I have this BHO in C++ that I'm writing,
Basically what I'm trying to do is open a window, but it is not shown, I think it might have something to do with the HINSTANCE I passed to it. This is the code I use, anyone recognizing what's not right in this snippet?
Thanks :)
IServiceProvider* pServiceProvider = NULL;
if (SUCCEEDED(m_pWebBrowser->QueryInterface(
IID_IServiceProvider,
(void**)&pServiceProvider)))
{
IOleWindow* pWindow = NULL;
if (SUCCEEDED(pServiceProvider->QueryService(
SID_SShellBrowser,
IID_IOleWindow,
(void**)&pWindow)))
{
HWND hwndBrowser = NULL;
if (SUCCEEDED(pWindow->GetWindow(&hwndBrowser)))
{
HWND g_hwndMain;
g_hwndMain = CreateWindow(TEXT ("AnxJTest Class"),TEXT("My Window"),WS_POPUP | WS_VISIBLE,0, 0, 200, 300,NULL, NULL, (HINSTANCE)hwndBrowser, NULL);
ShowWindow(g_hwndMain, SW_SHOW);
}
pWindow->Release();
}
pServiceProvider->Release();
}
Related
this is just a minimalist console application that should show a windows created on the fly :
#include <windows.h>
void main()
{
WNDCLASSEX _c4w = {0};
_c4w.cbSize = sizeof(WNDCLASSEX);
//_c4w.hCursor = ::LoadCursor(0, IDC_APPLICATION);
//_c4w.hIcon = ::LoadIcon(0, IDI_APPLICATION);
_c4w.hInstance = 0;
_c4w.hbrBackground = (HBRUSH)(COLOR_BACKGROUND);
_c4w.lpszClassName = "c4w";
HWND _h;
if(!::RegisterClassEx(&_c4w))
{ _h = ::CreateWindowEx( 0, "c4w",
"Minimal Windows Application",
WS_OVERLAPPEDWINDOW | WS_VISIBLE,
0, 0, 640, 480,
HWND_DESKTOP,
0,
::GetModuleHandle(0), NULL
);
::ShowWindow(_h, SW_SHOW);
}
....
}
unfortunatlity the RegisterClassEx function actually always fails...
I am using C++ Builder 5 and compiling a console Application optioned as MultiThreaded but no VCL...
As #WhozCraig said Your window class doesn't have a wndproc. If you want to use winapi well, please study according to the official documentation. Your program needs a wndproc.
Here is how to create a blank window in MSDN.
Notice that the program does not explicitly call the WindowProc
function, even though we said this is where most of the application
logic is defined. Windows communicates with your program by passing it
a series of messages.
In the code, wc.lpfnWndProc = WindowProc specifies the process callback function.
I understood that a normal Win32 application using HWND and WNDPROC is not what I have done, but here is my solution :
HWND GetSTD()
{ static
HWND _result(0);
static
bool _lock(false);
static
bool _setup(false);
while(_lock) ::Sleep(0);
if(_setup == false)
{ _lock = true;
OSVERSIONINFO _os;
_os.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
::GetVersionEx(&_os);
if(_os.dwPlatformId != VER_PLATFORM_WIN32s)
{ char _title[1024];
::GetConsoleTitle(_title, sizeof(_title));
_result = ::FindWindow(0, _title);
if(_os.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS)
{ _result = ::GetWindow(_result, GW_CHILD);
if(_result != 0)
{ char _class[128];
::GetClassName(_result, _class, sizeof(_class));
while(::strcmp(_class, "ttyGrab") != 0)
{ _result = ::GetNextWindow(_result, GW_HWNDNEXT);
if(_result != 0)
::GetClassName(_result, _class, sizeof(_class));
}
}
}
}
_setup = true;
_lock = false;
}
return _result;
}
Using the resulting HWND, we could draw over the console with the ::GetDC() and ::ReleaseDC() mechanism...
