbSystemModal
• If the box is Application Modal, the user must respond to the box before continuing work in the current
application. If the box is System Modal, all applications are suspended until the user responds to the
message box.
• Note for each option in Type, there are numeric values
listed and symbolic constants. Recall, it is strongly
suggested that the symbolic constants be used instead of
the numeric values. You should agree that vbOKOnly
means more than the number 0 when selecting the button
• The value returned by the function form of the message box
is related to the button clicked:
• Value Meaning Symbolic Constant
• 1 OK button selected vbOK
• 2 Cancel button selected vbCancel
• 3 Abort button selected vbAbort
• 4 Retry button selected vbRetry
• 5 Ignore button selected vbIgnore
• 6 Yes button selected vbYes
• 7 No button selected vbNo
MsgBox “This is an example of a message box”,
vbOKCancel + vbInformation, “Message Box

• You've seen message boxes if you've ever used a
Windows application. Think of all the examples
you've seen. For example, message boxes are
used to ask you if you wish to save a file before
exiting and to warn you if a disk drive is not ready.
InputBox function
• The InputBox function displays a dialog
box, where the user can write some input
and/or click on a button. If the user clicks
the OK button or presses ENTER on the
keyboard, the InputBox function will return
the text in the text box. If the user clicks on
the Cancel button, the function will return
an empty string ("").
• Prompt: Required. The message to show in the dialog box. Maximum length is
1024 characters. You can separate the lines using a carriage return character
(Chr(13)), a linefeed character (Chr(10)), or carriage return–linefeed character
combination (Chr(13) & Chr(10)) between each line
• Title: Optional. The title of the dialog box. Default is the application name.
• Default: Optional. A default text in the text box
• Xpos: Optional. The horizontal distance of the left edge of the dialog box from
the left edge of the screen. If omitted, the dialog box is horizontally centered.
• Ypos: Optional. The vertical distance of the upper edge of the dialog box from
the top of the screen. If omitted, the dialog box is vertically positioned one-third
of the way down the screen.
• Helpfile: Optional. The name of a Help file to use. Must be used with the
context parameter.
• Context: Optional. The Help context number to the Help topic. Must be used
with the helpfile parameter
• Example
dim fname as string
fname=InputBox("Enter your name:")
MsgBox("Your name is " & fname)