My requirement ins simple .. but I just dunno how to get this done. All I need is a Mask Combo Box. ie. I have a DropDownList (style) combo box. So I let users select from its list or type a value. But I want to restrict a few characters from getting typed.
I thought of having my MaskCombo class overriding PreTranslateMessage. I can trap the key and if it is one of the restricted chars I can return ZERO. But since I need only a few valid chars., I'd have to put in a whole lot of things to restrict. I dont want to do this.
Let me put this in simpler words. How do I restrict the user input to just Numbers, "-" and A to Z (Caps) ONLY !