How to write a sub procedure in vba how to create

It does not make a difference if you call a built-in or a custom procedure. Related Creating a Sub or Function procedure Call a Sub To call a Sub procedure from another procedure, type the name of the procedure and include values for any required arguments.

How to write a sub procedure in vba how to create

The different between these types is: ByVal — Creates a copy of the variable you pass.


The following code example shows this: There are two main reasons for this: The person passing a value may not expect it to change and this can lead to bugs that are difficult to detect.

In the following example, we call the sub first without parentheses and then with parentheses. This causes the code to behave differently. Print "x before no parentheses: Print "x after no parentheses: Print "x before with parentheses: Print "x after with parentheses: However, if you return a value from the function then ByRef will work as normal as the code below shows: This means The variable you pass will not be accidentally changed.

Using parentheses will not affect the behaviour. It does not affect the actual object. If we look at the example below: We can assign anything to this variable and it will not affect the original one. When we pass the coll variable using ByRef, we are using the original variable.

If we assign something else to this variable then the original variable will also be assigned to something else. You can see find out more about this here. Optional Parameters Sometimes we have a parameter that will often be the same value each time the code runs. We can make this parameter Optional which means that we give it a default value.

It is then optional for the caller to provide an argument. In the example below, we have the report name as the optional parameter: If you do this you will get an Expected: In the screenshot below you can see that the name parameter is in square parentheses.

You may want to provide arguments to only some of the parameters. There are two ways to do this: The examples below show both methods: Normally we check against the default value but in certain cases we may not have a default.

We use IsMissing with Variant parameters because it will not work with basic types like Long and Double. Print "Parameter missing" Else Debug. Have a look at the function in the next example.

If you use this function in a cell you will get the result 99 in the cell as that is what the function returns.The calling procedure can be either a VBA Sub procedure or a VBA Function procedure.

Option #2: By calling it from the Immediate Window of the Visual Basic Editor. Option #3: By using it in a formula, such as a worksheet formula or a formula used to specify conditional formatting. By the way, executing a Sub procedure means the same thing as running or calling a Sub procedure.

You can use whatever terminology you like.

how to write a sub procedure in vba how to create

You can use whatever terminology you like. You can execute a VBA Sub in many ways; that’s one reason you can do so many useful things with Sub procedures. Download the entire VBA course archive (PDF) EXCEL-PRATIQUE. VBA Course: Procedures and Functions.

Public - Private. For the moment, all the procedures that we have created are of the Public type, which means that they are accessible from any module.

Arguments make it possible to use values from a procedure in a sub procedure (remember. As an example, let's create a very simple VBA Sub procedure (named Squared_Caller) whose only purpose is to call the Squared VBA Function procedure to square the number 15 and display the result in a message box.

How do I call a VBA Function into a Sub Procedure. Ask Question. If you want, you can actually bind the function to the form control's event without having to create an event procedure under the control. To do this, you first need a public function in the module instead of a sub, like this: Calling a Sub Procedure – 3 Way technique.

A VBA procedure unit or block consists of a procedure statement (Sub or Function) and an ending statement with statements in between A VBA procedure is constructed from three types of statements: executable, declaration and assignment statements.

How to: Create a Procedure (Visual Basic) | Microsoft Docs