Teach Yourself Borland C++ in 14 Days - portal

6
180 Day 6
Palette. Click these scroll buttons to display tabs not currently in view. Likewise, if a particular
page of the Component Palette contains more buttons than will fit the width of the display
window, scroll buttons will be enabled to allow you to scroll through the available buttons.
Figure 6.6 shows the Component Palette with both types of scroll buttons enabled.
Figure 6.6.
The Component
Palette scroll buttons.
The Component Palette is not terribly complicated, but a basic understanding of its use is
vital for programming with C++Builder. Now that we’ve finished with these little tasks, we
can get back to the main topic again.
Back on Track—A Multiple-Form
Application
To illustrate how C++Builder uses units, let’s create an application with multiple forms. We’ll
create a simple application that displays a second form when you click a button:
1. Create a new project by choosing File | New Application from the main menu.
2. Change the Name property to MainForm and the Caption property to Multiple Forms
Test Program.
3. Save the project. Save the unit as Main and the project as Multiple.
4. Now place a button on the form. Make the button’s Name property ShowForm2 and
the Caption property Show Form 2.
5. Choose File | New Form from the main menu (or click the New Form button on
the speed menu) to create a new form.
At this point the new form has a name of Form1 and is placed exactly over the main form. We
want the new form to be smaller than the main form and more or less centered on the main
form. Continuing on, then….
6. Size and position the new form so that it is about 50 percent the size of the main
form and centered on the main form. Use the title bar to move the new form. Size
the form by dragging the lower-right corner.