Holding down keys?

[Freddie]

But if i disable HKN holding down the button allows continuous attack

You didn't paste any <KeyDown> messages. I'm going to be assume that they were generated but you just didn't bother pasting them. If in fact they aren't being generated, then the hotkey can't possibly work.

What game is it? Different games respond to injected keystrokes differently.

There are lots of possible reasons why the game isn't responding to HotkeyNet's movement hotkey. Since you say the game attacks once when you press the hotkey and once again when you release it, I woudl guess that the explanation is "typematic" repeats.

Typematic is the name for the automatic repeated keypresses that a keyboard generates when you hold a key down. It sounds like the "continuous" combat is really multiple responses to typematic keypress signals.

HotkeyNet's movement hotkeys don't generate typematic signals. They merely send a single keypress when you press the movement hotkey and a single key release when you lift your finger.

I don't know if this is the explanation -- there are other possible reasons, and I would probably have to do a lot of work with the game to be sure -- but if it is, HotkeyNet can't be used with this game for this purpose. Sorry.