As far I understand your question you want to achieve something like this online DateTimePicker example
, but in the ErrorToolTip. Unfortunately the desired behavior cannot be achieved as the validation in example is done after the value is parsed and the ToolTip validation is done live depending on chars in the input string. However you can check the this
article from our documentation and implement custom ToolTip and then by using custom logic to check the CurrentDateTimeText property and to show different ToolTip depending on the entered text.
Hope this helps. If you have any other questions let us know.
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