Variant subtypes, Visual Basic Programming

Assignment Help:

Beyond the simple string or numeric classifications, Variant can make added distinctions regarding the specific nature of numeric information. For instance, you can have numeric information which represents a date or a time. While used with other date or time data, the result is expressed as a time or date. You can also contain a rich variety of numeric information ranging from Boolean values to enormous floating-point numbers. These distinct categories of information which can be contained in a Variant are called subtypes. Mostly time, you can just put the type of data you desire in a Variant, & the Variant acts in a way that is most suitable for the data it contains.

The following table illustrates the subtypes of data that a Variant can contain.

Subtype

Description

EmptyVariant

Uninitialized. Value is 0 for numeric variables or a zero-length string

("") for string variables.

NullVariant

Intentionally have no valid data.

Boolean

Contains either True or False.

Byte

Contains integer in range 0 to 255.

Integer

Contains integer in range -32,768 to 32,767.

Currency

-922,337,203,685,477.5808 to 922,337,203,685,477.5807.

Long

Have integer in range -2,147,483,648 to 2,147,483,647.

Single

Have a single-precision, floating-point number in the range -

3.402823E38 to -1.401298E-45 for -ve values; 1.401298E-45 to

3.402823E38 for positive values.

Double

Have a double-precision, floating-point number in the range -

1.79769313486232E308 to -4.94065645841247E-324 for -ve values; 4.94065645841247E-324 to 1.79769313486232E308 for positive values.

Date

Have a number that represents a date between January 1, 100 to

December 31, 9999.

Time

Represents a time among 0:00:00 and 23:59:59

String

Have a variable-length string which can be up to approximately 2 billion characters in length.

Object

Have an object.

Error

Have an error number.

You can employ conversion functions to changed data from one subtype to another. Additionally, the VarType function returns information regarding how your data is stored within a Variant.


Related Discussions:- Variant subtypes

Error handling in vbscript, While a run-time error takes place, the propert...

While a run-time error takes place, the properties of the Err object are filled with information which uniquely identifies the error & information which can be used to handle it. I

Switch 2 images, I have a problem with Visual Basic: exchangeable 2 image...

I have a problem with Visual Basic: exchangeable 2 images of place I have 2 picturebox''s placed a button when I click on the button, the 2 pictures of this place change with e

Mdi application - types of project using visual c++, MDI Application: ...

MDI Application: The MDI application utilizes the main frame window as the work space in which the user can open more document frame windows.

Modeless dialog, MODELESS DIALOG The Dialog boxes are either modal or m...

MODELESS DIALOG The Dialog boxes are either modal or modeless. The modal dialog box should be closed (Unloaded or hidden) before you can continue the working with the rest of t

Mfc classes, THE MFC CLASSES The CDocument, CWinAppCFrameWnd and CView ...

THE MFC CLASSES The CDocument, CWinAppCFrameWnd and CView are derived from the CObject and they give the majority of the structure and functionality.

Illustration of mdi application using a project, ILLUSTRATION OF MDI APPLIC...

ILLUSTRATION OF MDI APPLICATION USING A PROJECT 1. Choose the MDI option while generating the project by using the Appwizard. 2. Add the WM_LBUTTONDOWN message for the view

Repeating a statement until a condition becomes true, You can employ until ...

You can employ until keyword in two ways to verify a condition in a Do...Loop statement. You can verify the condition before you enter the loop (as illustrated in the following Chk

Sub and function procedures in code, In your code A, Function has to always...

In your code A, Function has to always be used on the right side of a variable assignment or in an expression. For illustration: Temp = Celsius(fDegrees) or Msg Box "The C

Operator precedence - vbscript operators, While several operations take pla...

While several operations take place in an expression, each part is evaluated & resolved in a predetermined order called operator precedence. You can employ parentheses to override

What is the method of creating a new project in vb.sss, Visual Basic 1....

Visual Basic 1. What is the method of creating a new project in VB.SSS 2. Illustrate Code Editor Window and Solution Explorer. 3. Write a VB program to sort and display a

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd