I use a hook function, but can't get the file
Qt load the DLL, the DLL in the set of hook:

Install hooks is written so

 
G_hDesktopWnd=: : FindWindow ((LPCWSTR) "Progman", NULL); 
If (NULL==g_hDesktopWnd) 
{
OutputDebugString (L "Can not find the desktop window handle"); 
G_hDesktopWnd=FindShellWindow (); 
If (NULL==g_hDesktopWnd) 
Return FALSE; 
} 
DWORD targetThreadid=GetWindowThreadProcessId (g_hDesktopWnd, NULL); 
G_Hook=SetWindowsHookEx (WH_GETMESSAGE GetMsgProc, g_Inst, targetThreadid); 

Desktop mouse and keyboard has been on the news, but access to the file is less than,

 
LRESULT a CALLBACK GetMsgProc (int code, WPARAM WPARAM, LPARAM LPARAM) 
{
LParam MSG * pMsg=(MSG *); 
If (NULL!=pMsg & amp; & PMsg - & gt; The HWND!=NULL) 
{
Cout<" Message==============="& lt; The switch (pMsg - & gt; Message) 
{
Case WM_LBUTTONUP: 
HWND hDeskTop=0; 
HDeskTop=: : FindWindowEx (hDeskTop, 0, (LPCWSTR) "Progman", NULL); 
HDeskTop=: : FindWindowEx (hDeskTop, 0, (LPCWSTR) "SHELLDLL_DefView", NULL); 
HDeskTop=: : FindWindowEx (hDeskTop, 0, (LPCWSTR) "SysListView32", NULL); 
Char buf [100]={0}; 
ListView_GetItemText (hDeskTop, 1, 0, buf LPWSTR, 100); 

Int TotalNum=ListView_GetItemCount (hDeskTop); 
Sprintf (buf, "% d", TotalNum); 
MessageBoxA (NULL, buf, "tip", MB_OK); 
break; 
} 
} 
Return: : CallNextHookEx (g_Hook, code, wParam, lParam); 

ListView_GetItemText and ListView_GetItemCount couldn't get anything,
Using spy++ see


Have a great god help me to look at ah, where is the problem