Hi, Bloom was about the only setting I could see that used such a wide range for precision. Your right about the limit I reported sounding weird, so I manually forced a range a step at a time first in Max direction then in Min direction. I hit the limit of Max 32767 and Min -32768, which makes a little more sense (Total 65535 from -min to +max). What I do find odd is I can not use Min 0 To Max 65535 or Min -65535 To Max 0 Prior I just set the min/max as -+80000 and it came back as the max limit -+14464. I should know better then to assume....lol I did a brief search on MSDN and they don't really tell you the min/max limit of a predefined trackbar control. They mention GetMin/MaxRange, SetMin/MaxRange but no mention of the actual limit of the range.