Series Overview: Tips and Tricks with VBA Classes

In their simplest form, VBA classes can create basic objects. By diving into advanced concepts, classes introduce some common features present in traditional object oriented programming languages. Overview This is the fourteenth and final post of the Tips and Tricks with VBA Classes series. This post acts as a summary …

VBA Interfaces: The Implements Statement

The VBA Implements statement permits the use of interfaces, a mechanism to build clarity and consistency between multiple classes. As VBA projects grow, interfaces can be a central component of how a developer interacts with classes and custom objects. Overview This is the twelfth post in the Tips and Tricks …

VBA Inheritance: Custom Objects as Class Properties

Inheritance is a concept that permits the transfer of data from one class to another class. While common in many programming languages, it is not native to VBA. In the absence of true inheritance, effective coding can help mimic its behavior.

Storing Objects as Class Properties

In most situations, Excel objects, such as shapes and buttons, perform simple functions and stand on their own. However, when stored within a class, the opportunity exists to supplement the functionality of custom objects.

Storing Arrays as Class Properties

There may be situations where a single class property is needed to store multiple values. This can support a list of data or provide the foundation for a loop. VBA classes provide the framework to store arrays as class properties. Overview This is the ninth post in the Tips and …

Using Methods and Properties within a Collection Class

The VBA collection class provides a framework to support basic object structures. While its most common use a collection class to manage groups of custom objects, including new properties and methods permits extraction of key aggregate data points for the entire collection. Overview This is the eight post in the …

Forcing Class Properties to do More Work

Class properties are typically simple statements which serve the basic purpose of reading or writing data in custom objects. However, it is possible to add additional lines of code, giving properties features similar to standard subroutines or functions.

Storing Multiple Object Collections in a Collection Class

While VBA collection classes are best known for storing collections of single custom object types, they can also be built into much more complex data structures. This includes storing multiple object collections within a single collection class, permitting a node-like structure to store any number of related items.

Creating a Collection Class within a Collection Class

A common object structure in VBA is the collection class, where many custom objects are grouped together. VBA also permits additional layers above the collection class, resulting in a collection within a collection. This is a useful technique for organizing hierarchical data or grouping certain objects.

Using Custom Keys in Collection Classes

Accessing a specific object within a collection class can be a challenging endeavor. By assigning a proper custom key to objects in a collection class, you can avoid the often cumbersome error handling and loop searches often used to retrieve objects.