Hello Motohiro,
I'm not sure, if you want to customise the tooltip DatePopUpButton of
the date picker in the filter row or during EditMode of the grid.
aspx:
If you want to localize the ToolTip for the RadDatePicker
.DatePopUpButton in the Filter Row, check out the following code:
If you want to localize the ToolTip for the RadDatePicker
.DatePopUpButton during EditMode of the grid, check out the following code:
Thanks
Princy.