Teach Yourself Borland C++ in 14 Days - portal

302 Day 8
Figure 8.6.
The predefined
BitBtn types.
The Margin Property
The Margin property specifies the margin between the glyph and the edge of the button
(which edge this property affects is determined by the value of the Layout property). The
default is -1, which centers the glyph and the text in the button. Enter any positive value to
set an absolute margin (in pixels).
The NumGlyphs Property
The NumGlyphs property specifies the number of glyphs you have in your bitmap strip for a
particular button. You can supply from one to four glyphs, as mentioned. The glyphs must
appear in the bitmap strip in this order: Up, Disabled, Down, Stay Down.
The Spacing Property
The Spacing property controls the distance, in pixels, between the glyph and the button’s
text. The default value is 4 pixels.
The SpeedButton Component
The SpeedButton component was designed to be used on speedbars. It is different from the
Button and BitBtn components in that it is not a windowed component. This means that a
speed button cannot receive input focus and cannot be tabbed to. On the other hand, the
SpeedButton component has several things in common with the BitBtn component. The way
in which the Glyph property is handled by the SpeedButton component is exactly the same
as with the BitBtn component, so I’m not going to go over that ground again. There are a
couple major differences, though, so let’s go over those.
By default, speed buttons are square and are 25×25 pixels. Your speed buttons may be any
size you like and can contain text, although typically speed buttons do not contain text. There
are some properties specific to speed buttons that you should be aware of, which I’ve broken
down in the following sections.