C++

Question

我对C++的经验很少，对SendInput方法完全不熟悉。我已经通过注册表修改设置了我的笔记本电脑（带有英国键盘），以便在按住 right control 键并两次按下 scroll lock 时创建故障转储。我正在尝试通过在 Visual C++ 2010 Express 中编译的 c++ 可执行文件以编程方式实现此目的。

使用此 post: how to use sendinput function C++ as my inspiration, I have created the code snippet hereunder. Aside from multiple Cannot find or open the PDB debug outputs, which from reading this post: Error Message : Cannot find or open the PDB file 显然可以忽略，代码编译并运行。然而，没有蓝屏死机发生。我手动 "forced" 蓝屏死机，所以我知道它有效。

请记住我是新手，请解释必须进行哪些更改才能使其正常工作？

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

int main()
{
INPUT ip;
ip.type = INPUT_KEYBOARD;
ip.ki.wScan = 0;
ip.ki.time = 0;
ip.ki.dwExtraInfo = 0;

ip.ki.wVk = VK_RCONTROL;
ip.ki.dwFlags = 0; 
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = VK_SCROLL;
ip.ki.dwFlags = 0; 
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = VK_SCROLL;
ip.ki.dwFlags = KEYEVENTF_KEYUP;
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = VK_SCROLL;
ip.ki.dwFlags = 0;
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = VK_SCROLL;
ip.ki.dwFlags = KEYEVENTF_KEYUP;
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = VK_RCONTROL;
ip.ki.dwFlags = KEYEVENTF_KEYUP;
SendInput(1, &ip, sizeof(INPUT));

return 0;
}

Answer 1

以下是我编写的一个简单应用程序的相关代码，用于显示键入到应用程序中的键的虚拟键、扫描码、标志等。（代码演示了创建一个列表框并处理 WM_KEYDOWN、WM_KEYUP、WM_SYSKEYDOWN 和 WM_SYSKEYUP 消息，然后显示参数：

void CChildView::ReportKey (UINT nChar, UINT nRepCnt, UINT nFlags)
{
    CString str;
    str.Format ( "%s Virtual key=%d; Scan code=%d Extended=%d AltDown=%d",
             (nFlags & 0x8000) ? "Up" : "DOWN",
             nChar, (nFlags & 0xFF), !!(nFlags & 0x0100), !!(nFlags & 0x2000) );
    AddString (str);
}


void CChildView::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags)
{
    ReportKey (nChar, nRepCnt, nFlags);
    CListBox::OnKeyDown(nChar, nRepCnt, nFlags);
}

void CChildView::OnKeyUp(UINT nChar, UINT nRepCnt, UINT nFlags)
{
    ReportKey (nChar, nRepCnt, nFlags);
    CListBox::OnKeyUp(nChar, nRepCnt, nFlags);
}

void CChildView::OnSysKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags)
{
    ReportKey (nChar, nRepCnt, nFlags);
    CListBox::OnSysKeyDown(nChar, nRepCnt, nFlags);
}

void CChildView::OnSysKeyUp(UINT nChar, UINT nRepCnt, UINT nFlags)
{
    ReportKey (nChar, nRepCnt, nFlags);
    CListBox::OnSysKeyUp(nChar, nRepCnt, nFlags);
}

当按下 Right Control 键然后释放时，当此应用程序具有键盘焦点时，它会显示：

DOWN Virtual key=17; Scan code=29 Extended=1 AltDown=0
Up Virtual key=17; Scan code=29 Extended=1 AltDown=0

奇怪的是，虚拟键“17”是0x11，根据this chart是VK_CONTROL，而不是VK_RCONTROL！ Extended 标志为真。

当按下并释放Left Control键时，输出为：

DOWN Virtual key=17; Scan code=29 Extended=0 AltDown=0
Up Virtual key=17; Scan code=29 Extended=0 AltDown=0

所以似乎 Windows 从来没有看到 VK_RCONTROL，而是看到 VK_CONTROL 和 Extended = true。

所以尝试用它调用 SendInput()：

INPUT ip[6];
...
ip[0].ki.wVk = VK_CONTROL;
ip[0].ki.wScan = MapVirtualKey(VK_CONTROL, 0);
ip[0].ki.dwFlags = KEYEVENTF_EXTENDEDKEY; 
....
ip[5].ki.wVk = VK_CONTROL;
ip[5].ki.wScan = MapVirtualKey(VK_CONTROL, 0);
ip[5].ki.dwFlags = KEYEVENTF_KEYUP | KEYEVENTF_EXTENDEDKEY; 
SendInput(_countof(ip), &ip[0], sizeof(INPUT));

编辑：指定 ip.ki.wScan 由于 comment

not using KEYEVENTF_SCANCODE doesn't mean the wScan value will be ignored. It won't and some applications (e.g. RDP-Client) may behave different/wrong if you set wScan to 0.

