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Buy more RAM ?
I've NEVER had AfxMessageBox fail, what makes you think it's memory related ? When does it happen ?
Christian
The tragedy of cyberspace - that so much can travel so far, and yet mean so little.
"I'm somewhat suspicious of STL though. My (test,experimental) program worked first time. Whats that all about??!?!
- Jon Hulatt, 22/3/2002
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Even for me this is the first time AfxMessageBox fails.
MSDN tells that AfxMessageBox on failure returns 0 and that it is due to no enough memory.
I forgot to mention the scenario.
This messagebox I call from within a thread function(via CreateThread) which takes as its parameter the string to be displayed and I am sure there is no problem with string passing.This I made sure by hard-coding the string just to check whether it works fine with hard-coded string value.But even in that case I got the same problem.
But now I tried using MessageBox API instead of AfxMessageBox.Its working fine.But couldn't get the reason behind the problem.
Thank You.
Yamuna.E.
Yamuna.E.
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It's certainly an odd problem. In the future, TRACE or OutputDebugString will allow you to check a variable value in Debug mode without having to bring up a dialog.
Christian
The tragedy of cyberspace - that so much can travel so far, and yet mean so little.
"I'm somewhat suspicious of STL though. My (test,experimental) program worked first time. Whats that all about??!?!
- Jon Hulatt, 22/3/2002
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Fine Thank You.
Yamuna.E.
Yamuna.E.
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Hi all!
I want to do next: user clicks the button, and Web Browser replaces by richedit control (in a dialog). TROUBLE: after hiding of web browser, its window handle become not valid. Here's a code:
void CCalendarDlg::OnViewEditSwitch()
{
CString strBtnText;
m_btnEditView.GetWindowText(strBtnText);
if(strBtnText == EDIT_BUTTON_TEXT)
{
m_btnEditView.SetWindowText(VIEW_BUTTON_TEXT);
m_Browser.ShowWindow(SW_HIDE);
m_wndRichEdit.ShowWindow(SW_SHOW);
}
else
{
m_btnEditView.SetWindowText(EDIT_BUTTON_TEXT);
m_wndRichEdit.ShowWindow(SW_HIDE);
m_Browser.ShowWindow(SW_SHOW);
}
}
ERROR:
Debug assertion failed here:
BOOL CWnd::ShowWindow(int nCmdShow)
{
ASSERT(::IsWindow(m_hWnd));
if (m_pCtrlSite == NULL)
return ::ShowWindow(m_hWnd, nCmdShow);
else
return m_pCtrlSite->ShowWindow(nCmdShow);
}
Help, please!
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I solve the problem so:
void CCalendarDlg::OnViewEditSwitch()
{
CString strBtnText;
m_btnEditView.GetWindowText(strBtnText);
if(strBtnText == EDIT_BUTTON_TEXT)
{
m_btnEditView.SetWindowText(VIEW_BUTTON_TEXT);
//m_Browser.ShowWindow(SW_HIDE);
m_Browser.SetWindowPos(this, 0, 0, 0, 0,
SWP_NOMOVE | SWP_NOZORDER);
m_wndRichEdit.ShowWindow(SW_SHOW);
}
else
{
CRect rc;
m_wndRichEdit.GetWindowRect(&rc);
::MapWindowPoints(HWND_DESKTOP, *this, (LPPOINT) &rc, 2);
m_btnEditView.SetWindowText(EDIT_BUTTON_TEXT);
m_wndRichEdit.ShowWindow(SW_HIDE);
m_Browser.SetWindowPos(this, 0, 0, rc.Width() , rc.Height(),
SWP_NOMOVE | SWP_NOZORDER);
//m_Browser.ShowWindow(SW_SHOW);
}
}
But I'm interested in problem description... Why handle became invalid?
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Is there anyway to test the DLL generated when creating a method which is to be called via CeRapiInvoke()?? I tried to a a LoadLibrary on it and don't get a handle back.
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what are you trying to do exactily ?
Are you trying to use RAPI, if so you should be linking your software to 'rapi.lib' and include 'rapi.h', these come with the Handheld PC SDK. RAPI is no COM complient.
