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Hi,
I like ask you about an issue with the threads...
I'm working in a GUI app with threads what creates windows (2 threads & 2 windows) and i don't know how manage their respective message loops;
I was created a loop for each window...
but the trouble is when the second window (a child window in the surface of the first window) is refreshed, more exactly when i drag it to an area non visible of the screen (coords -50x, -50y f.e.) and then i drag it to an visible area, the window have vertical lines with the parent window color, and i don't know how i can solve it... ((
Please if someone cal help my I'll thank you
PS: I'm not english forgive me my bad english
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Hi,
Have a look at this article
http://www.codetools.com/threads/usinguithreads.asp
Sujan
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Hi Sujan,
Thank you for your answer.
I had do how you told me, but I'm trying to do it without the MFC, the trouble is what i've refresh problems in the child window, i think what it's because i must wait in the message loop, with any function as WaitForMultipleObjects as the MSDN says, but i don't know how i can implement it, i really want to know how i can solve that problem 
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You need to use MsgWaitForMultipleObjects and when you get messages, they are processed by your message loop. If you only use WaitForMultipleObjects, then when WM_PAINT and other messages show up for your second window, they are not processed until your thread is unblocked by some other event it was waiting upon. You can look at the MFC code to see how they do this with their main message pumping loops, and you could mimic something like that.
Otherwise, when you get WAIT_OBJECT_0 + nCount you need to process messages with GetMessage, TranslateMessage and DispatchMessage.
This way, your thread either waits on one of its events, or unblocks when messages are available for the window to process.
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Thank you Blake, now excuse me, but can you explain me what are the objects what i'must put in the 2nd argv.
Please!!! i don,t understand too much about how it works.
What i must create to take the respective handle??
Thanks
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The first argument is how many handles are in the array passed to the second argument.
The handles are handles to 'waitable' objects such as mutex, event, semaphore, thread handle, process handle, etc.
The MsgWaitForMultipleObjectsEx function can specify handles of any of the following object types in the pHandles array: Event,Mutex, Critical section, Semaphore, Process, Thread
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Blake,
then you are trying to tell me what i can use the handle of the first thread for this function, no??
amonng another things what i can use?
Please can you give me an example of that please!!!
I'm to much grateful, THANK YOU!!!
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If you are waiting on a thread or process handle, they are not 'signaled' until the thread or process exits. You can wait on a process handle from a call to CreateProcess, for exmaple, to detect that the created process has terminated. If the main thread of oyur program creates one or more secondary threads, you can put the thread handles into an array, and be 'signaled' when one of the threads exits. However, since you said your thread also made a window, you need to use MsgWaitForMultipleObjects so that your thread can process the window messages.
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Excuse me again...
But if i've 3 threads and these 3 threads creates windows with their own message loop; how can i implement it in the loops of these windows, because if i'm not mistaken these threads never ends and so their never will be signaled, then i must create a timer or another thing but which is the best option to use?
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One of the handles the MsgWaitForMultipleObjects waits upon can be an event that the main thread of your progrma will set. When each event is signaled, then each thread can post a WM_CLOSE to its window. When the window closes, the thread detects that (maybe the window sets a thread-specific variable) and then the thread exits. When all threads have exited, then the main progrma thread will exit. The main program thread can be waiting for the thread handles to be signaled, indicating the working threads have all exited. That is why they have MsgWaitForMultipleObjects, so you can have several different signals a thread is waiting for. You need to have the worker thread waiting for its 'do the work' signal (if there is one, otherwise it is just servicing the window) and at least wait on an event that the main thread sets to let the working thread know to exit.
When the working thread is processing the messages, using GetMessage, TranslateMessage, and DispatchMessage, the message will reach the correct window, so you don't have to worry about that.
Another way to get a thread to exit is to use PostThreadMessage, if you know the thread is processing messages, and you can post a specifc message that the thread can intercept to know it is time to exit. You can tell it is a thread-targeted message when you call GetMessage, because the 'hwnd' member of the MSG data structure will be NULL.
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How do I do this? I have an application that uses GetCursorPos() to get the current mouse position, but I want to send it my own coordinates.
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Is this what you are looking for? 
SetCursorPos(int x, int y);
humpa humpa
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No, I don't want to just do SetCursorPos (unless I did it inside of GetCursorPos, but that would be pointless) because the application calls it very often, and that results in the mouse shaking.
EDIT: Don't worry about the shaking, all I want to know is how to hook GetCursorPos()
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Nevermind, I figured it out on my own.. I just had to hook GetProcAddress and check if the proc was "GetCursorPos", then save the pointer to the origonal and return mine.
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As the subject said, I´m having troubles with my dialogbox. I cant move it  .