编辑 2：我认为这在这里无关紧要，但最好只调用 SendInput 一次，然后将一组 INPUT 结构传递给它以作为事务执行，因此所有的击键都是作为一个单元重播（例如，用户不能在你的中间散布他自己的密钥）。

编辑 3：您可以 download the application 显示键入的键。

Answer 2

@David Ching...这让我很沮丧...我已经阅读了所有相关文档（并试图理解它，记住我是这方面的新手），我已经考虑到您的建议和我读过的内容，尝试了无数种代码排列。根据您最后的建议，下面的代码是我最后一次尝试但没有成功。我正在尝试确定哪些其他因素可能会影响该问题 - 硬件（笔记本电脑是 Toshiba Satellite L670D-10N）或 OS（Windows 7 Ultimate - 带有英语语言包的西班牙语版本）做出改变？ - 我无法想象。我真的非常感谢您的帮助，请不要放弃帮助！ - 顺便说一句，感谢应用 link.

#define WINVER 0x0500
#include <windows.h>

int main()
{
INPUT ip[6];

ip[0].ki.wVk = VK_CONTROL;
ip[0].ki.wScan = MapVirtualKey(VK_CONTROL, 0);
ip[0].ki.dwFlags = KEYEVENTF_EXTENDEDKEY;

ip[1].ki.wVk = VK_SCROLL;
ip[1].ki.dwFlags = 0;

ip[2].ki.wVk = VK_SCROLL;
ip[2].ki.dwFlags = KEYEVENTF_KEYUP;

ip[3].ki.wVk = VK_SCROLL;
ip[3].ki.dwFlags = 0;

ip[4].ki.wVk = VK_SCROLL;
ip[4].ki.dwFlags = KEYEVENTF_KEYUP;

ip[5].ki.wVk = VK_CONTROL;
ip[5].ki.wScan = MapVirtualKey(VK_CONTROL, 0);
ip[5].ki.dwFlags = KEYEVENTF_KEYUP | KEYEVENTF_EXTENDEDKEY;
SendInput(_countof(ip), &ip[0], sizeof(INPUT));

return 0;
}

更新 - 成功的 SENDINPUT 测试代码

#define WINVER 0x0500
#include <windows.h>

int main()
{
INPUT ip;

Sleep(3000);

ip.type = INPUT_KEYBOARD;
ip.ki.wScan = 0;
ip.ki.time = 0;
ip.ki.dwExtraInfo = 0;

ip.ki.wVk = 0x43;
ip.ki.dwFlags = 0; 
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = 0x43;
ip.ki.dwFlags = KEYEVENTF_KEYUP; 
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = 0x48;
ip.ki.dwFlags = 0; 
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = 0x48;
ip.ki.dwFlags = KEYEVENTF_KEYUP; 
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = 0x52;
ip.ki.dwFlags = 0; 
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = 0x52;
ip.ki.dwFlags = KEYEVENTF_KEYUP; 
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = 0x49;
ip.ki.dwFlags = 0; 
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = 0x49;
ip.ki.dwFlags = KEYEVENTF_KEYUP; 
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = 0x53;
ip.ki.dwFlags = 0; 
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = 0x53;
ip.ki.dwFlags = KEYEVENTF_KEYUP; 
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = 0x10;
ip.ki.dwFlags = 0; 
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = 0x43;
ip.ki.dwFlags = 0; 
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = 0x43;
ip.ki.dwFlags = KEYEVENTF_KEYUP; 
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = 0x48;
ip.ki.dwFlags = 0; 
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = 0x48;
ip.ki.dwFlags = KEYEVENTF_KEYUP; 
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = 0x52;
ip.ki.dwFlags = 0; 
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = 0x52;
ip.ki.dwFlags = KEYEVENTF_KEYUP; 
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = 0x49;
ip.ki.dwFlags = 0; 
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = 0x49;
ip.ki.dwFlags = KEYEVENTF_KEYUP; 
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = 0x53;
ip.ki.dwFlags = 0; 
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = 0x53;
ip.ki.dwFlags = KEYEVENTF_KEYUP; 
SendInput(1, &ip, sizeof(INPUT));

ip.ki.wVk = 0x10;
ip.ki.dwFlags = KEYEVENTF_KEYUP; 
SendInput(1, &ip, sizeof(INPUT));

return 0;
}

更新 - 不成功的修订 CTRL((SCROLL LOCK)X2) 代码

#define WINVER 0x0500
#include <windows.h>

int main()
{
INPUT ip[6] = {0};

