text box

[Hechmi]

Hello,
I have a text box in which I want that a user can only write a number or the
character 'x' but I can't do that
could any one help me please thank you

 

[Herfried K. Wagner]

Hello,

I have a text box in which I want that a user can only write a
number or the character 'x' but I can't do that
could any one help me please thank you

The best solution is to allow any input and check it in the textbox's
Validating event.

Regards,
Herfried K. Wagner

 

[Hechmi]

thank you Herfied,
But are there any way to prevent him to write some characters.

 

[Herfried K. Wagner]

Hello,

But are there any way to prevent him to write some characters.

This will prevent the user from typing an "A":

\\\
Private Sub TextBox1_KeyPress( _
ByVal sender As Object, _
ByVal e As System.Windows.Forms.KeyPressEventArgs _
) Handles TextBox1.KeyPress
If e.KeyChar = "A" Then
e.Handled = True
End If
End Sub
///

Regards,
Herfried K. Wagner