NB : static variables are used to ensure to return only 1 STD handle per call...
I am trying to obtain handle to SHELLDLL_DefView.
So, I have this code.
HWND hProgman = FindWindow(L"Progman", NULL);
HWND hWnd = FindWindowEx(hProgman, 0, L"SHELLDLL_DefView", NULL);
Eveyrtihing works OK, until I change in Windows desktop brackground to slideshow. Then when I search with spy++ hierarchy of the windows, than SHELLDLL_DefView has another parent. Now it is #32769 (Desktop) -> WorkerW -> SHELLDLL_DefView. So I can't find it. Problem is that when I try
HWND desktop = GetDesktopWindow();
HWND hWnd = FindWindowEx(desktop , 0, L"WorkerW", NULL);
HWND hWnd = FindWindowEx(hWnd, 0, L"SHELLDLL_DefView", NULL);
Than SHELLDLL_DefView is not found. WorkerW yes.
Can anybody help?
Your code only works on some Windows versions as "SHELLDLL_DefView" can be found under "WorkerW" or "Progman" and as you discovered there can be many windows under the "WorkerW" class (normal in Win7).
Microsoft Docs report EnumWindows() is more reliable than calling GetWindow()/FindWindowEx() functions in loops, so more universal code (tested on Windows 98/Windows 7) would look like this (say you want to refresh the desktop):
BOOL CALLBACK EnumWindowsProc(HWND hwnd, LPARAM lParam) {
HWND hNextWin;
hNextWin = FindWindowExA(hwnd, 0, "SHELLDLL_DefView", 0);
if ( hNextWin ) {
// The correct desktop shell window under Progman/WorkerW will have only 1 child window!
if ( GetNextWindow(hNextWin, GW_HWNDNEXT) || GetNextWindow(hNextWin, GW_HWNDPREV) )
return true;
// We found correct handle
PostMessageA(hNextWin, WM_KEYDOWN, VK_F5, 0);
return false;
}
return true;
}
void main() {
EnumWindows(&EnumWindowsProc, 0);
}
I found the answer. Need to iterate through all WorkerW.
HWND destop = GetDesktopWindow();
HWND hWorkerW = NULL;
HWND hShellViewWin = NULL;
do
{
hWorkerW = FindWindowEx(destop, hWorkerW, L"WorkerW", NULL);
hShellViewWin = FindWindowEx(hWorkerW, 0, L"SHELLDLL_DefView", 0);
} while (hShellViewWin == NULL && hWorkerW != NULL);
I haven't been able to find a concise chunk of code that allows me to add/display tooltips to a CStatic (and CLed) control. Obviously, the standard code to do so does not apply for this type of control. Can someone post code snippets?
I hope this code will solve your problem .One important thing make NOTIFY property of CStatic =TRUE.
if( !m_ToolTip.Create(this))
{
TRACE0("Unable to create the ToolTip!");
}
else
{
CWnd* pWnd = GetDlgItem(IDC_STATIC_MASTER_PWD);
m_ToolTip.AddTool(pWnd,"Ok");
m_ToolTip.Activate(TRUE);
}
Let me know if any problem.
I don't know if this is still needed, but here's what I used to solve the problem:
just add SS_NOTIFY to dwStyle when creating the static label. (or simply set "Nofity" "True" in the properties). That worked fine for me.
When I add CStatic on Dialog based autocreated mfc application, tooltips don't show until I add RelayEvent in pretranslate dialog message
BOOL CTooltipStaticDlg::PreTranslateMessage(MSG* pMsg)
{
m_ToolTip.RelayEvent(pMsg);
return CDialog::PreTranslateMessage(pMsg);
}
I've had success with multiline tooltips using this simple class:
Create a class for ToolTips:
class ToolTip
{
public:
static HWND CreateToolTip(int toolID, HWND hDlg, UINT id);
};
Next, implement a tooltip creation function:
HWND ToolTip::CreateToolTip(int toolID, HWND hDlg, UINT id)
{
if (!toolID || !hDlg || !id)
{
return FALSE;
}
CString strTTText;
strTTText.LoadString( id );
// Get the window handle of the control to attach the TT to.
