Windows Mobile 消息钩子（1）

在Windows中，设置键盘钩子很多人都做过，但是在windows Mobile系统中并没有直接的函数支持。但是我们可以通过使用undocument api来实现。

一、定义参数

#defineWH_KEYBOARD_LL20
#defineHC_ACTION0
typedefLRESULT(CALLBACK*HOOKPROC)(intcode,WPARAMwParam,LPARAMlParam);
typedefHHOOK (WINAPI*_SetWindowsHookExW)(int,HOOKPROC,HINSTANCE,DWORD);
typedefLRESULT (WINAPI*_CallNextHookEx)(HHOOK,int,WPARAM,LPARAM);
typedefLRESULT (WINAPI*_UnhookWindowsHookEx)(HHOOK);
typedefstruct
{
DWORDvkCode;
DWORDscanCode;
DWORDflags;
DWORDtime;
ULONG_PTRdwExtraInfo;
}KBDLLHOOKSTRUCT,*PKBDLLHOOKSTRUCT;

static_SetWindowsHookExWSetWindowsHookEx;
static_UnhookWindowsHookExUnhookWindowsHookEx;
static_CallNextHookExCallNextHookEx;

二、实现代码

LLKeyboardHookCallbackFunction就是回调函数

BOOLActivateKBHook(HINSTANCEhInstance,
HOOKPROCLLKeyboardHookCallbackFunction)
{
//weneedtomanuallyloadthesestandardWin32APIcalls
//MSDNstatesthatthesearen''tsupportedinWinCE
SetWindowsHookEx=NULL;
CallNextHookEx=NULL;
UnhookWindowsHookEx=NULL;
//从coredll.dll获取我们需要的函数
g_hHookApiDLL=LoadLibrary(_T("coredll.dll"));
if(g_hHookApiDLL==NULL)
{
returnFALSE;
}
else
{
SetWindowsHookEx=(_SetWindowsHookExW)GetProcAddress(
g_hHookApiDLL,_T("SetWindowsHookExW"));
if(SetWindowsHookEx==NULL)
{
returnFALSE;
}
else
{
g_hInstalledLLKBDhook=SetWindowsHookEx(WH_KEYBOARD_LL,
LLKeyboardHookCallbackFunction,hInstance,0);
if(g_hInstalledLLKBDhook==NULL)
{
returnFALSE;
}
}
CallNextHookEx=(_CallNextHookEx)GetProcAddress(g_hHookApiDLL,
_T("CallNextHookEx"));
if(CallNextHookEx==NULL)
{
returnFALSE;
}
UnhookWindowsHookEx=(_UnhookWindowsHookEx)GetProcAddress(g_hHookApiDLL,
_T("UnhookWindowsHookEx"));
if(UnhookWindowsHookEx==NULL)
{
returnFALSE;
}
}
returnTRUE;
}

BOOLDeactivateKBHook()
{
//unloadthehook
if(g_hInstalledLLKBDhook!=NULL)
{
UnhookWindowsHookEx(g_hInstalledLLKBDhook);
g_hInstalledLLKBDhook=NULL;
}
//unloadthecoredll.dll
if(g_hHookApiDLL!=NULL)
{
FreeLibrary(g_hHookApiDLL);
g_hHookApiDLL=NULL;
}
//wehaveterminatedgracefully
returnTRUE;
}

三、消息回调函数

一般的回调函数是这么写的，BlockKeyList是需要屏蔽的按键列表

intCLoginDlg::BlockKeyList[]={VK_TBACK,VK_TTALK,VK_TEND,VK_THOME};
LRESULTCALLBACKCLoginDlg::LLKeyboardHookCallbackFunction(intnCode,
WPARAMwParam,LPARAMlParam)
{
if(nCode>=HC_ACTION)
{
if(wParam==WM_KEYDOWN||wParam==WM_KEYUP
||wParam==WM_LBUTTONDOWN)
{
intcountKeyList=ARRAY_SIZEOF(BlockKeyList);
 for(inti=0;i<countKeyList;i++)
{
if((((KBDLLHOOKSTRUCT*)lParam)->vkCode)==BlockKeyList[i])
{
returnTRUE;
}
}
}
}
returnCallNextHookEx(g_hInstalledLLKBDhook,nCode,wParam,lParam);
}

Windows Mobile下不使用DLL也可以实现全局键盘钩子）

如果你只是要屏蔽所有按键的话可以简单的使用EnableHardwareKeyboard函数来实现。