如果我的程序不在前台，如何检测鼠标滚动事件 [英] How to detect mouse scroll events if my program is not in foreground

问题描述

我写了一个程序，在游戏中渲染叠加，显示一些额外的信息。我可以通过使用GetKeyState检测键盘和一些鼠标按键，但没有虚拟键代码向上和向下滚动，我也想使用。

I wrote a program which render overlay in game, showing some additional info. I can detect keyboard and some of mouse keypresses by using GetKeyState, however there is no Virtual Key Code for scroll up and down which I would like to use as well.

我知道滚动是以事件的方式处理，而不是按键，但这不是真正的帮助。

I know that scroll is handled more in a way of an event, rather than keypress, but that doesn't really help. So is there any solutions for my problem?

我想到的事情：

1. 通过某些功能检测滚动事件？


2. 以某种方式在我的程序中将Windows消息发送到游戏中（称为Hooking IIRC）

我使用Visual Studio 2013 Express [C ++]

I'm using Visual Studio 2013 Express [C++]

推荐答案

我使用下面的代码解决了这个问题。

I solved the issue by using following code.

LRESULT CALLBACK mouseProc(int nCode, WPARAM wParam, LPARAM lParam)
{
    using namespace MouseLog;
    MSLLHOOKSTRUCT * pMouseStruct = (MSLLHOOKSTRUCT *)lParam;

    if (pMouseStruct != NULL)
    {
        if (wParam == WM_MOUSEWHEEL)
        {
            if (HIWORD(pMouseStruct->mouseData) == 120) MScrollUp = 1;
            else MScrollDown = 1;
        }
        if (wParam == WM_MBUTTONDOWN)
            MScrollBtn = 1;

        //printf("Mouse position X = %d  Mouse Position Y = %d\n", pMouseStruct->pt.x, pMouseStruct->pt.y);
    }
    return CallNextHookEx(hMouseHook, nCode, wParam, lParam);
}

DWORD WINAPI MouseLogger(LPVOID lpParm)
{
    HINSTANCE hInstance = GetModuleHandle(NULL);
    hMouseHook = SetWindowsHookEx(WH_MOUSE_LL, mouseProc, hInstance, NULL);

    MSG message;
    while (GetMessage(&message, NULL, 0, 0)) {
        TranslateMessage(&message);
        DispatchMessage(&message);
    }
    UnhookWindowsHookEx(hMouseHook);
    return 0;
}

要启动MouseLogger，请使用CreateThread（）。

For starting MouseLogger use CreateThread().

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