speedbutton就是一个普通的按钮控件阿,和button控件差不多的
//来自zhumoo
>它可以设置按钮的图标，通过设置它的FLAT为TRUE，还可以使它只在鼠>
>标经过时才呈现突起状态。
Use TSpeedButton to add a button to a group of buttons in a form.
TSpeedButton introduces properties that can be used to set graphical
images that represent the different button states (selected,
unselected, disabled and so on).
Use other properties to specify multiple images or to rearrange
the images and text on the button.
TSpeedButton also introduces properties that allow speed buttons to
work together as a group. Speed buttons are commonly grouped in panels
to create specialized tool bars and tool palettes.
Note: To create a speed button with a client-aligned
glyph that covers the button's edges, add a 1-pixel margin
around the button's top and left edges and a 3-pixel margin
around its bottom and right edges. Do this by manually editing
the bitmap specified by the Glyph property.
