SendInput won't release certain keys?

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randomdude

Joined: 01 Jun 2012
Posts: 83

randomdude 25 Nov 2013, 16:15

is it possible to release VK_CONTROL using SendInput? :S i tried everything with no success

another question, is it possible to disable a key from reaching any application except the one im using? in AutoHotkey i can use for example F1 for a macro and when pressing F1, the F1 key wont be detected by any other program. it seems to use BlockInput api but no idea how can i use it...

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25 Nov 2013, 16:15

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20303
Location: In your JS exploiting you and your system

revolution 26 Nov 2013, 03:12

randomdude wrote:

another question, is it possible to disable a key from reaching any application except the one im using? in AutoHotkey i can use for example F1 for a macro and when pressing F1, the F1 key wont be detected by any other program. it seems to use BlockInput api but no idea how can i use it...

I am aware of only one way to capture and filter keys and that is to use DLL injection. MS has a tutorial on how to setup DLL injection, so perhaps you can search for that. A lot of utility software uses injection to capture various actions.

26 Nov 2013, 03:12

baldr

Joined: 19 Mar 2008
Posts: 1651

baldr 26 Nov 2013, 10:25

randomdude,

For Win2000+ you may try RegisterHotKey().

26 Nov 2013, 10:25

randomdude

Joined: 01 Jun 2012
Posts: 83

randomdude 26 Nov 2013, 12:15

great, thx!

Code:

proc start

        stdcall RegisterHotKeys
        .msg_loop:
        invoke  GetMessage,Msg,0,0,0
        test    eax,eax
        jz      .end
        cmp     dword[Msg.message],WM_HOTKEY
        jne     .msg_loop
        stdcall CheckHotkey,dword[Msg.wParam]
        cmp     byte[ExitApp],1
        jne     .msg_loop
        .end:
        stdcall UnregisterHotKeys
        ;invoke  MessageBox,0,teststr,testcap,MB_OK
        invoke  ExitProcess,0
endp

now i just have the annoying problem of SendInput not releasing VK_CONTROL, does anyone have any idea of why? :/

26 Nov 2013, 12:15

randomdude

Joined: 01 Jun 2012
Posts: 83

randomdude 27 Nov 2013, 12:43

edit:

jesus... finally i found out the issue...

Code:

INPUT INPUT_KEYBOARD,<VK_?,0,KEYEVENTF_KEYUP,0,0>

every value was being send as a dword, so the dwFlags was always 0

now.. any idea on how can specify the value size in macro? Very Happy

27 Nov 2013, 12:43

baldr

Joined: 19 Mar 2008
Posts: 1651

baldr 27 Nov 2013, 17:27

randomdude,

Swap mi and ki members of anonymous union inside INPUT structure.

It's only a palliative solution, if you need both keyboard and mouse events, use something like INPUT INPUT_KEYBOARD,<VK_CONTROL+0 shl 16,KEYEVENTF_KEYUP,0,0> (i.e. use MOUSEINPUT template for initializer and pack wVk and wScan into doubleword manually).

As a side note, invoke SendInput,4,keyboard_ctrl_v,sizeof.INPUT doesn't correspond with number of members in keyboard_ctrl_v array.

27 Nov 2013, 17:27

randomdude

Joined: 01 Jun 2012
Posts: 83

randomdude 06 Dec 2013, 13:44

for now i just removed the wScan parameter that im not using. thanks anyway for the suggestions, baldr Smile

yeah, i forgot to remove the four VK_RETURN inputs from the example

06 Dec 2013, 13:44

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