Thread: What's wrong with "INPUT ttnptt;"?

Hi there,

What's wrong with declaring "INPUT ttnptt;" in main.c? No matter how the variable is named: nptt, or ttnptt, it gets the same error as "main.c(58) : error C2061: syntax error : identifier 'ttnptt'". We know that INPUT is Declared in Winuser.h, which is included in Windows.h.

Could anyone please give advice on this? This is very much appreciated.
: Thanks,

Code:

#include <windows.h>

...

INPUT ttnptt;

..


        cl -Z7 -Od -c -W3 -DCRTAPI1=_cdecl -DCRTAPI2=_cdecl -nologo -D_X86_=1 
-D_WINNT -D_WIN32_WINNT=0x0400 -D_WIN32_IE=0x0300 -DWINVER=0x0400 -DWIN32  -D_WIN32 main.c
main.c
main.c(58) : error C2061: syntax error : identifier 'ttnptt'
main.c(58) : error C2059: syntax error : ';'
NMAKE : fatal error U1077: 'cl' : return code '0x2'
Stop.

Code:

#define _WIN32_WINNT 0x500
#include <windows.h>

Thanks so much. The error becomes warning as the following:

Code:

main.c(21) : warning C4005: '_WIN32_WINNT' : macro redefinition
        unknown(0) : see previous definition of '_WIN32_WINNT'

Thanks so much. The warning was gone now. But why following code can not be compiled?

INPUT is a structure surely, why "error C2224: left of '.type' must have struct/union type"?

Code:

INPUT inp;

inp.type = INPUT_KEYBOARD;
inp.ki.wVk = 0;
inp.ki.wScan = 0xded2;
inp.ki.dwFlags = KEYEVENTF_UNICODE;
inp.ki.time = 0;
inp.ki.dwExtraInfo = 0;
hResult = SendInput(1, (LPINPUT) &inp, sizeof(INPUT));


cl -Ox -c -W3 -DCRTAPI1=_cdecl -DCRTAPI2=_cdecl -nologo -D_X86_=1 -D_WINNT 
-D_WIN32_WINNT=0x0450 -D_WIN32_IE=0x0400 -DWINVER=0x0450 -DWIN32 -D_WIN32 main.c
main.c
main.c(349) : error C2224: left of '.type' must have struct/union type
main.c(350) : error C2224: left of '.ki' must have struct/union type
main.c(351) : error C2224: left of '.ki' must have struct/union type
main.c(352) : error C2224: left of '.ki' must have struct/union type
main.c(352) : error C2065: 'KEYEVENTF_UNICODE' : undeclared identifier
main.c(353) : error C2224: left of '.ki' must have struct/union type
main.c(354) : error C2224: left of '.ki' must have struct/union type
NMAKE : fatal error U1077: 'cl' : return code '0x2'
Stop.

typedef struct tagINPUT { 
  DWORD type; 
  union {MOUSEINPUT mi; 
            KEYBDINPUT ki;
            HARDWAREINPUT hi;
           };
  }INPUT, *PINPUT

Thanks,

INPUT is a structure surely, why "error C2224: left of '.type' must have struct/union type"?

If memory serves me correctly, you must also include the WinAble.h header file to provide the necessary support (structs etc.) for SendInput

Even #include <winable.h> is added, the error messages are the same. I check winable.h, all declarations about INPUT and KEYBDINPUT are the same as they are in winuser.h, which is included in windows.h

Thanks,

This example works for me with winable.h but does NOT compile if I use winuser.h. It just turns the Caps Lock light on.

Code:

// Compile: cl key.cpp
#pragma comment( lib, "user32.lib" ) 
#include <windows.h>
#include <WinAble.h> // Required for the SendInput function
int main(void)
{
    INPUT input[2];
    ZeroMemory(input, sizeof(input));        
    input[0].type = input[1].type = INPUT_KEYBOARD;
    input[0].ki.wVk  = input[1].ki.wVk = VK_CAPITAL;
    SendInput(2, input, sizeof(INPUT));
    return 0;
}

Thank you all. It works now.