I read somewhere that Visual Basic for Applications (VBA), the macro programming language that underlies Office programs such as Excel, uses an object-oriented programming model. What the heck is that?
Object-oriented programming is a metaphor that helps you organize the things in your programming environment. Five basic elements form the basis of object-oriented programming:
Objects, which represent things (such as worksheets, workbooks, cell ranges, and so on)
Properties, which describe objects (such as a worksheet’s name, or a cell’s value)
Methods, which refers to which procedures an object knows how to do (such as save a workbook or activate a worksheet)
Events, which are what an object knows how to respond to (such as activating a cell or saving a workbook)
Collections, which are sets of objects (such as all the worksheets in a workbook or all the cells in a range)
You concatenate an object’s properties and methods using dot notation: when you name the object, follow it with a period and then type the property or method you want to call. Here are two examples:
Worksheet("Sheet1").Name = "January" Range("A1").Calculate
The first statement sets the name of the worksheet called Sheet 1 to January, while the second statement uses the
method to make Excel recalculate the result of the formula in cell A1.
Programming in VBA is just like programming in any other language: there’s a learning curve. For many ...