VI Keydown event interferes with menu selection

[David Moerman]

My application requires that the user log a data point with a spacebar pressed. To do this, I want to use the Key Down event at the VI level. However, I find that when I include this event it disables the keyboard's Alt- menu selection, even though I'm passing all the parameters through KeyDown unchanged. I've included a skeleton VI that exhibits this behaviour. Has anyone else run into/overcome this problem?

Thanks,
David Moerman
Advanced Measurements Inc
www.advmeas.com

[Jeremy Braden]

Instead of using keydown, use keyup. I have written the attached VI to decode the scancodes on my computer so that one can tell what key was pressed. Unlike with keydown, this method allows the alt-keys of the window to work and it will indicate a larger number of keys.

Jeremy Braden
National Instruments