Data types in visual basic 6.0

1. Numeric
Byte Store integer values in the range of 0 - 255
Integer Store integer values in the range of (-32,768) - (+ 32,767)
Long Store integer values in the range of (- 2,147,483,468) - (+ 2,147,483,468)
Single Store floating point value in the range of (-3.4x10-38) - (+ 3.4x1038)
Double Store large floating value which exceeding the single data type value
Currency store monetary values. It supports 4 digits to the right of decimal point and 15 digits to the left

2. String

Use to store alphanumeric values. A variable length string can store approximately 4 billion characters

3. Date

Use to store date and time values. A variable declared as date type can store both date and time values and it can store date values 01/01/0100 up to 12/31/9999

4. Boolean

Boolean data types hold either a true or false value. These are not stored as numeric values and cannot be used as such. Values are internally stored as -1 (True) and 0 (False) and any non-zero value is considered as true.

5. Variant

Stores any type of data and is the default Visual Basic data type. In Visual Basic if we declare a variable without any data type by default the data type is assigned as default.
source site: http://visualbasic.freetutes.c om/learn-vb6/lesson2.html

Answered by Nidhi Singh , an ibibo Master, at 5:14 PM on September 23, 2008

Following are VB data types..

• Boolean
The Boolean data type has only two states, True and False. These types of variables are stored as 16-bit (2 Byte) numbers, and are usually used for flags. For example, lets say that you have a textbox (Text1) and a command button (Command1). You only want Command1 to be Enabled when there is text in Text1. You would do something like this...
Private Sub Form_Load()
Command1.Enabled = False ' Disables Command1
Text1.Text = vbNullString ' Sets Text1=""
End Sub

Private Sub Text1_Change()
Dim bEnable As Boolean
If Text1.Text <> "" Then bEnable = True
Command1.Enabled = bEnable
End Sub


Run the program and Command1 will only be enabled when there is text typed into Text1.

• Byte
The Byte data type is an 8-bit variable which can store value from 0 to 255. This data type is very useful for storing binary data. It can also be very useful when sending/receiving byte values to/from a Basic Stamp or PIC.

• Double
The Double data type is a 64-bit floating point number used when high accuracy is needed. These variables can range from -1.79769313486232e308 to -4.94065645841247e-324 for negative values and from 4.94065645841247e-324 to 1.79769313486232e308 for positive values.

• Integer
The Integer data type is a 16-bit number which can range from -32768 to 32767. Integers should be used when you are working with values that can not contain fractional numbers.

• Long
The Long data type is a 32-bit number which can range from -2,147,483,648 to 2,147,483,647. Long variables can only contain non-fractional integer values. I myself use Long variables over Integers for increased performance. Most Win32 functions use this data type for this reason.

• Single
The Single data type is a 32-bit number ranging from -3.402823e38 to -1.401298e-45 for negative values and from 1.401298e-45 to 3.402823e38 for positive values. When you need fractional numbers within this range, this is the data type to use.

• String
The String data type is usually used as a variable-length type of variable. A variable-length string can contain up to approximately 2 billion characters. Each character has a value ranging from 0 to 255 based on the ASCII character set. Strings are used when Text is involved.

For more refer..
http://www.rentron.com/dat atypes.htm

Answered by Saq , an ibibo Master, at 6:32 PM on September 12, 2008

well pragya !
In Visual Basic 6 there are 11 different data types. These are Boolean, Byte, Currency, Date, Double, Integer, Long, Object, Single, String, and Variant. They each have a specific purpose and using them correctly will increase your programs performance. I am going to cover the data types most frequently used.

• Boolean
The Boolean data type has only two states, True and False. These types of variables are stored as 16-bit (2 Byte) numbers, and are usually used for flags. For example, lets say that you have a textbox (Text1) and a command button (Command1). You only want Command1 to be Enabled when there is text in Text1. You would do something like this...

