`INPUT' undeclared (first use in this function)|

This is a discussion on `INPUT' undeclared (first use in this function)| within the C Programming forums, part of the General Programming Boards category; Hello, I'm trying to do some DX inputs but I have this error: C:\beep\beep\main.c|11|error: `INPUT' undeclared (first use in this ...

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    `INPUT' undeclared (first use in this function)|

    Hello, I'm trying to do some DX inputs but I have this error:
    C:\beep\beep\main.c|11|error: `INPUT' undeclared (first use in this function)|

    What can I do to solve this?

    at Defines.h I have both setInputDX and releaseInputDX prototypes.

    Code:
    #include <stdio.h>
    #include <stdlib.h>
    #include <process.h>
    #include <windows.h>
    #include <winuser.h>
    #include "Bip.h"
    #include "Defines.h"
    #define _WIN32_WINNT 0x0500
    
    static void setInputDX(WORD inputCodeSet) {
            INPUT inp[1]; //ERROR AT THIS LINE
    	memset(inp, 0, sizeof(INPUT));
    	inp[0].type = INPUT_KEYBOARD;
    	inp[0].ki.wScan = inputCodeSet;
    	inp[0].ki.dwExtraInfo = 0;
    	SendInput(1, inp, sizeof(INPUT));
    }
    
    static void releaseInputDX(WORD inputCodeRelease) {}
    
    int main() {
       
        setInputDX(RCONTROL);
        releaseInputDX(RCONTROL);
        
        return -1;
    }

  2. #2
    and the Hat of Guessing tabstop's Avatar
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    Why do you believe that INPUT should be defined? Edit: Alright, I see windows.h now.
    Last edited by tabstop; 11-21-2008 at 08:00 PM.

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    Change this:
    Code:
    #define _WIN32_WINNT 0x0500
    To this:
    Code:
    #define _WIN32_WINNT 0x0501

  4. #4
    Registered User hk_mp5kpdw's Avatar
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    Where is the INPUT type declared? In one of those headers?
    "Owners of dogs will have noticed that, if you provide them with food and water and shelter and affection, they will think you are god. Whereas owners of cats are compelled to realize that, if you provide them with food and water and shelter and affection, they draw the conclusion that they are gods."
    -Christopher Hitchens

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    Quote Originally Posted by hk_mp5kpdw View Post
    Where is the INPUT type declared? In one of those headers?
    INPUT is declared at WinUser.h

    between lines 5279 and 5292

    Code:
    #define INPUT_MOUSE     0
    #define INPUT_KEYBOARD  1
    #define INPUT_HARDWARE  2
    
    typedef struct tagINPUT {
        DWORD   type;
    
        union
        {
            MOUSEINPUT      mi;
            KEYBDINPUT      ki;
            HARDWAREINPUT   hi;
        };
    } INPUT, *PINPUT, FAR* LPINPUT;


    I changed to #define _WIN32_WINNT 0x0501 but unfortunately I got the same error above:

    Code:
    C:\beep\beep\main.c|8|warning: "_WIN32_WINNT" redefined|
    C:\CodeBlocks\MinGW\bin\..\lib\gcc\mingw32\3.4.5\..\..\..\..\include\windef.h|20|warning: this is the location of the previous definition|
    C:\beep\beep\main.c||In function `setInputDX':|
    C:\beep\beep\main.c|11|error: `INPUT' undeclared (first use in this function)|
    C:\beep\beep\main.c|11|error: (Each undeclared identifier is reported only once|
    C:\beep\beep\main.c|11|error: for each function it appears in.)|
    C:\beep\beep\main.c|11|error: syntax error before "inp"|
    C:\beep\beep\main.c|12|error: `inp' undeclared (first use in this function)|
    C:\beep\beep\main.c|13|error: `INPUT_KEYBOARD' undeclared (first use in this function)|
    C:\beep\beep\main.c|16|warning: implicit declaration of function `SendInput'|
    ||=== Build finished: 6 errors, 3 warnings ===|

  6. #6
    and the Hat of Guessing tabstop's Avatar
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    I can confirm that in VSExpress it compiles correctly. I don't yet see why gcc won't compile it.

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    Post

    Quote Originally Posted by tabstop View Post
    I can confirm that in VSExpress it compiles correctly. I don't yet see why gcc won't compile it.
    Yeah.. I made this test right now too. VSEx compiles perfectly. I have no idea what's going on with GCC.


  8. #8
    and the Hat of Guessing tabstop's Avatar
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    Sometimes it's the easy things...

    Define winntwhatever to be 0x500 before including windows.h.

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    Quote Originally Posted by tabstop View Post
    Sometimes it's the easy things...

    Define winntwhatever to be 0x500 before including windows.h.
    [100.0%] Compiling: main.c
    Process terminated with status 0 (0 minutes, 0 seconds)
    0 errors, 0 warnings


    thanks IN ADVANCE tabstop!!!

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