HWND hwndTool = ::GetDlgItem(hDlg, toolID);
// Create the tooltip window
HWND hwndTip = CreateWindowEx(NULL, TOOLTIPS_CLASS, NULL,
WS_POPUP |TTS_ALWAYSTIP,// | TTS_BALLOON,
CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT,
hDlg, NULL,
AfxGetInstanceHandle() , NULL);
if (!hwndTool || !hwndTip)
{
return (HWND)NULL;
}
// Associate the tooltip with the tool.
TOOLINFO toolInfo = { 0 };
toolInfo.cbSize = sizeof(toolInfo);
toolInfo.hwnd = hDlg;
toolInfo.uFlags = TTF_IDISHWND | TTF_SUBCLASS;
toolInfo.uId = (UINT_PTR)hwndTool;
toolInfo.lpszText = (char*)(LPCTSTR)strTTText;
::SendMessage(hwndTip, TTM_ADDTOOL, 0, (LPARAM)&toolInfo);
::SendMessageA(hwndTip, TTM_SETMAXTIPWIDTH, 0, 40); // force multi-line
return hwndTip;
}
Call it somewhere in your InitDialog:
CMyDialog::InitDialog()
{
ToolTip::CreateToolTip( PickAUniqueNumber, m_hWnd, IDS_MY_RESOURCE_STRING );
}
I've had on my dialog label with assigned custom ID IDC_PATH. I needed to turn on Notify flag (SS_NOTIFY) of the label and I needed to overload CWnd method OnToolHitTest and handle tooltip hit test like this:
INT_PTR CPath::OnToolHitTest(CPoint point, TOOLINFO* pTI) const
{
INT_PTR r = CWnd::OnToolHitTest(point,pTI);
this->ClientToScreen(&point);
CRect rcLbl;
GetDlgItem(IDC_PATH)->GetWindowRect(&rcLbl);
if( rcLbl.PtInRect(point) )
{
pTI->uFlags |= TTF_IDISHWND;
pTI->uFlags &= ~TTF_NOTBUTTON;
pTI->uId = (UINT_PTR)GetDlgItem(IDC_PATH)->m_hWnd;
return IDC_PATH;
}
return r;
}
Then my dialog started to receive TTN_NEEDTEXT notification, which I handled and dynamicaly set text for tooltip.
BOOL CPath::OnTtnNeedText(UINT id, NMHDR *pNMHDR, LRESULT *pResult)
{
UNREFERENCED_PARAMETER(id);
TOOLTIPTEXT *pTTT = (TOOLTIPTEXT *)pNMHDR;
UINT_PTR nID = pNMHDR->idFrom;
BOOL bRet = FALSE;
if (pTTT->uFlags & TTF_IDISHWND)
{
// idFrom is actually the HWND of the tool
nID = ::GetDlgCtrlID((HWND)nID);
if(nID == IDC_PATH)
{
pTTT->lpszText = (LPSTR)(LPCTSTR)m_FullDestPath;
bRet = TRUE;
}
}
*pResult = 0;
return bRet;
}
in my application i have timer, in TimerProc i want to get handles of all windows(main and child) of the another application that has focus. I have no idea how to do that because i don't understand functions like GetNextWindow or GetParent and Z-oder of windows and i can't find anywhere very detailed explanation of how this functions works(i dont understand explanation on msdn). Please can you give me some advice or block of code which do that? Many thanks for answer.
Use GetForegroundWindow() function - it returns the HWND of the window the user currently is working with.
