Contents. Visual Basic for Applications Visual Basic for Applications is simplified impementation of Microsoft's programming language Visual Basic 6. VBA is used for automation operations in applications such as Microsoft Excel and also expands it's capabilities. You can find VBA in all Microsoft Office applications, AutoCAD, WordPerfect and many others. Visual Basic for Application appeared in Excel (Excel version 5) in 1994, earlier (up to version 4) only allow macros to automate those tasks that you can perform using the keyboard.
Now, in addition to recording macros you can also independently write your own procedures. Using Record Macro functionality While learning VBA and also later on during work, you might find that Record Macro is very useful. It allows to make few clicks and see how those clicks should be written in code. Sub SayHello MsgBox 'Hello world!' End Sub Writing a Function Procedure A Function procedure is a series of Visual Basic statements enclosed by the Function and End Function statements. A Function procedure is similar to a Sub procedure, but a function can also return a value. A Function procedure can take arguments, such as constants, variables, or expressions that are passed to it by a calling procedure.
I keep getting 'Visual Basic for applications is not loaded on this machine' when I am using Excel to unlock a spreadsheet. How do I load Visual Basic back into my MacBook? In Microsoft Excel 2007, 2010, 2013, 2016 and 2019 Ribbon, it is hard to find out the Visual Basic Editor command. That’s because it is moved into Developer tab, which is not in Ribbon: Firstly of all you need to add Developer Tab into Microsoft Excel 2007/2010/2013/2016/2019 Ribbon.
If a Function procedure has no arguments, its Function statement must include an empty set of parentheses. A function returns a value by assigning a value to its name in one or more statements of the procedure.
Syntax of Function procedure Public Private Friend Static Function name (arglist) As type statements name = expression Exit Function statements name = expression End Function Example. Function Rectangle ( A As Double, B As DoubleOptional Parimeter As Boolean = False ) As Double If Parimeter = False Then Rectangle = A. B Else Rectangle = 2. A + 2. B End If End Function Variables Variable is a named storage location that can contain data that can be modified during program execution. Each variable has a name that uniquely identifies it within its scope.
A data type can be specified or not. Variable names:. must begin with an alphabetic character,. must be unique within the same scope,. can't be longer than 255 characters,.
can't be the same as VBA function or keywords used in VBA,. can't contain spaces. Data types This table contain mostly used types of variables. To see all types please look up into Data Type Summary topic in VBE Help (in Visual Basic Editor press F1 and type Data Type Summary into search box). Static FirstVariable as Integer Public SecondVariable As String Public Const FirstConstatn = 'value of constant' Private and Public variables and constants has to be declared in the Declarations section of a module (above first procedure). Lifetime of variables The time during which a variable retains its value is known as its lifetime.
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The value of a variable may change over its lifetime, but it retains some value. When a variable loses scope, it no longer has a value. A) A procedure-level variable declared with the Dim statement retains a value until the procedure is finished running. If the procedure calls other procedures, the variable retains its value while those procedures are running as well. B) In a standard module or a class module, it retains its value until you stop running your code.
Data types checking TypeName - returns a String that provides information about a variable. Sub CheckDataType Dim a, b, c, d, e, f a = 'text' b = 23 c = 4565768 d = 45.67 e = True f = #1/1/1999# 'Debug.Print result is returned to the Immediate Window (Ctrl + G) Debug.Print TypeName(a) 'String Debug.Print TypeName(b) 'Integer Debug.Print TypeName(c) 'Long Debug.Print TypeName(d) 'Double Debug.Print TypeName(e) 'Boolean Debug.Print TypeName(f) 'Date End Sub IsNumeric - Returns a Boolean value indicating whether an expression can be evaluated as a number. IsNumeric(7) 'returns True IsNumeric('7') 'returns True IsNumeric('seven') 'returns False Constants Declares constants for use in place of literal values. Constans are Private by default. Syntax: Public Private Const constname As type = expression Example. Select Case testExpression Case expressionList - n statements - n. Case Else elseStatements End Select Exercises.
Write a procedure which asks for your name using INPUTBOX and then displays a welcome message using MSGBOX. Write a procedure that will check if the number is greater, smaller or equal to 7. The program at the end should display the number introduced by the user and the appropriate message.
Write a procedure that will check if the number is odd or even. The program at the end should display the number introduced by the user and the appropriate message. Use MsgBox to display a message asking user whether they want to continue or not, and process answer. Write a program that asks you to enter two numbers and then display greater of them. Write a program that asks you to enter three numbers, then displays the greatest of them. Write a program evaluating the students tests.
The program should asks you to enter number of points and then display the number of points and the score:. points 91 to 100 - A. points 81 to 90 - B.
points 71 to 80 - C. points 61 to 70 - D. points 51 to 60 - E. points 0 to 50 - F.
100. Sub ForEachLoopexample Dim wks As Variant For Each wks In Worksheets MsgBox wks. Name Next arkusz End Sub Do While (or Until). Loop You can use Do.Loop statements to run a block of statements an indefinite number of times.
The statements are repeated either while a condition is True or until a condition becomes True. Repeating Statements While a Condition is True Repeating Statements Until a Condition Becomes True There are two ways to use the While (and Until) keyword to check a condition in a Do.Loop statement. You can check the condition before you enter the loop, or you can check it after the loop has run at least once. Dim i As Integer For i = 30 To 0 Step - 0.6 Debug.
Print i Next 2. Write a procedure that will perform a countdown from 10 to 0, and then displays the message 'end of the countdown'. Write a program that calculates the sum of 5 consecutive integers, starting from 1. Option Base 1 Dim staticArray ( 10 ) 'Now the first index number is 1 Declaring dynamic arrays A dynamic array doesn’t have a preset number of elements. You declare a dynamic array with a blankset of parentheses.
Dim dynamicArray as String Before you can use a dynamic array in your code, you must use the ReDim statement to tell VBA how many elements are in the array. Redim dynamicArray(1 to 3) Any subsequent change size of the array by default deletes its contents. If you want to preserve the existing values, use ReDim Preserve. ReDim Preserve dynamicArray(1 to 4) Declaring multidimensional arrays Dim MyArray(-10 to 0, 1 to 100, 200 to 250) as Integer 'Three-dimensional Array. The first dimension indexed from -10 to 0, the second from 1 to 100 and the third from 200 to 250. An array in VBA can have up to 60 dimensions.
Excel for Office 365 Excel for Office 365 for Mac Excel 2019 Excel 2016 Excel 2019 for Mac Excel 2013 Excel 2010 Excel 2007 Excel 2016 for Mac Excel 2007 Developer Excel 2010 Developer Excel 2013 Developer The Macro Error message appears when there is an error in the macro that you were running. The specified method cannot be used on the specified object for one of the following reasons:. An argument contains a value that is not valid. A common cause of this problem is trying to gain access to an object that does not exist; for example, Workbooks(5), when only three workbooks are open. The method cannot be used in the applied context. Specifically, some Range object methods require that the range contain data.
If the range does not contain data, the method fails. An external error occurred, such as a failure to read or write from a file. (This issue does not apply to Mac) A method or property cannot be used because of security settings. For example, the properties and methods of the VBE object for manipulating the Visual Basic for Applications (VBA) code that is stored in a Microsoft Office document are inaccessible by default.
To turn on trusted access to Visual Basic Projects, do the following:. Enable the Developer tab on the ribbon. See for more information. On the Developer tab, in the Code group, click Macro Security.
Under Developer Macro Settings, select the Trust access to the VBA project object model check box. For more information about how to use the method, search for the method name in Visual Basic Help.