A message control is a static line of text or a static bitmap. The text or bitmap corresponds to the message's label (see set-label).
Creates a string or bitmap message initally showing message. If message is a bitmap, then the bitmap must be valid (see ok? in bitmap%) and not installed in a bitmap-dc% object; otherwise, an exn:application:mismatch exception is raised.
If an ampersand (``&'') occurs in label, it is specially parsed; under Windows and X, the character following an ampersand is underlined in the displayed control to indicate a keyboard mnemonic. (Under MacOS, mnemonic underlines are not shown.) The mnemonic is meaningless for a message (as far as on-traverse-char is concerned), but it is supported for consistentcy with other control types. A programmer may assign a meaning to the mneumonic, e.g., by overriding on-traverse-char.
The style argument is provided for future extensions. Currently, style must be the empty list.