Then having this handle you can retrieve childs in such a way:
HWND a_hWnd = (HWND)hParent;
HWND a_FirstChild = NULL;
a_FirstChild = ::GetWindow(a_hWnd, GW_CHILD);
if (a_FirstChild != NULL)
{
HWND a_NextChild = NULL;
do
{
a_NextChild = ::GetWindow(a_FirstChild, GW_HWNDNEXT);
if (a_NextChild != NULL)
{
a_FirstChild = a_NextChild;
}
}
while (a_NextChild != NULL);
}
GetForeGroundWindow to get the current foreground window/dialog
GetParent until you get NULL (that gets you to the top level window)**
EnumChildWindows to get to all the dependent windows
** Note that an application can have more than one top level window, though this isn't usual.
Code:
void Ccpp_testDlg::DoWalk ()
{
HWND hCurrent;
HWND hNew;
hCurrent = ::GetForegroundWindow ();
hNew = hCurrent;
while (hNew != NULL)
{
hNew = ::GetParent (hCurrent);
if (hNew != NULL)
{
hCurrent = hNew;
}
}
EnumChildWindows (hCurrent, EnumProc, 0);
}
BOOL CALLBACK EnumProc (HWND hwnd,LPARAM lParam)
{
TCHAR szText [MAX_PATH];
GetWindowText (hwnd, szText, sizeof(szText));
// do something with text
return TRUE;
}
When I try to instantiate a CFileDialog object it shows both the folders and files. How do you create a CFileDialog that browses for folders alone?
It is very simple, really.
Use CFolderPickerDialog which is derived from the class CFileDialog!
You can't do it with CFileDialog.
Either you will use SHBrowseForFolder Function or a wrapper for it, like CFolderDialog - Selecting Folders.
Starting from Vista it's recommended to use IFileDialog with the FOS_PICKFOLDERS option (see msdn):
CFileDialog od(TRUE/*bOpenFileDialog*/, NULL, NULL,
OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT , NULL, NULL, 0,
TRUE/*bVistaStyle*/);
IFileOpenDialog * openDlgPtr = od.GetIFileOpenDialog();
if ( openDlgPtr != NULL )
{
openDlgPtr->SetOptions(FOS_PICKFOLDERS);
openDlgPtr->Release();
}
od.DoModal();
Like someone mentioned, use CFolderPickerDialog which works great. I would like to give you example how to use it especially when using the multi select flag:
CFolderPickerDialog folderPickerDialog(initialFolder, OFN_FILEMUSTEXIST | OFN_ALLOWMULTISELECT | OFN_ENABLESIZING, this,
sizeof(OPENFILENAME));
CString folderPath;
if (folderPickerDialog.DoModal() == IDOK)
{
POSITION pos = folderPickerDialog.GetStartPosition();
while (pos)
{
folderPath = folderPickerDialog.GetNextPathName(pos);
}
}
starting from windows vista,you can use the Common Item Dialog .
void CQiliRegrvDlg::OnBnClickedSelectDir()
{
HRESULT hr = S_OK;
// Create a new common open file dialog.
IFileOpenDialog *pfd = NULL;
hr = CoCreateInstance(CLSID_FileOpenDialog, NULL, CLSCTX_INPROC_SERVER,
IID_PPV_ARGS(&pfd));
if (SUCCEEDED(hr))
{
// Set the dialog as a folder picker.
DWORD dwOptions;
hr = pfd->GetOptions(&dwOptions);
if (SUCCEEDED(hr))
{
hr = pfd->SetOptions(dwOptions | FOS_PICKFOLDERS);
}
// Set the title of the dialog.
if (SUCCEEDED(hr))
{
hr = pfd->SetTitle(L"Folder");
}
// Show the open file dialog.
if (SUCCEEDED(hr))
{
hr = pfd->Show(m_hWnd);
if (SUCCEEDED(hr))
{
// Get the selection from the user.
