>On a text box I am using inputmask = 999,999.99 and format = K, but when droping the cursor (with the mouse) on the field and field value equals to 0 or blank, then it does not select the whole field.

Putting dodefault() in the GotFocus() event will take care of this, but, personally, I'm with Jim Nelson, if I'm using the mouse to get to a field, its not too hard to automatically select everything my self, I'd rather put the cursor where the mouse clicks.