Private Sub Form_Load()
Command1.Enabled = False ' Disables Command1
Text1.Text = vbNullString ' Sets Text1=""
End Sub

Private Sub Text1_Change()
Dim bEnable As Boolean
If Text1.Text <> "" Then bEnable = True
Command1.Enabled = bEnable
End Sub



Run the program and Command1 will only be enabled when there is text typed into Text1.

• Byte
The Byte data type is an 8-bit variable which can store value from 0 to 255. This data type is very useful for storing binary data. It can also be very useful when sending/receiving byte values to/from a Basic Stamp or PIC.

• Double
The Double data type is a 64-bit floating point number used when high accuracy is needed. These variables can range from -1.79769313486232e308 to -4.94065645841247e-324 for negative values and from 4.94065645841247e-324 to 1.79769313486232e308 for positive values.

• Integer
The Integer data type is a 16-bit number which can range from -32768 to 32767. Integers should be used when you are working with values that can not contain fractional numbers.

• Long
The Long data type is a 32-bit number which can range from -2,147,483,648 to 2,147,483,647. Long variables can only contain non-fractional integer values. I myself use Long variables over Integers for increased performance. Most Win32 functions use this data type for this reason.

• Single
The Single data type is a 32-bit number ranging from -3.402823e38 to -1.401298e-45 for negative values and from 1.401298e-45 to 3.402823e38 for positive values. When you need fractional numbers within this range, this is the data type to use.

• String
The String data type is usually used as a variable-length type of variable. A variable-length string can contain up to approximately 2 billion characters. Each character has a value ranging from 0 to 255 based on the ASCII character set. Strings are used when Text is involved.

Putting All Of This Technical Stuff To Use
Just to show you how to use these data types, here is a small example. Lets say that we have a String containing the text, "This VB stuff is pretty darn cool..!", and we want to convert each letter to it's ASCII equivalent. We will then display each letter along with its ASCII equivalent in a MessageBox one at a time.

Private Sub Command1_Click()
Dim sText As String
Dim lTextLength As Long
Dim sChar As String
Dim bASCII As Byte
Dim x As Long

sText = "This VB stuff is pretty darn cool..!"
lTextLength = Len(sText) 'Gets # of chars in sText

For x = 1 To lTextLength 'Loop through string one char at a time
sChar = Mid$(sText, x, 1)'Gets the x'th charcter in sText
bASCII = Asc(sChar) 'Gets ASCII value of character
MsgBox "The ASCII value of '" & sChar & "' is " & bASCII 'Display results
Next x

End Sub


Now run the code and it will display one character at a time along with it's ASCII value.

for more inf check http://www.rentron.com/datatypes.ht m

Answered by raj u , an ibibo Master, at 11:14 AM on September 12, 2008

The data type of a programming element refers to what kind of data it can hold and how it stores that data. Data types apply to all values that can be stored in computer memory or participate in the evaluation of an expression. Every variable, literal, constant, enumeration, property, procedure parameter, procedure argument, and procedure return value has a data type.
Declared Data Types

Unless you use typeless programming, you must declare data types for all your programming elements. (For more information, see Typeless Programming in Visual Basic.)

You define a programming element with a declaration statement, and you specify its data type with the As clause. The following table shows the statements you use to declare various elements.

Programming element Data type declaration

Variable


In a Dim Statement (Visual Basic)

Dim amount As Double

Static yourName As String

Public billsPaid As Decimal = 0

Literal


With a literal type character; see "Literal Type Characters" in Type Characters

Dim searchChar As Char = "." C

Constant


In a Const Statement (Visual Basic)

Const modulus As Single = 4.17825F

Enumeration


In an Enum Statement (Visual Basic)

Public Enum colors

Property


In a Property Statement

Property region() As String

Procedure parameter


In a Sub Statement (Visual Basic), Function Statement (Visual Basic), or Operator Statement

Sub addSale(ByVal amount As Double)

