Article ID: 147650 - View products that this article applies to.
This article was previously published under Q147650
This article explains three methods you can use to navigate and access Microsoft Excel Application objects:
Each object in Microsoft Excel version 5.0 exists somewhere in the application's hierarchy of objects. You choose among these objects by navigating down that application's hierarchy. At the top of this hierarchy is the Application object. Whatever events or actions you assign to the Application object affect the entire application. For example:
Replace [Object] with any variable that points to any valid Microsoft Excel Application Object, which can be created from the following example:
The Application object contains other large objects. For example, you can use the following code to refer to the collection of Workbooks currently loaded in Microsoft Excel:
If you want to retrieve a single workbook from the collection, use the Item method. For example, to refer to the first workbook:
To close the first workbook:
Accessing Objects Using Longhand Reference or Default PropertiesEach workbook contains a collection of worksheets, each worksheet contains a collection of cells, and so on. (See the Microsoft Excel documentation and Help menu for specific details about Microsoft Excel's object hierarchy.) In code, references to a specific cell could look like this:
This reference can be lengthy and complex; however, shortcuts are available. Understanding the navigation operator (.) is fundamental to successful object programming.
Short CutsAll objects have a default property and method. For collections, the default method is the Item method. For most objects, the Name property is the default property. This convention was implemented to simplify programming. For example, the previous sample can be simplified to:
Accessing Objects by Aliasing ObjectsYou can use aliasing to simplify object programming. If you were to write a lot of code that was manipulating Sheet1, for example, the syntax could become lengthy. To prevent this, create an object that points to the lowest common object. This is known as aliasing. Use the Set statement to create an alias:
Accessing Objects by Using Parent and Application MethodsThe Parent and Application methods allow you to navigate back up the object hierarchy. The Application method navigates back to the application object, and the Parent method navigates up one level of the object hierarchy. All the examples in this article started with [Object]. As long as [Object] is a valid Microsoft Excel object, all of those statements are also valid. Regardless of the context of [Object].
This is very helpful when programming the Microsoft Excel object from Visual Basic version 4.0. Microsoft Excel exposes only the three objects that can be used as entry points to Microsoft Excel. These are:
There is no exposed Workbook object, so there's no way to access the Workbook object directly. However, this is not a problem because the Parent method of a Worksheet or Chart object returns the Workbook object. The following example code illustrates this point.
NOTE: oleExcel is an OLE control that contains an Excel.Sheet object.
Article ID: 147650 - Last Review: October 11, 2006 - Revision: 2.3
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