reactos/modules/rosapps/applications/explorer-old/notifyhook/notifyhook.c

117 lines
2.6 KiB
C

/*
* Copyright 2004 Martin Fuchs
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
//
// NotifyHook DLL for ROS Explorer
//
// notifyhook.cpp
//
// Martin Fuchs, 17.03.2004
//
#include "../utility/utility.h"
#include "notifyhook.h"
static HINSTANCE s_hInstance;
static UINT WM_GETMODULEPATH;
static HHOOK s_hNotifyHook;
BOOL APIENTRY DllMain(HINSTANCE hInst, DWORD dwReason, LPVOID param)
{
switch(dwReason) {
case DLL_PROCESS_ATTACH:
s_hInstance = hInst;
DisableThreadLibraryCalls(hInst);
WM_GETMODULEPATH = RegisterWindowMessageA("WM_GETMODULEPATH");
break;
}
return TRUE;
}
struct COPYDATA_STRUCT {
HWND _hwnd;
int _len;
char _path[MAX_PATH];
};
LRESULT CALLBACK NotifyHookProc(int code, WPARAM wparam, LPARAM lparam)
{
MSG* pmsg = (MSG*)lparam;
if (pmsg->message == WM_GETMODULEPATH) {
struct COPYDATA_STRUCT cds;
COPYDATASTRUCT data;
cds._hwnd = pmsg->hwnd;
cds._len = GetWindowModuleFileNameA(pmsg->hwnd, cds._path, COUNTOF(cds._path));
data.dwData = WM_GETMODULEPATH;
data.cbData = sizeof(cds);
data.lpData = &cds;
SendMessage((HWND)pmsg->wParam, WM_COPYDATA, (WPARAM)pmsg->hwnd, (LPARAM)&data);
return 0;
}
return CallNextHookEx(s_hNotifyHook, code, wparam, lparam);
}
UINT InstallNotifyHook()
{
s_hNotifyHook = SetWindowsHookEx(WH_GETMESSAGE, NotifyHookProc, s_hInstance, 0);
return WM_GETMODULEPATH;
}
void DeinstallNotifyHook()
{
UnhookWindowsHookEx(s_hNotifyHook);
s_hNotifyHook = 0;
}
void GetWindowModulePath(HWND hwnd)
{
SendMessage(hwnd, WM_GETMODULEPATH, 0, 0);
}
// retrieve module path by receiving WM_COPYDATA message
DECL_NOTIFYHOOK int GetWindowModulePathCopyData(LPARAM lparam, HWND* phwnd, LPSTR buffer, int size)
{
PCOPYDATASTRUCT data = (PCOPYDATASTRUCT) lparam;
if (data->dwData == WM_GETMODULEPATH) {
struct COPYDATA_STRUCT* cds = (struct COPYDATA_STRUCT*) data->lpData;
*phwnd = cds->_hwnd;
lstrcpyn(buffer, cds->_path, size);
return cds->_len;
} else
return 0;
}