Hello Everyone,
I am new and hope you all are doing well.
I have a question regarding a Combo Box.
I created a Combo Box with lists as:
Math
Chemistry
English
History
How can I select item from the lists only once? For example , if I select 'Math', then next time If I select 'Math' again, I would
like to get a warning message such as 'You already select Math'.
Thanks
Frank
I am new and hope you all are doing well.
I have a question regarding a Combo Box.
I created a Combo Box with lists as:
Math
Chemistry
English
History
How can I select item from the lists only once? For example , if I select 'Math', then next time If I select 'Math' again, I would
like to get a warning message such as 'You already select Math'.
Thanks
Frank