替换全局热键

Question

I have a application that lives in the tray and I would like to define serveral hotkeys which will trigger events in my program.

I found inspiration from the excellent answer by @AaronLS in this question: Set global hotkeys using C#

If I register a hot key that are already defined by another application RegisterHotKey will return false and not register it. So how can I override or replace a hot key?

Answer 1

So how can I override or replace a hot key?

Ostensibly, you can't. That's by-design. Imagine if programs could hijack other program's hotkeys at-will - that wouldn't be pleasant.

The Win32 UnregisterHotKey function requires the caller to be the same thread that registered using RegisterHotKey , which makes it impossible for another program to unregister another program's hotkeys:

UnregisterHotKey function:

Frees a hot key previously registered by the calling thread .

What you can do is use Win32 to inject code into a remote process (assuming your own process has permsision to do this) then schedule code in that process's UI thread that then calls UnregisterHotKey - but that's another question.