Procedure argument


In the calling code; each argument is a programming element that has already been declared, or an expression containing declared elements

subString = Left( inputString , 5 )

Procedure return value


In a Function Statement (Visual Basic) or Operator Statement

Function convert(ByVal b As Byte) As String

Answered by jaivir , an ibibo Master, at 2:54 PM on September 11, 2008

Data Types
In Visual Basic 6 there are 11 different data types. These are Boolean, Byte, Currency, Date, Double, Integer, Long, Object, Single, String, and Variant. They each have a specific purpose and using them correctly will increase your programs performance. I am going to cover the data types most frequently used.

• Boolean
The Boolean data type has only two states, True and False. These types of variables are stored as 16-bit (2 Byte) numbers, and are usually used for flags. For example, lets say that you have a textbox (Text1) and a command button (Command1). You only want Command1 to be Enabled when there is text in Text1. You would do something like this...

• Byte
The Byte data type is an 8-bit variable which can store value from 0 to 255. This data type is very useful for storing binary data. It can also be very useful when sending/receiving byte values to/from a Basic Stamp or PIC.

• Double
The Double data type is a 64-bit floating point number used when high accuracy is needed. These variables can range from -1.79769313486232e308 to -4.94065645841247e-324 for negative values and from 4.94065645841247e-324 to 1.79769313486232e308 for positive values.

• Integer
The Integer data type is a 16-bit number which can range from -32768 to 32767. Integers should be used when you are working with values that can not contain fractional numbers.

• Long
The Long data type is a 32-bit number which can range from -2,147,483,648 to 2,147,483,647. Long variables can only contain non-fractional integer values. I myself use Long variables over Integers for increased performance. Most Win32 functions use this data type for this reason.

• Single
The Single data type is a 32-bit number ranging from -3.402823e38 to -1.401298e-45 for negative values and from 1.401298e-45 to 3.402823e38 for positive values. When you need fractional numbers within this range, this is the data type to use.

• String
The String data type is usually used as a variable-length type of variable. A variable-length string can contain up to approximately 2 billion characters. Each character has a value ranging from 0 to 255 based on the ASCII character set. Strings are used when Text is involved.

Answered by Hem@nt .... , an ibibo Master, at 10:10 AM on September 11, 2008

WELL;
Data Types in Visual Basic

The data type of a programming element refers to what kind of data it can hold and how it stores that data. Data types apply to all values that can be stored in computer memory or participate in the evaluation of an expression. Every variable, literal, constant, enumeration, property, procedure parameter, procedure argument, and procedure return value has a data type.
Declared Data Types

Unless you use typeless programming, you must declare data types for all your programming elements. (For more information, see Typeless Programming in Visual Basic.)

You define a programming element with a declaration statement, and you specify its data type with the As clause. The following table shows the statements you use to declare various elements.
Programming element Data type declaration

Variable


In a Dim Statement (Visual Basic)

Dim amount As Double

Static yourName As String

Public billsPaid As Decimal = 0

Literal


With a literal type character; see "Literal Type Characters" in Type Characters

Dim searchChar As Char = "." C

Constant


In a Const Statement (Visual Basic)

Const modulus As Single = 4.17825F

Enumeration


In an Enum Statement (Visual Basic)

Public Enum colors

Property
In a Property Statement

Property region() As String

Procedure parameter


In a Sub Statement (Visual Basic), Function Statement (Visual Basic), or Operator Statement

Sub addSale(ByVal amount As Double)

Procedure argument
In the calling code; each argument is a programming element that has already been declared, or an expression containing declared elements
subString = Left( inputString , 5 )
Procedure return value
In a Function Statement (Visual Basic) or Operator Statement
Function convert(ByVal b As Byte) As String

Answered by Kishore , an ibibo Master, at 7:42 AM on September 11, 2008

The data type of a programming element refers to what kind of data it can hold and how it stores that data.

