This component is used to input data into the program for further processing. It has a very important value while it is one of the most frequently used components and not only in language Delphi, and absolutely in all programming languages for any operating system.V article I will tell about the basic properties and methods of this component, in addition are various techniques for working with him. The most basic and frequently used property is TEdit.Text - it contains the user input, and Owned by this property is read the input data for use in computational processes. When working with this property must always keep check its value in a conditional statement if then else on the contents of the invalid characters. Sometimes you need is to programmatically select the contents of the component TEdit, and now I will give an example of the algorithm allows realzovat this technique. First we need to set the property autoselect TEdit component to false. We realize the code execution to the method onClick, and when you click on the text box of its contents will be allocated. Program listing: Edit1.SelStart: = 1; / / property establishes a character with whom you want to highlight Edit1.SelLength: = 4; / / This property sets the length of the allocated text Edit1.SetFocus; / / Set the focus on Edit1.
