In my Outlook Custom Form I have Date field and using function IsDate in Item_Write event to validate if user typed valid Date in textbox, when he try to save custom form with invalid date. But instead of my message when user typed invalid date in textbox, standard Microsoft Outlook message running: "You must specify a valid date and time. Verify that what you typed is both a valid date and a valid time, and make any necessary corrections."
Is there any way to run my message instead of standard Microsoft Outlook message, which is confuse for users as tell about date and time?
Is there any way to run my message instead of standard Microsoft Outlook message, which is confuse for users as tell about date and time?