Page 219 - DCAP408_WEB_PROGRAMMING

Unit 13: Windows GDI

needs to be redrawn (or NULL for the whole window) and a Boolean indicating if you wish the Notes
window to be cleared first. So the standard call for clearing the whole window is:
InvalidateRect(hWnd,NULL,TRUE);

Self Assessment

Fill in the blanks:
1. To display some text you can use the …………………… function.
2. To obtain the handle you call: BeginPaint, it takes your window handle and a pointer to a
……………………………….. that you have declared.
3. We can use a macro (RGB) to convert from three Red, Green and Blue values to a
…………………………….. type.

4. Additionally the colour you want to set the …………………….. to can be provided.
5. You can use ……………………. and LineTo to position a pen on the screen and draw a line
to another position.

6. …………………… draws lines between points defined in an array you pass to the function.
7. Additionally the user can simply alter the ………………. of your window at any time.
8. You can use a bitmap as a repeating pattern for your brush using ………………………….
9. A ………………….. defines the style and colour that pixels will be drawn in while a brush
determines the fill colour of shapes.
10. The ………………….. structure contains member variables left, right, top and bottom.



Caselet Banking on BlackBerry

here's this old joke about two campers who spy a grizzly coming towards them
from afar. One of them immediately takes off his shoes and substitutes them for
Trunners. "Why are you doing that? You can't outrun that bear even with running
shoes," said his friend, to which he replied, "Who cares about the grizzly? All I have to do
is outrun you."
Employ this logic in the real world, and you see a similar situation with mobile
manufacturers who are busy trying to woo users, and have to keep developers on their
side. Because if you can't attract developers, you won't get any great apps, and without
apps, your smartphone isn't worth the pixels on its screen.

Rise of the Underdog?

In this game, BlackBerry is at a slight disadvantage because it is not perceived to be a big
player, and so has to strive a little harder to keep up.

Pointing this out, Anil Pai, Mobile Security Analyst, TCS, says, "Android and iPhone are
the market leaders, followed by Windows. BlackBerry is in the fourth spot and may pick
up in future." Pai says that the launch of the QNX operating system for BlackBerry in a few
Contd...

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