c++中如何使用sendinput函数

how to use sendinput function C++

本文关键字:sendinput 函数 何使用 c++      更新时间:2023-10-16

我不知道输入了什么参数,即使我看到了msdn的sendinput函数。

UINT WINAPI SendInput(
_In_ UINT nInputs,
_In_ LPINPUT pInputs,
_In_ int cbSize
);

上面的参数是什么意思,我需要为它们创建什么?还有,打字。wScan,吻。时间,吻。dwExtraInfo,吻。wVk, ki.dwFlags上面的宾语是什么意思,还有其他经常使用的宾语吗?

UINT为无符号整数类型。_In_表示参数是您发送到函数中的输入参数。这与输出参数相反,后者是您发送的内容,函数将填充。

LPINPUT结构定义如下:

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

所以它看起来像一个DWORD加上一些其他结构的并集。参考WinUser.h获取更多信息。

DWORD是32位无符号整数(源):

DWORD是一个32位无符号整数(范围:0到4294967295)小数)。因为DWORD是无符号的,所以它的第一个位(最高有效位)不为签名保留位(MSB)。此类型声明为

: typepedef unsigned long DWORD, *PDWORD;

MOUSEINPUT

typedef struct tagMOUSEINPUT {
    LONG    dx;
    LONG    dy;
    DWORD   mouseData;
    DWORD   dwFlags;
    DWORD   time;
    ULONG_PTR dwExtraInfo;
} MOUSEINPUT, *PMOUSEINPUT, FAR* LPMOUSEINPUT;

KEYBDINPUT

typedef struct tagKEYBDINPUT {
    WORD    wVk;
    WORD    wScan;
    DWORD   dwFlags;
    DWORD   time;
    ULONG_PTR dwExtraInfo;
} KEYBDINPUT, *PKEYBDINPUT, FAR* LPKEYBDINPUT;

HARDWAREINPUT

typedef struct tagHARDWAREINPUT {
    DWORD   uMsg;
    WORD    wParamL;
    WORD    wParamH;
} HARDWAREINPUT, *PHARDWAREINPUT, FAR* LPHARDWAREINPUT;

WORD, LONG, ULONGULONG_PTR都在MSDN页面上定义良好(见右侧栏)

下面是一个使用SendInput的例子,可以很容易地通过谷歌找到(来源):

//
// keystroke.c - Pauses, then simulates a key press
// and release of the "A" key.
//
// Written by Ted Burke - last updated 17-4-2012
//
// To compile with MinGW:
//
//      gcc -o keystroke.exe keystroke.c
//
// To run the program:
//
//      keystroke.exe
//
// ...then switch to e.g. a Notepad window and wait
// 5 seconds for the A key to be magically pressed.
//
// Because the SendInput function is only supported in
// Windows 2000 and later, WINVER needs to be set as
// follows so that SendInput gets defined when windows.h
// is included below.
#define WINVER 0x0500
#include <windows.h>
int main()
{
    // This structure will be used to create the keyboard
    // input event.
    INPUT ip;
    // Pause for 5 seconds.
    Sleep(5000);
    // Set up a generic keyboard event.
    ip.type = INPUT_KEYBOARD;
    ip.ki.wScan = 0; // hardware scan code for key
    ip.ki.time = 0;
    ip.ki.dwExtraInfo = 0;
    // Press the "A" key
    ip.ki.wVk = 0x41; // virtual-key code for the "a" key
    ip.ki.dwFlags = 0; // 0 for key press
    SendInput(1, &ip, sizeof(INPUT));
    // Release the "A" key
    ip.ki.dwFlags = KEYEVENTF_KEYUP; // KEYEVENTF_KEYUP for key release
    SendInput(1, &ip, sizeof(INPUT));
    // Exit normally
    return 0;
}

你问题的另一部分:

同样,键入,ki。wScan,吻。时间,吻。dwExtraInfo,吻。wVk, ki.dwFlags上面的对象是什么意思

我相信你指的是来自MSDN页面的这段代码:

// IMPORTANT: Current keyboard layout 0xf0010413 (Netherland with USA kbd)!!!!!!!
WORD vkCode = 0x36; // '6'
INPUT keyEvent = {0};
keyEvent.type = INPUT_KEYBOARD;
keyEvent.ki.wVk = vkCode;
keyEvent.ki.wScan = MapVirtualKeyEx(vkCode, 0, (HKL)0xf0010413);
SendInput(1, &amp;keyEvent, sizeof(keyEvent));

这段代码是由另一个用户在页面上发布的;这不是文档的一部分。用户只需创建一个名为keyEventLPINPUT结构,然后访问该结构的KEYBDEVENT部分:

KEYBDINPUT      ki;