MaskBox.Mask (gb.form)
Property Mask As String
Return or set the control mask.
The mask is a string that depicts how characters are validated. If the mask is void, then the 
MaskBox acts like a normal 
TextBox.
| 
Mask item
 | 
Function
 | 
Default character
 | 
Description
 | 
[...]
 | 
Character range
 | 
Space
 | 
Every character in the range is allowed. The syntax of the character range is the same as in the LIKE instruction.
 | 
?
 | 
Any character
 | 
Space
 | 
Any character is allowed.
 | 
0
 | 
Mandatory digit
 | 
Zero
 | 
Any digit is allowed.
 | 
# or 9
 | 
Optional digit
 | 
Space
 | 
Any digit is allowed.
 | 
A
 | 
Letter
 | 
Space
 | 
Any ASCII letter is allowed.
 | 
<
 | 
Right-aligned field
 | 
N/A
 | 
The characters between the last separator and the < character will be right-aligned.
 | 
!
 | 
Focus
 | 
N/A
 | 
Define where is the default character position of the control when it gets the focus.
 | 
| 
Other characters
 | 
Separator
 | 
N/A
 | 
Any other character is a separator that will be displayed as is on the screen.
 | 
\
 | 
Quoting
 | 
N/A
 | 
If you want to use a special character as a separator, you have to quote it with the \ quoting character.
 | 
Examples
| 
Mask
 | 
Meaning
 | 
$#,###,##0<!.##
 | 
Currency.
 | 
##0<.##0<.##0<.##0<
 | 
IPv4 address.
 | 
99/99/9999
 | 
Some date.
 | 
A[A-Za-z0-9_][A-Za-z0-9_][A-Za-z0-9_]
 | 
A four character identifier.
 |