Ok, I try,
iconcls, you can only use these:?
x-form-clear-trigger
x-form-search-trigger
x-form-trigger
x-form-date-trigger
And as for imageindex, I put a UniNativeImageList, and indicated it in the images property of the uniDbLookUpComboBox component, but when selecting the image in imageindex the trigger button doesn't show the selected image.