Question : Allow only uppercase characters in a column

My SQL Server Collation is "SQL_Latin1_General_CP1_CI_AS", which is
case in-sensitive. But is some cases, I would like to allow only uppercase
characters in a column. How can I achieve this using Contraints ?

Answer : Allow only uppercase characters in a column

there must be some conditions preventing the codes.

check if any of the follwing is true

* The control may be a type that can't receive the focus, such as a label.
* The control's Visible property may be set to No.
* The control's Enabled property may be set to