DislikedMT4 comes packaged with the custom indicator called "Ichimoku", which displays a non-solid cloud made up of vertical lines and border lines. As with all the custom indicators, it is of the .mq4 format allowing access to the code. However, tucked away in the ordinary indicator list is the "Ichimoku Kinko Hyo" which accomplishes the solid cloud display. Unfortunately the indicators on that list are not of the .mq4 version allowing access to the code. Perhaps someday someone will be able to provide that hidden code....Ignored
http://codebase.mql4.com/257
Though I couldn't tell with absolute certainty that it is indeed the code of the embedded indicator in MT4, there are fair chances that it shall be.