我用hook截获了一个键盘消息后为什么会弹出两个对话框，应该只有一次的

2007-04-30 10:36:29 403 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

初学者该如何学python怎么学好python？根据本人的学习经验，我总结了以下十点和大家分享： 1）学好python的第一步，就是马上到www.python.org网站上下载一个python版本。我建议初学者，不要下载具有IDE功能的集成开发环境，比如Eclipse插件等。 2）下载完毕后，就可以开始学习了。学习过程中，我建议可以下载一些python的学习文档，比如《dive into python》，《OReilly - Learning Python》等等。通过学习语法，掌握python中的关键字语法，函数语法，数学表达式等等 3）学完了基本语法后阅读详情

#include "stdafx.h"
#include "hook.h"
#include <stdio.h>
HINSTANCE g_hInst;
#pragma data_seg ("shared")
static HHOOK g_hHook=NULL;
#pragma data_seg ()
LRESULT CALLBACK KeyboardProc(int iCode,WPARAM wParam,LPARAM lParam);
BOOL APIENTRY DllMain( HANDLE hModule,
DWORD ul_reason_for_call,
LPVOID lpReserved
)
{
switch(ul_reason_for_call)
{
case DLL_PROCESS_ATTACH:
g_hInst = HINSTANCE(hModule);
break;
case DLL_PROCESS_DETACH:
break;
case DLL_THREAD_ATTACH:
break;
case DLL_THREAD_DETACH:
break;
}
return 1;
}

DLLEXPORT int CALLBACK InstallHOOK()
{
g_hHook=SetWindowsHookEx(WH_KEYBOARD,KeyboardProc,g_hInst,0);
if (g_hHook)
return TRUE;
else
return FALSE;
}

DLLEXPORT int CALLBACK UninstallHOOK()
{

if (UnhookWindowsHookEx(g_hHook)==0)
return FALSE;
else
return TRUE;

}

LRESULT CALLBACK KeyboardProc(
int iCode, // hook code
WPARAM wParam, // virtual-key code
LPARAM lParam // keystroke-message information
)
{

if((GetAsyncKeyState(VK_CONTROL)&0X8000)&&wParam==VK_F12)
{
MessageBox(NULL, "DLL", "www", MB_OK);
}

return CallNextHookEx(g_hHook,iCode,wParam,lParam);

}

MessageBox(NULL, "DLL", "www", MB_OK)会出现两次,怎么回事啊???
其他的.h .cpp .def就只是一些定义而已

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「已注销」 2007-04-30

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晕啊，弄了半天还是没有弄好

「已注销」 2007-04-30

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我找到了，lparam做位跟状态的判断，wParam==VK_F12，应该是这样吧

wltg2001 2007-04-30

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MSDN上没有吗？我看一下。
WM_KEYDOWN:lParam
Specifies the repeat count, scan code, extended-key flag, context code, previous key-state flag, and transition-state flag, as shown in the following table.
0-15
Specifies the repeat count for the current message. The value is the number of times the keystroke is autorepeated as a result of the user holding down the key. If the keystroke is held long enough, multiple messages are sent. However, the repeat count is not cumulative.
16-23
Specifies the scan code. The value depends on the OEM.
24
Specifies whether the key is an extended key, such as the right-hand ALT and CTRL keys that appear on an enhanced 101- or 102-key keyboard. The value is 1 if it is an extended key; otherwise, it is 0.
25-28
Reserved; do not use.
29
Specifies the context code. The value is always 0 for a WM_KEYDOWN message.
30
Specifies the previous key state. The value is 1 if the key is down before the message is sent, or it is zero if the key is up.
31
Specifies the transition state. The value is always zero for a WM_KEYDOWN message.
WM_KEYUP:
lParam
Specifies the repeat count, scan code, extended-key flag, context code, previous key-state flag, and transition-state flag, as shown in the following table.
0-15
Specifies the repeat count for the current message. The value is the number of times the keystroke is autorepeated as a result of the user holding down the key. The repeat count is always one for a WM_KEYUP message.
16-23
Specifies the scan code. The value depends on the OEM.
24
Specifies whether the key is an extended key, such as the right-hand ALT and CTRL keys that appear on an enhanced 101- or 102-key keyboard. The value is 1 if it is an extended key; otherwise, it is 0.
25-28
Reserved; do not use.
29
Specifies the context code. The value is always 0 for a WM_KEYUP message.
30
Specifies the previous key state. The value is always 1 for a WM_KEYUP message.
31
Specifies the transition state. The value is always 1 for a WM_KEYUP message.

