当我们选择文件，双击文件和拖动文件时，系统发出什么消息？

鼠标消息

鼠标的9个消息
1.WM_LBUTTONDBLCLK     //鼠标左键双击
2.WM_LBUTTONDOWN       //鼠标左键按下
3.WM_LBUTTONUP         //鼠标左键放开
4.WM_MBUTTONDOWN       //鼠标中键按下
5.WM_MBUTTONUP         //鼠标中键放开
6.WM_RBUTTONDBLCLK     //鼠标右键双击
7.WM_RBUTTONDOWN       //鼠标右键按下
8.WM_RBUTTONP          //鼠标右键放开
9.WM_MOUSEMOVE         //鼠标移动

可是下以的DLL代码，调用后双击没反应……
#include<windows.h>

extern "C"__declspec(dllexport) void startHook();
extern "C"__declspec(dllexport) void stopHook();

HHOOK hook=NULL;

LRESULT CALLBACK HookProc(int nCode,WPARAM wparam,LPARAM lparam)
{
    MOUSEHOOKSTRUCT *lpmouse=NULL;
    if(nCode<0)
        return CallNextHookEx(hook,nCode,wparam,lparam);
    if(nCode==0)
    {
        if(WM_LBUTTONDBLCLK==wparam)
        {
            lpmouse=(MOUSEHOOKSTRUCT *)lparam;
            MessageBox(lpmouse->hwnd,"不能双击!","错误！",0);
        }
    }
    return CallNextHookEx(hook,nCode,wparam,lparam);
}

void startHook()
{
    hook=SetWindowsHookEx(WH_MOUSE,HookProc,GetModuleHandle("mydll3.dll"),0);
}

void stopHook()
{
    if(hook!=NULL)
        UnhookWindowsHookEx(hook);
}

从网上下个例子，根据你的情况改了下，可以实现你的功能，解压后运行mouse就行，源文件在两个文件夹中！

刚刚接触 还望指教