C@如何实现WH_CBT全局钩子?

Question

我把钩子相关的做成一个类库项目,再用其他FORM项目用这个类库,键盘和鼠标钩子可以有全局钩子,但是WH_CBT就是不行,怎么实现CBT或者SHELL的全局钩子?

Answer 1

#include "windows.h"
#pragma data_seg("MySeg")
HHOOK g_hCbtHook = NULL;
HANDLE g_hInst = NULL;
#pragma data_seg()
#pragma  comment(linker,"/section:MySeg,RWS")
BOOL APIENTRY DllMain( HANDLE hModule, 
                       DWORD  ul_reason_for_call, 
                       LPVOID lpReserved
                     )
{
    g_hInst = hModule;
    return TRUE;
}
static LRESULT CALLBACK CbtHookProc(int nCode, WPARAM wParam, LPARAM lParam)
{
    return CallNextHookEx(g_hCbtHook, nCode, wParam, lParam);
}
void HookCbt(bool bHook)
{
    if(bHook)
        g_hCbtHook = SetWindowsHookEx(WH_CBT, CbtHookProc, g_hInst, 0);
    else
        g_hCbtHook ? UnhookWindowsHookEx(g_hCbtHook) : NULL;
}

Answer 2

回调函数是放在dll里的
Hook.cpp内容如下：C/C++ code
#include "Hook.h"#pragma data_seg("MySeg")
HHOOK g_hCbtHook = NULL;
HWND g_hReceiveWnd = NULL;
#pragma data_seg()
#pragma  comment(linker,"/section:MySeg,RWS")// 设置接受消息的窗口
void SetReceiveWnd(HWND hWnd)
{
    g_hReceiveWnd=hWnd;
}
// 窗口切换钩子回调
static LRESULT CALLBACK CbtHookProc(int nCode, WPARAM wParam, LPARAM lParam)
{
    ::SendMessage(g_hReceiveWnd, WM_MY_MESSAGE, (WPARAM)nCode, lParam);
    return CallNextHookEx(NULL, nCode, wParam, lParam);
}
// 开关窗口切换钩子
bool HookCbt(bool bHook)
{
    if(bHook)
    {
        g_hCbtHook = ::SetWindowsHookEx(WH_CBT, CbtHookProc, GetModuleHandle(NULL), 0);
        return g_hCbtHook ? true : false;
    }
    else
    {
        g_hCbtHook ? UnhookWindowsHookEx(g_hCbtHook) : NULL;
        g_hCbtHook = NULL;
        return true;
    }
}
Hook.h内容如下：C/C++ code
#pragma once#include "windows.h"#define WM_MY_MESSAGE WM_USER + 1// 设置接受消息的窗口
void SetReceiveWnd(HWND hWnd);
// 窗口切换钩子回调
static LRESULT CALLBACK CbtHookProc(int nCode, WPARAM wParam, LPARAM lParam);
// 开关窗口切换钩子
bool HookCbt(bool bHook);
Hook.def内容如下：C/C++ code
LIBRARY    "Hook"EXPORTS
SetReceiveWnd    @2
HookCbt            @3

Answer 3

全局钩子必须是DLL，建议你用VC来写吧。

Answer 4

http://www.codeproject.com/KB/system/WilsonSystemGlobalHooks.aspx
这个解决问题.

Answer 5

只能先用VC做一个DLL项目,然后再用C#使用了