GetAsyncKeyState.

This is a discussion on GetAsyncKeyState. within the Windows Programming forums, part of the Platform Specific Boards category; GetAsyncKeyState is global, even if my application is minimized, it will check for key input. Is there any way of ...

  1. #1
    deletedforumuser
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    GetAsyncKeyState.

    GetAsyncKeyState is global, even if my application is minimized, it will check for key input. Is there any way of doing it for a single application?

  2. #2
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    You could either check for input with GetAsyncKeyState only if your window is active, or you could just use Windows messages which does that for you. It all depends on what you're making.

  3. #3
    deletedforumuser
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    I'm making a game, i need a key input system for a console based application.

    There's a way of hooking async with one program...but how to?

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    As far as I know, no. I would try my first idea. Just check if your window is active using IsWindowEnabled, and if it is then check for input with GetAsyncKeyState.

    Edit: This probably also belongs in Windows...

  5. #5
    C++まいる!Cをこわせ! Elysia's Avatar
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    You really do not need to mess around with this is you used a real input API, such as DirectInput. It was made for games.
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    Microsoft now recommends raw input over DirectInput. There probably are alternative, more portable game input libraries available though. Check into SDL, although I recommend SFML.

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    Code:
    if(GetAsyncKeyState(key) && GetFocus()==yourhwnd){
        handle the input
    }
    Last edited by maxorator; 11-09-2008 at 01:19 AM.
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  9. #9
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    Since you will be using this in a game, you will go into your GetAsyncKeyState loop, so first you wanna check the GetFocus() == yourhwnd, and then go into your key waiting loop.
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  10. #10
    C++まいる!Cをこわせ! Elysia's Avatar
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    Just don't burn out the CPU. Check if the key was pressed down (or up) since the last call. It is a semi-buffered API, but it is better than nothing.
    Although better would be to use a real buffered API such as that DirectInput & probably other input API offers.
    Quote Originally Posted by Adak View Post
    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
    Quote Originally Posted by Salem View Post
    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.

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