Hello Dimo,
Thanks for answer.
I tried using MaskedTextBox, but I have a problem.
When user is in px unit, I want an input with 4 digits
When in % unit, I need to reset the range to 0-100
Here is my code (the mak is initialized in load with px )
The error occurs on set_value.
Anyway I will have a look on your suggestions.
Regards
CS