HOW ALL DAYS OF A MONTH WILL BE RESULT WITH TEXT BOX IN FORMS
Sorry, but your question is confusing and incomplete.
Perhaps you wish to know how to determine how many days there are in a
month. If so what month? How does Access know which month? Which year?
Let's assume the current month.
You can use the DateSerial function. Look it up in VBA help files.
The day 0 of the following month will tell you how many days there are
in the current month.
=DateSerial(Year(Date()),Month(Date()) + 1,0)
Change Date() to a field name [DateFieldName] if you want the number
of days in the month of a date stored in a date field.