C# Hook鼠标消息

在用C#做一个游戏的脚本，要控制鼠标。在脚本允许的时候，用户乱动鼠标会影响脚本的正常操作，故需要屏蔽掉用户对游戏的鼠标。

之前对hook也不是很了解，在网上搜了一圈，都是hook全局鼠标的，自己试验，全局也hook成功了，在对窗口hook时，怎么都不成功·····

再搜，了解到全局hook，不需要把代码放到线程内执行，对窗口hook，是把自己的代码放到窗口的线程内执行，所以，需要用C++写成DLL···

放代码：

 

#include "stdafx.h"
#include <windows.h>
#include <string>
#include <iostream>

//-------------------------------------------------------------
// global variables (unshared!)
//

HHOOKg_hHook = 0;

 

//-------------------------------------------------------------
// HookProc
// Notice:
// - executed by the instance of "HookInjEx.dll" mapped into "explorer.exe";
//
// When called from InjectDll:
// -sublasses the start button;
// -removes the hook, but the DLL stays in the remote process
//though, because we increased its reference count via LoadLibray
//(this way we disturb the target process as litle as possible);
//
// When called from UnmapDll:
// -restores the old window procedure for the start button;
// - reduces the reference count of the DLL (via FreeLibrary);
// -removes the hook, so the DLL is unmapped;
//
//Also note, that the DLL isn't unmapped immediately after the
//call to UnhookWindowsHookEx, but in the near future
//(right after finishing with the current message).
//Actually it's obvious why: windows can NOT unmap the
//DLL in the middle of processing a meesage, because the code
//in the hook procedure is still required.
//That's why we can change the order LoadLibrary/FreeLibrary &
//UnhookWindowsHookEx are called.
//
//FreeLibrary, in contrast, unmapps the DLL imeditaley if the
//reference count reaches zero.
//
#define pCW ((CWPSTRUCT*)lParam)

LRESULT HookProc(
int code, // hook code
WPARAM wParam, // virtual-key code
LPARAM lParam // keystroke-message information
)
{
return 1;
return ::CallNextHookEx(g_hHook, code, wParam, lParam);

}

//-------------------------------------------------------------
// InjectDll
// Notice:
//- injects "HookInjEx.dll" into "explorer.exe" (via SetWindowsHookEx);
//- subclasses the START button (see HookProc for more details);
//
//Parameters: - hWnd = START button handle
//
//Return value:1 - success;
//0 - failure;
//
extern "C" __declspec(dllexport) int InjectDll(char *str)
{
HINSTANCE hDll = ::GetModuleHandle("Win32Project2.dll");//获取dll的句柄

HWND g_hWnd = FindWindow(NULL, str);//查找窗口
if (g_hWnd > 0)
{
g_hHook = SetWindowsHookEx(WH_MOUSE, (HOOKPROC)HookProc,
hDll, GetWindowThreadProcessId(g_hWnd, NULL));

if (g_hHook == NULL)//失败
{
return 0;
}

}
else//未找到窗口
{
return 0;
}

return 1;
}

//-------------------------------------------------------------
// UnmapDll
// Notice:
//- restores the old window procedure for the START button;
//- unmapps the DLL from the remote process
// (see HookProc for more details);
//
//Return value:1 - success;
//0 - failure;
//
extern "C" __declspec(dllexport) int UnmapDll()
{

if (UnhookWindowsHookEx(g_hHook))
{
return 1;
}
else
{
return 0;
}
}

 

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