I found this for 3.6
** The following Matlab-compatible handle graphics functions have been
added:
guidata uipanel uitoolbar
guihandles uipushtool uiwait
uicontextmenu uiresume waitfor
uicontrol uitoggletool
The uiXXX functions above are experimental.
Except for uiwait and uiresume, the uiXXX functions are not
supported with the FLTK+OpenGL graphics toolkit.
The gnuplot graphics toolkit does not support any of the uiXXX
functions nor the waitfor function.
What is the status of the uiXXX system now in 3.8.1?
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DAS