我想向各位请教一个关于获得窗口标题的问题, 不过只是针对部分窗口出现错误, 望高手指教. 我使用方法1:
ZeroMemory(szWndTitle, sizeof(szWndTitle));
GetWindowText(hWnd, szWndTitle, sizeof(TCHAR)*MAX_PATH);
或SendMessage(hWnd, WM_GETTEXT, (WPARAM)MAX_PATH, (LPARAM)szWndTitle);
打开有些窗口后,再调用本函数发现会卡在此处GetWindowText(), 不直不会向下运行. 使用方法2:
ZeroMemory(szWndTitle, sizeof(szWndTitle));
LONG lWindowLong = GetWindowLong(hWnd,GWLP_WNDPROC);
CallWindowProc((WNDPROC)lWindowLong,hWnd,WM_GETTEXT,(WPARAM)sizeof(TCHAR)*MAX_PATH,(LPARAM)szWndTitle);
打开有些窗口后,再调用本函数CallWindowProc(), 发现会出现微软提供的BUG "C:\Program Files\Microsoft Visual Studio 8\VC\atlmfc\src\mfc\wincore.cpp"第442行出现错误, 查看则是RemoveProp(hWnd, _afxOldWndProc); . 使用方法3(根据方法2微软提供的BUG进行修正):
WNDPROC oldWndProc = (WNDPROC)::GetProp(hWnd, _T("AfxOldWndProc423"));
CallWindowProc(oldWndProc, hWnd, WM_GETTEXT, (WPARAM)sizeof(TCHAR)*MAX_PATH,(LPARAM)szWndTitle);
SetWindowLong(hWnd, GWLP_WNDPROC, reinterpret_cast <INT_PTR>(oldWndProc));
RemoveProp(hWnd, _T("AfxOldWndProc423"));
GlobalDeleteAtom(GlobalFindAtom(_T("AfxOldWndProc423"))); //if(wcslen(szWndTitle) <= 0)
//{
// SetWindowLong(hWnd, GWLP_WNDPROC, reinterpret_cast <INT_PTR>(WindowLong));
// GetWindowText(hWnd, szWndTitle, sizeof(TCHAR)*MAX_PATH); //使用此段时会卡住. 不使用此段时不会获得窗口标题.
//}
ZeroMemory(szWndTitle, sizeof(szWndTitle));
GetWindowText(hWnd, szWndTitle, sizeof(TCHAR)*MAX_PATH);
或SendMessage(hWnd, WM_GETTEXT, (WPARAM)MAX_PATH, (LPARAM)szWndTitle);
打开有些窗口后,再调用本函数发现会卡在此处GetWindowText(), 不直不会向下运行. 使用方法2:
ZeroMemory(szWndTitle, sizeof(szWndTitle));
LONG lWindowLong = GetWindowLong(hWnd,GWLP_WNDPROC);
CallWindowProc((WNDPROC)lWindowLong,hWnd,WM_GETTEXT,(WPARAM)sizeof(TCHAR)*MAX_PATH,(LPARAM)szWndTitle);
打开有些窗口后,再调用本函数CallWindowProc(), 发现会出现微软提供的BUG "C:\Program Files\Microsoft Visual Studio 8\VC\atlmfc\src\mfc\wincore.cpp"第442行出现错误, 查看则是RemoveProp(hWnd, _afxOldWndProc); . 使用方法3(根据方法2微软提供的BUG进行修正):
WNDPROC oldWndProc = (WNDPROC)::GetProp(hWnd, _T("AfxOldWndProc423"));
CallWindowProc(oldWndProc, hWnd, WM_GETTEXT, (WPARAM)sizeof(TCHAR)*MAX_PATH,(LPARAM)szWndTitle);
SetWindowLong(hWnd, GWLP_WNDPROC, reinterpret_cast <INT_PTR>(oldWndProc));
RemoveProp(hWnd, _T("AfxOldWndProc423"));
GlobalDeleteAtom(GlobalFindAtom(_T("AfxOldWndProc423"))); //if(wcslen(szWndTitle) <= 0)
//{
// SetWindowLong(hWnd, GWLP_WNDPROC, reinterpret_cast <INT_PTR>(WindowLong));
// GetWindowText(hWnd, szWndTitle, sizeof(TCHAR)*MAX_PATH); //使用此段时会卡住. 不使用此段时不会获得窗口标题.
//}
CWnd*->GetWindowText(strTitle);如:CString strTitle;
this->GetWindowText(strTitle);
还有程序不是MFC写的.
察看MSDN:
GetWindowText cannot retrieve the text of a control in another application.
我猜想你获取的不是本进程的窗口标题,那就只能使用SendMessage来获取了。
至于你使用的方法2,3由于不是本进程所以你获取的窗口过程地址也将会是无效的,所以直接使用SendMessage即可。
也会卡住???最多也就是返的标题不正确吧?某些程序是指哪些?
还是一样会卡住.
和
GetWindowText
应该可行的,一直在使用这个,没有发现问题。。
LZ能所说哪些窗体是出现了问题吗?让大家也做个参考。。
HANDLE hEvent = NULL;
HANDLE hThread = NULL;
WNDTEXT wndtext;ZeroMemory(&wndtext,sizeof(WNDTEXT));
hEvent = CreateEvent(NULL,FALSE,FALSE,NULL);
if( hEvent == NULL )
return TRUE;wndtext.hWnd = hWnd;
wndtext.hEvent= hEvent;
hThread = CreateThread(NULL,0,ThreadWndProc,(LPVOID)&wndtext,0,NULL);
if( hThread == NULL )
{
CloseHandle(hEvent);
hEvent = NULL;
return TRUE;
}
dwEvent = WaitForSingleObject(hEvent,1000);
switch(dwEvent)
{
case WAIT_OBJECT_0:
wcscpy(szWndTitle,wndtext.szTitle);
break;
case WAIT_TIMEOUT:
case WAIT_FAILED:
TerminateThread(hThread,0);
break;
}
if(hThread)
{
CloseHandle(hThread);
hThread = NULL;
}
if(hEvent)
{
CloseHandle(hEvent);
hEvent = NULL;
}
HANDLE hEvent = NULL;
HANDLE hThread = NULL;
WNDTEXT wndtext;ZeroMemory(&wndtext,sizeof(WNDTEXT));
hEvent = CreateEvent(NULL,FALSE,FALSE,NULL);
if( hEvent == NULL )
return TRUE;wndtext.hWnd = hWnd;
wndtext.hEvent= hEvent;
hThread = CreateThread(NULL,0,ThreadWndProc,(LPVOID)&wndtext,0,NULL);
if( hThread == NULL )
{
CloseHandle(hEvent);
hEvent = NULL;
return TRUE;
}
dwEvent = WaitForSingleObject(hEvent,1000);
switch(dwEvent)
{
case WAIT_OBJECT_0:
wcscpy(szWndTitle,wndtext.szTitle);
break;
case WAIT_TIMEOUT:
case WAIT_FAILED:
TerminateThread(hThread,0);
break;
}
if(hThread)
{
CloseHandle(hThread);
hThread = NULL;
}
if(hEvent)
{
CloseHandle(hEvent);
hEvent = NULL;
}