Hello All, I have a GUI with various input boxes. They have the $ES_NUMBER style. Each box starts off empty, then the user can type any number from 1 to 99. In use, 95% of the time I either type a 1 into the box or leave it emtpy, so I thought it would be natty if double clicking would fill in the 1 for me. I've searched the help file, but can't find out if it's possible to capture a double click on an input box, can anybody help please? Thanks in advance, Simbo