Does anyone know if it's possible to use dtpicker in Excel 2010 64-bit? I have successfully used it with Excel 2010 32-bit in the past by copying the mscomct2 file and registering it but that doesn't seem to work any longer. I've registered it under the system32 and SysWOW64 directories to see if either would work. While I don't get an error on the registration, I do get an error when I load an Excel sheet with the control already in place. For the time being, I cannot change the control to something else either.