Comtrol eCos - Manual (Page 784)

Writing New Devices - host
synth::handle_help < URL >
synth::load_image can be used to add a new image to the current interpreter. If the specified file has a .xbm
extension then the image will be a monochrome bitmap, otherwise it will be a colour image of some sort. A
boolean will be returned to indicate success or failure, and suitable diagnostics will be generated if necessary.
synth::register_balloon_help provides balloon help for a specific widget, usually a button on the toolbar.
synth::handle_help is a utility routine that can be installed as the command for displaying online help, for exam-
ple:
.menubar.help add command -label "my device" -command \
[list synth::handle_help "file://$path"]
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