This is what I´ve written:
IDD_DIALOG1 DIALOGEX 0, 0, 196, 102
STYLE DS_SETFONT | DS_FIXEDSYS | WS_POPUP | WS_CAPTION
CAPTION "Dialog"
FONT 8, "MS Shell Dlg", 400, 0, 0x1
BEGIN
DEFPUSHBUTTON "OK",IDOK,139,7,50,14
PUSHBUTTON "Cancel",IDCANCEL,139,24,50,14
END
----------------------------------
WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR CmdLine, int CmdShow)
{
...
DialogBox(GetModuleHandle(NULL), MAKEINTRESOURCE(IDD_DIALOG1), hWnd, (DLGPROC)DlgProc);
...
}
----------------------------------
bool CALLBACK DlgProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch(msg)
{
case WM_INITDIALOG:
return true;
case WM_MOVE:
break;
case WM_COMMAND:
{
switch(LOWORD(wParam))
{
case IDOK:
EndDialog(hWnd,0);
return TRUE;
case IDCANCEL:
break;
}
break;
}
default:
return false;
}
return true;
}
I can use the buttons and shutdown the dialogbox. As I said, I just cant move it.
I´m using VS.NET 2003, any suggestions would be helpful.
Thanks.
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If you don't handle a message, you should be calling [edit]DefWindowProc()[/edit] to allow Windows to perform default processing for the message. In your case, the problem is probably because Windows doesn't get a chance to handle WM_NCLBUTTONDOWN or WM_NCHITTEST, so it doesn't have a chance to allow the user to move the window.
[edit]Sorry, don't use DefDlgProc() from inside your dialog box procedure. Infinite recursion followed by a program crash will probably result. Use DefWindowProc() instead[/edit]
Ryan "Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"
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Look at what your dialog proc is doing when it receives WM_MOVE. It does nothing, then returns true, which means that you handled the message. Since you did nothing, nothing happens.  Return FALSE instead to let the system do the default behavior for that message.
BTW, the dialog proc return value is a BOOL, not bool. This is important for messages that return more than just a flag such as WM_CTLCOLOR*
--Mike--
Personal stuff:: Ericahist | Homepage
Shareware stuff:: 1ClickPicGrabber | RightClick-Encrypt
CP stuff:: CP SearchBar v2.0.2 | C++ Forum FAQ
----
I even hear the Windows "OMG I booted up fine" sound.
-- Paul Watson diagnosing hardware problems.
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Hi Everybody,
I developed an application Using Embedded VisualVC++ 4.0 and Windows CE.
In my application, I would like to add Rounded Shape or any irregular shape dialogs.
In Windows2000 most of the functions support the same.
Can anyone know to make a dialog as rounded shape in Windows CE?
Please answer my question.
Thanks inadvance,
pandi.
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Just create a non rectangular region and assign it to the CDialog window...
Since CreateEllipticRgn is not supported on Windows CE you`ll have to create rounded shaped regions yourself by combining rectangular regions.
I did it in a Win32 application I designed in Windows CE4.0 for an ARM device and a MIPS device and it worked beautifully! Offcourse it isn^t MFC but I guess the procedure is the same!
Greetz,
Davy
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Hi Davy,
Thanks for your reply.
How can i create rounded shaped regions by combining rectangular regions?
Please answer to my question.
Thanks inadvance,
Pandi.
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void DW::OnSubmit()
{
typedef char INFO[225];
INFO ALL[6];
CFile UTP;
CString k;
CEdit *GTINFO[6];
GTINFO[0]=(CEdit*) GetDlgItem(IDC_EDIT1);
UTP.Open("C:\\az.qiz",CFile::modeReadWrite|CFile::modeNoTruncate);
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//++++++++++++++++++GET TEXT+++++++++++++++++++++++++++++++++++++++++
GTINFO[0]->GetWindowText(ALL[0],(GTINFO[0]->GetWindowTextLength()+1));
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//++++++++++++++++++++++++++++WRITE TO FILE+++++++++++++++++++++
k.Insert(k.GetLength()+1,ALL[0]);
k.Insert(0,"\r\n");
UTP.Write(k,k.GetLength());
MessageBox(k,"test",MB_OK); //this worked
///}
}
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Man, your commenting style is damn ugly.
None of this code does any checking, it all just assumes that it works. In the absence of any comments as to what happens when it fails, it's kind of hard to help.
Christian
I have several lifelong friends that are New Yorkers but I have always gravitated toward the weirdo's. - Richard Stringer
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You've not provided any useful information. For example:
What doesn't work?
Does it compile/link okay?
Are any assertions fired?
Are any exceptions thrown?
Have you stepped through the code to see which line is in error?
What value(s) do the variables have as you step through the code?
"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen
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GTINFO[0]->GetWindowText(ALL[0],(GTINFO[0]->GetWindowTextLength()+1));
That's one weird line of code ....
what exacly you want to do ? get the text from all CEdit and write them to to a file ?
Maximilien Lincourt
Your Head A Splode - Strong Bad
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get the string from an edit box and write it to a line in a text file
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