Sleep(3000);

ip[0].ki.wVk = VK_CONTROL;
ip[0].ki.wScan = MapVirtualKey(VK_CONTROL, 0);
ip[0].ki.dwFlags = KEYEVENTF_EXTENDEDKEY;

ip[1].ki.wVk = VK_SCROLL;
ip[1].ki.wScan = MapVirtualKey(VK_SCROLL, 0);
ip[1].ki.dwFlags = 0;

ip[2].ki.wVk = VK_SCROLL;
ip[2].ki.wScan = MapVirtualKey(VK_SCROLL, 0);
ip[2].ki.dwFlags = KEYEVENTF_KEYUP;

ip[3].ki.wVk = VK_SCROLL;
ip[3].ki.wScan = MapVirtualKey(VK_SCROLL, 0);
ip[3].ki.dwFlags = 0;

ip[4].ki.wVk = VK_SCROLL;
ip[4].ki.wScan = MapVirtualKey(VK_SCROLL, 0);
ip[4].ki.dwFlags = KEYEVENTF_KEYUP;

ip[5].ki.wVk = VK_CONTROL;
ip[5].ki.wScan = MapVirtualKey(VK_CONTROL, 0);
ip[5].ki.dwFlags = KEYEVENTF_KEYUP | KEYEVENTF_EXTENDEDKEY;
SendInput(_countof(ip), &ip[0], sizeof(INPUT));

return 0;
}

Answer 3

此代码成功地将 RControl+ScrollLock+ScrollLock 填充到 ScanCode 应用程序中，但是，抱歉，计算机不会像手动键入这些键时那样重新启动。

#define WINVER 0x0500
#include <windows.h>

int main()
{
    // Must specify INPUT_KEYBOARD for all INPUT structs
    INPUT ip[6] = { 
            { INPUT_KEYBOARD },
            { INPUT_KEYBOARD },
            { INPUT_KEYBOARD },
            { INPUT_KEYBOARD },
            { INPUT_KEYBOARD },
            { INPUT_KEYBOARD },
    };

    Sleep(3000);


    // Specify keys by scancode.  For the VK_SCROLL, it was necessary
    // to instead specify the wVK, otherwise VK==3 was received by ScanCode, instead
    // of VK_SCROLL == 145!
    //ip[0].ki.wVk = VK_CONTROL;
    ip[0].ki.wScan = MapVirtualKey(VK_RCONTROL, MAPVK_VK_TO_VSC);
    ip[0].ki.dwFlags = KEYEVENTF_SCANCODE | KEYEVENTF_EXTENDEDKEY;

    ip[1].ki.wVk = VK_SCROLL;
    ip[1].ki.wScan = MapVirtualKey(VK_SCROLL, MAPVK_VK_TO_VSC);
    ip[1].ki.dwFlags = /*KEYEVENTF_SCANCODE*/ 0;

    ip[2].ki.wVk = VK_SCROLL;
    ip[2].ki.wScan = MapVirtualKey(VK_SCROLL, MAPVK_VK_TO_VSC);
    ip[2].ki.dwFlags = /*KEYEVENTF_SCANCODE |*/ KEYEVENTF_KEYUP;

    ip[3].ki.wVk = VK_SCROLL;
    ip[3].ki.wScan = MapVirtualKey(VK_SCROLL, MAPVK_VK_TO_VSC);
    ip[3].ki.dwFlags = /*KEYEVENTF_SCANCODE*/ 0;

    ip[4].ki.wVk = VK_SCROLL;
    ip[4].ki.wScan = MapVirtualKey(VK_SCROLL, MAPVK_VK_TO_VSC);
    ip[4].ki.dwFlags = /*KEYEVENTF_SCANCODE |*/ KEYEVENTF_KEYUP;

    //ip[5].ki.wVk = VK_CONTROL;
    ip[5].ki.wScan = MapVirtualKey(VK_RCONTROL, MAPVK_VK_TO_VSC);
    ip[5].ki.dwFlags = KEYEVENTF_SCANCODE | KEYEVENTF_KEYUP | KEYEVENTF_EXTENDEDKEY;

    int i = _countof(ip);
    int numSuccessful = SendInput(i, ip, sizeof(INPUT));
    if (numSuccessful == i)
        printf("Stuffed successful.\n");
    else
    {
        printf("Succeeded with %d of %d; error %d\n", numSuccessful, i, GetLastError());
    }

    return 0;
}

我认为原因是 SendInput() 将键注入到键盘驱动程序之上的层中，并且是键盘驱动程序监视这些击键以启动 BSOD。

C++ - 使用 SendInput 方法模拟击键，无法区分 rightctrl 键

C++ - Simulating keystrokes using SendInput method, failure to distinguish rightctrl key

bsod

exe

visual-studio-2010

sendinput