Specifies the bitmap that appears on the speed button.
Set Glyph to a bitmap object that contains the image that should appear on the face of the button. Bring up the Open dialog box from the Object Inspector to choose a bitmap file (with a .BMP extension).
Glyph can provide up to four images within a single bitmap. All images must be the same size and next to each other in a horizontal row. TSpeedButton displays one of these images depending on the state of the button.
If only one image is present, TSpeedButton attempts to represent the other states by altering the image slightly for each state, although the Down state is always the same as the Up state.
If the bitmap contains multiple images, specify the number of images in the bitmap with the NumGlyphs property.
Note: The lower left pixel of the bitmap is reserved for the “transparent” color. Any pixel in the bitmap that matches the lower left pixel will be transparent.