![]() For example, if you want to add a spelling checker to an application you could define all the variables and support functions to provide spell-checking functionality. Objects let you declare variables and procedures once and then reuse them whenever needed. Microsoft makes this easier by giving you Microsoft Transaction Server. This is called object 'pooling' where you pool all your resources together and dish them out when requested. If you have a lot of users using a database object for example, then you may want to open and close connections for each user. You will probably know that declaring something as Public allows anyone to access the variable, and declaring it as Private only lets the current module of code access the variable.Ĭode: Set m_clsClass1 = NothingThis way, we only have it loaded in memory when we need to use it. As with other variables, the Private and Public keywords can only be used in the General Declarations procedure. You can declare an object using either the Dim, Private or Public keyword. ![]() Although Visual Basic is not a completely object orientated language it does allow us to use objects in our code. This nifty little window allows you to see all the properties and methods of the objects currently loaded. For a better look at objects, either press F2 or click View, Object Browser. Objects are really easy, In fact, all the controls you see on your VB toolbox are all objects. Remember that? Well, what you are doing is setting the property Text, of the text box object Text1 to equal nothing. For example, you have probably used the following statement many times: They contain a set of methods and properties that allow you to make the object do certain things without actually having to look at the objects code. Objects are things that you can program with, things that make programming easier. ![]() An entire application can also be an object. ![]() An object can be a piece of an application, like a control or a form. An object is a combination of code and data that can be treated as a unit. ![]()
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