Teach Yourself Borland C++ in 14 Days - portal

162 Day 5
3. Locate the Align property and change it to alClient. The picture component fills
the client area of the form.
4. Locate the Stretch property and change it to true.
5. Locate the Picture property and double-click the Value column.
6. The Picture Editor dialog box is displayed. Click the Load button. The File Open
dialog box is displayed.
7. Navigate to the \CBUILDER\IMAGES\SPLASH\256COLOR directory and choose an image
from those presented (I like HANDSHAKE.BMP). Click OK.
8. You are now back to the Image Editor dialog box, and the bitmap you chose is
displayed in the preview window. Click OK. (If you want to choose a different
bitmap, click the Load button again.) The bitmap now fills the client area of the
form.
9. Click the Run button. When the application runs you can size the window, and
the bitmap will always fill the client area of the window.
See how easy it is? It would have been even easier if we hadn’t bothered to make the image
fill the client area of the form. Figure 5.7 shows the bitmap test program running.
Figure 5.7.
The bitmap test
program running.
Summary
Today you have learned about frameworks. You first learned about OWL and MFC and the
role they have had in shaping Windows programming today. After that you learned about
VCL and how it differs from the C++ frameworks. We discussed properties, methods, and
events, and you got a little hands-on experience in the process. We finished up today with
an overview of the VCL classes that you are likely to encounter when programming in
C++Builder. I didn’t cover them all, but I gave you a brief look at the most commonly used
classes.