| UInt_t | fCloseness | allowable RGB deviation |
| Colormap_t | fColormap | colormap to use |
| Int_t | fDepth | depth of window |
| UInt_t | fHeight | height of picture |
| Mask_t | fMask | mask specifying which attributes are defined |
| UInt_t | fNpixels | number of used color pixels |
| ULong_t* | fPixels | list of used color pixels (if set use delete[]) |
| UInt_t | fWidth | width of picture |
| UInt_t | fXHotspot | picture x hotspot coordinate |
| UInt_t | fYHotspot | picture y hotspot coordinate |
