Does the phGantXControl OCX support UNICODE?
I use the method SetGridCellString passing a unicode string, but I see only question marks.
Yes the phGantTimePackage fully handles UNICODE characters. You will need fonts on your machine to represent the data you are trying to show.
Test it like this. Go to www.google.jp (japan), if you have the japan fonts you see soma japanese text, if you do not have the fonts you will see squares (or garbarge). If you see kanji text Copy it, and paste it in to the Grid. You should find that the grid keeps the kanji letters just like it should.