Data types apply to all values that can be stored in computer memory or participate in the evaluation of an expression.

Every variable, literal, constant, enumeration, property, procedure parameter, procedure argument, and procedure return value has a data type.

Unless you use typeless programming, you must declare data types for all your programming elements.

For more information-
http://msdn.micr osoft.com/en-us/library/ffsdkt da(VS.80).aspx

Answered by Nagendra , an ibibo Master, at 6:03 AM on September 11, 2008

Well , In Visual Basic 6 there are 11 different data types. These are Boolean, Byte, Currency, Date, Double, Integer, Long, Object, Single, String, and Variant. They each have a specific purpose and using them correctly will increase your programs performance. I am going to cover the data types most frequently used.

• Boolean
The Boolean data type has only two states, True and False. These types of variables are stored as 16-bit (2 Byte) numbers, and are usually used for flags. For example, lets say that you have a textbox (Text1) and a command button (Command1). You only want Command1 to be Enabled when there is text in Text1. You would do something like this...
Private Sub Form_Load()
Command1.Enabled = False ' Disables Command1
Text1.Text = vbNullString ' Sets Text1=""
End Sub

Private Sub Text1_Change()
Dim bEnable As Boolean
If Text1.Text <> "" Then bEnable = True
Command1.Enabled = bEnable
End Sub


Run the program and Command1 will only be enabled when there is text typed into Text1.

• Byte
The Byte data type is an 8-bit variable which can store value from 0 to 255. This data type is very useful for storing binary data. It can also be very useful when sending/receiving byte values to/from a Basic Stamp or PIC.

• Double
The Double data type is a 64-bit floating point number used when high accuracy is needed. These variables can range from -1.79769313486232e308 to -4.94065645841247e-324 for negative values and from 4.94065645841247e-324 to 1.79769313486232e308 for positive values.

• Integer
The Integer data type is a 16-bit number which can range from -32768 to 32767. Integers should be used when you are working with values that can not contain fractional numbers.

• Long
The Long data type is a 32-bit number which can range from -2,147,483,648 to 2,147,483,647. Long variables can only contain non-fractional integer values. I myself use Long variables over Integers for increased performance. Most Win32 functions use this data type for this reason.

• Single
The Single data type is a 32-bit number ranging from -3.402823e38 to -1.401298e-45 for negative values and from 1.401298e-45 to 3.402823e38 for positive values. When you need fractional numbers within this range, this is the data type to use.

• String
The String data type is usually used as a variable-length type of variable. A variable-length string can contain up to approximately 2 billion characters. Each character has a value ranging from 0 to 255 based on the ASCII character set. Strings are used when Text is involved.

Putting All Of This Technical Stuff To Use
Just to show you how to use these data types, here is a small example. Lets say that we have a String containing the text, "This VB stuff is pretty darn cool..!", and we want to convert each letter to it's ASCII equivalent. We will then display each letter along with its ASCII equivalent in a MessageBox one at a time.Private Sub Command1_Click()
Dim sText As String
Dim lTextLength As Long
Dim sChar As String
Dim bASCII As Byte
Dim x As Long

sText = "This VB stuff is pretty darn cool..!"
lTextLength = Len(sText) 'Gets # of chars in sText

For x = 1 To lTextLength 'Loop through string one char at a time
sChar = Mid$(sText, x, 1)'Gets the x'th charcter in sText
bASCII = Asc(sChar) 'Gets ASCII value of character
MsgBox "The ASCII value of '" & sChar & "' is " & bASCII 'Display results
Next x

End Sub

For more details , Please visit the source site :

http://www.rentron.com/da tatypes.htm

Answered by Alok Gupta , an ibibo Guru, at 12:28 AM on September 11, 2008

hi,friend
Visual Basic classifies the information mentioned above into two major data types, they are the numeric data types and the non-numeric data types.

Answered by Nz , an ibibo Master, at 9:22 PM on September 10, 2008