Getting 'KeyUP' event from other applications.

[Siberd]

Hello,

I would like to trigger an event in an application when the user releases a key. I want the trigger to happen, even if they do not currently have the application in focus.

I have no idea how this may be acheived, and have done a quick search of the forum already.

Many thanks,



/Sib
Thar ain't nuttin a good can o' raid won't fix!

 

[strongm]

Should have searched harder ... ;-)

Have a look at my code in thread222-118564. Obviously instead of WM_KEYDOWN (which that example uses) you'll want to check for WM_KEYUP instead

 

[Siberd]

Many thanks for your reply.
After reading through the code you posted there, and making a few changes for it to work in my application, (mainly, changing WM_KEYDOWN to WM_KEYUP and then calling my sub from the Function LowLevelKeyboardProc thusly:

check_and_send (HookStruct)

I've been unable to trigger a response. While the application is in focus, the old methods I had used to capture the keyup function normally, however, when the app is running, and I have another window in focus, nothing happens.

Have I called my sub improperly?

/Sib
Thar ain't nuttin a good can o' raid won't fix!

 

[Siberd]

Scratch that. I found the problem.

Although, now, on a keyup the application, and VB both crash, sadly, I don't get to see the error message.

/Sib
Thar ain't nuttin a good can o' raid won't fix!

 

[bjd4jc]

another quck search of this forum would indicate that you should run your program from within VB when you are subclassing...

 

[strongm]

Subclassing and hooking are not quite the same thing.

However, they do have two major similarities: you should never debug a live hook or subclass procedure (whether the debugging is deliberate - e.g. a break or watch point - or not - e.g. a runtime error - try and clear those up first without the hook/subclass in place), nor should you let the program exit whilst the hook or subclass is in place; the IDE will very likely explode in both cases (sometimes you are lucky and it appears to work, but you are just storing up trouble for later)