To add a custom format mask to the default format masks list:
Choose EditPreferences.
In the Preferences dialog box, click Edit Masks.
In the Format Masks dialog box, set Display to the type of format mask you want to add.
In the Mask field, type the format mask to add, then click Add.
Click OK.
Now, you will see your new custom format masks in the list of values for
the Format Mask property for fields and the Input Mask property for parameters.
Applying a format mask to a numeric object
Applying a format mask to a date object
Changing the format mask for multiple fields
Specifying date and time format masks
Specifying number format masks
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