「已注销」 2007-04-30

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Message parameter???有没有详细一点的资料啊，网上也没有这个参数具体传的什么东西，每一位代表什么意思

wltg2001 2007-04-30

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你两个消息的lparam应该有所区别，你查一下MSDN，看一下对这两个消息的这个参数的描述。

「已注销」 2007-04-30

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我是在HOOK中设置的，那里应该怎么设置啊？最好是组合键弹起CONTROL+F12,我要写一个老板键，就像青鹏游戏类似的功能

wltg2001 2007-04-30

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你按一下键盘对应的确实是两个消息，一个按下，一个弹上，对应的是WM_KEYDOWN和WM_KEYUP

「已注销」 2007-04-30

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别的网友的代码可能是vc++6.0的，我用的是vs2003,会不会是编译器的原因

「已注销」 2007-04-30

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我知道没有啊,
// HOOK.cpp : Defines the entry point for the DLL application.
//

#include "stdafx.h"
#include "hook.h"
#include <stdio.h>

HINSTANCE g_hInst;
static HHOOK g_hHook=NULL;

LRESULT CALLBACK KeyboardProc(int iCode,WPARAM wParam,LPARAM lParam);

BOOL APIENTRY DllMain( HANDLE hModule,
DWORD ul_reason_for_call,
LPVOID lpReserved
)
{
switch(ul_reason_for_call)
{
case DLL_PROCESS_ATTACH:
g_hInst = HINSTANCE(hModule);
break;
case DLL_PROCESS_DETACH:
break;
case DLL_THREAD_ATTACH:
break;
case DLL_THREAD_DETACH:
break;
}
return 1;
}

DLLEXPORT int CALLBACK InstallHOOK()
{
g_hHook=SetWindowsHookEx(WH_KEYBOARD,KeyboardProc,g_hInst,0);
if (g_hHook)
return TRUE;
else
return FALSE;
}

DLLEXPORT int CALLBACK UninstallHOOK()
{

if (UnhookWindowsHookEx(g_hHook)==0)
return FALSE;
else
return TRUE;

}

LRESULT CALLBACK KeyboardProc(
int iCode, // hook code
WPARAM wParam, // virtual-key code
LPARAM lParam // keystroke-message information
)
{

MessageBox(NULL, "dll", "www", MB_OKCANCEL);
return CallNextHookEx(g_hHook,iCode,wParam,lParam);

}
会不会是#include "stdafx.h"的问题，但是其他的key都没有问题，就是F12，所以才很头痛

huaren801007 2007-04-30

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在KeyboardProc中,其实会执行两次,一次是键盘按下,另一次是KeyUp

KBDLLHOOKSTRUCT* p = (KBDLLHOOKSTRUCT*)lParam;
if(!(p->flags & LLKHF_UP))
{
// 按下处理
// 不想让其他处理的话,返回TRUE
}

wltg2001 2007-04-30

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是不是你系统中有另外的钩子处理了F12了。

「已注销」 2007-04-30

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无遇到了一个很诡异的问题
LRESULT CALLBACK KeyboardProc(
int iCode, // hook code
WPARAM wParam, // virtual-key code
LPARAM lParam // keystroke-message information
)
{

MessageBox(NULL, "DLL", "www", MB_OK);

return CallNextHookEx(g_hHook,iCode,wParam,lParam);

}
我按其他的键都没有问题，只要一按F12就死机，怎么回事啊,

我用hook截获了一个键盘消息后为什么会弹出两个对话框，应该只有一次的

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