IShellItem *psiResult = NULL;
hr = pfd->GetResult(&psiResult);
if (SUCCEEDED(hr))
{
PWSTR pszPath = NULL;
hr = psiResult->GetDisplayName(SIGDN_FILESYSPATH, &pszPath);
if (SUCCEEDED(hr))
{
m_appDir = pszPath;
SetDlgItemText(IDC_STATIC, m_appDir);
CoTaskMemFree(pszPath);
}
psiResult->Release();
}
}
}
pfd->Release();
}
}
Seems to me the answer you are asking for is inside the code of
CMFCPropertyGridFileProperty::OnClickButton(CPoint /*point*/)
of the
<Your Visual Studio installation folder>\VC\atlmfc\src\mfc\afxpropertygridctrl.cpp
file.
If you do not have access to the code, I will post the essential part of it:
CString strPath = m_varValue.bstrVal;
BOOL bUpdate = FALSE;
if (m_bIsFolder)
{
if (afxShellManager == NULL)
{
CWinAppEx* pApp = DYNAMIC_DOWNCAST(CWinAppEx, AfxGetApp());
if (pApp != NULL)
{
pApp->InitShellManager();
}
}
if (afxShellManager == NULL)
{
ASSERT(FALSE);
}
else
{
bUpdate = afxShellManager->BrowseForFolder(strPath, m_pWndList, strPath);
}
}
else
{
CFileDialog dlg(m_bOpenFileDialog, m_strDefExt, strPath, m_dwFileOpenFlags, m_strFilter, m_pWndList);
if (dlg.DoModal() == IDOK)
{
bUpdate = TRUE;
strPath = dlg.GetPathName();
}
}
As you see, Microsoft itself does not use the Cfiledialog class when wants to open a dialog for picking folders.
For using code like that, your application class MUST be derived from CWinAppEx, not CWinApp
Actually there is a way to do this - I found it in codeguru: "Selected files and folders in CFileDialog"
If you are willing to make your own implementation of CFileDialog such as:
class CMyFileDialog : public CFileDialog
You can add the following code and it should work (It is slightly different from the codeguru example):
// This code overrides the OnNotify message of the CFileDialog
// and catches the CDN_SELCHANGE, this way you can also do
// something with the selected folders.
BOOL CMyFileDialog::OnNotify(WPARAM wParam, LPARAM lParam, LRESULT* pResult)
{
NMHDR* pNotificationParam = (NMHDR*)lParam;
// Check that we got to the selection change notification.
int code = pNotificationParam->code;
if (code == CDN_SELCHANGE)
{
CStringArray theSelection;
GetListControllSelectedItems(theSelection);
// Do as you want with theSelection.
}
return CFileDialog::OnNotify(wParam, lParam, pResult);
}
// The following Code is accessing the selection in the CFileDialog
// and filling a string array with the selected names
BOOL CMyFileDialog::GetListControllSelectedItems(CStringArray& selectedItemNames)
{
BOOL rc = FALSE;
// Get the list control of the file dialog.
CWnd* pParentWnd = GetParent();
CWnd* pListControlWnd = pParentWnd->GetDlgItem(lst2);
if (pListControlWnd) {
// Get the selection from the list control.
CListCtrl* pListCtrl = (CListCtrl*)(pListControlWnd->GetDlgItem(1));
UINT selectionCount = pListCtrl->GetSelectedCount();
// When there are items selected.
if (selectionCount) {
rc = TRUE;
selectedItemNames.RemoveAll();
POSITION itemPos = pListCtrl->GetFirstSelectedItemPosition();
while (itemPos != NULL)
{
int itemNum = pListCtrl->GetNextSelectedItem(itemPos);
CString currentItemName = pListCtrl->GetItemText(itemNum, 0);
selectedItemNames.Add(currentItemName);
}
}
}
return rc;
}
Note: In CFileDialog::OnFileNameChange of the Microsoft MFC documentation they actually do hint toward this solution, but without elaborating too much.
I had a problem in my very old, legacy code, where I have a customized file dialog that actually needs to save a folder!!!
After twenty two years of hardship and pain, my code is now complete...