Regards
Ray
"Je Suis Mort De Rire"
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Well....I'm already using RAPI and it works fine with a PDA. What I was asking was if there is a way to debug DLLs designed to be used in conjuction with CeRapiInvoke(). I could create another DLL project and simply reuse the call but I'm trying to debug the x86 DLL generated by eVC.
Paul
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ive tried both of these, and it still aint working 
//WideCharToMultiByte(0,0,_ip_name,wcslen(_ip_name)+1,tempbuf_ip,256,0,0);
MultiByteToWideChar(CP_ACP, 0, tempbuf_ip, -1, (WCHAR*)_ip_name,256);
this is my code.
char *tempbuf_ip;
WCHAR _ip_name[256];
GetDlgItemText(hwnd, IDC_IP, tempbuf_ip, 256);
//WideCharToMultiByte(0,0,_ip_name,wcslen(_ip_name)+1,tempbuf_ip,256,0,0);
//MultiByteToWideChar(CP_ACP, 0, tempbuf_ip, -1, (WCHAR*)_ip_name,256);
and then _ip_name points to:
if( FAILED( hr = CreateHostAddress( _ip_name ) ) )
{
//blah
}
CreateHostAddress points to a WCHAR*;
HRESULT CreateHostAddress(WCHAR* pwszHost)
-Thanks for any help
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You are trying to convert to BSTR. #include <comutil> ( from memory, or comdef, maybe ? ) and cast to _bstr_t.
Christian
The tragedy of cyberspace - that so much can travel so far, and yet mean so little.
"I'm somewhat suspicious of STL though. My (test,experimental) program worked first time. Whats that all about??!?!
- Jon Hulatt, 22/3/2002
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Well first off, there isn't any memory behind the tempbuf_ip pointer. Try defining tempbuf_ip as char tempbuf_ip [256].
After that,
MultiByteToWideChar(CP_ACP, 0, tempbuf_ip, -1, _ip_name,256);
should work just fine.
Tim Smith
I know what you're thinking punk, you're thinking did he spell check this document? Well, to tell you the truth I kinda forgot myself in all this excitement. But being this here's CodeProject, the most powerful forums in the world and would blow your head clean off, you've got to ask yourself one question, Do I feel lucky? Well do ya punk?
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I usually do this:
#include <atlconv.h>
USES_CONVERSION;
CString data;
m_dataBox.GetWindowText(data);
BSTR bstr = ::SysAllocString (A2W(data));
/moliate
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moliate wrote:
BSTR bstr = A2W(data);
This line is bogus. When you will try to free the memory from the BSTR, your program is likely to crash.
The fact is that a BSTR has its 4 preceding bytes (the bytes before the actual string) specifying the length of the string. So a function expecting a BSTR will likely make your program crash. I suggest to replace with:
BSTR bstr = A2BSTR(data);
and don't forget to ::SysFreeString(bstr)!!
Michel
If I am wrong or said something stupid, I apologize in advance 
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You are absolutly right. I had forgotten the ::SysAllocString in the sample. 
/moliate
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Thanks for all the help guys, got it to work just fine now 
I used _bstr_t. 
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ive tried both of these, and it still aint working
//WideCharToMultiByte(0,0,_ip_name,wcslen(_ip_name)+1,tempbuf_ip,256,0,0);
MultiByteToWideChar(CP_ACP, 0, tempbuf_ip, -1, (WCHAR*)_ip_name,256);
this is my code.
char *tempbuf_ip;
WCHAR _ip_name[256];
GetDlgItemText(hwnd, IDC_IP, tempbuf_ip, 256);
//WideCharToMultiByte(0,0,_ip_name,wcslen(_ip_name)+1,tempbuf_ip,256,0,0);
//MultiByteToWideChar(CP_ACP, 0, tempbuf_ip, -1, (WCHAR*)_ip_name,256);
and then _ip_name points to:
if( FAILED( hr = CreateHostAddress( _ip_name ) ) )
{
//blah
}
CreateHostAddress points to a WCHAR*;
HRESULT CreateHostAddress(WCHAR* pwszHost)
-Thanks for any help
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I suggest:
WCHAR *_ip_name = A2W(tempbuf_ip);
The beauty of this, you don't need to deallocate memory, since A2W uses _alloca.
Anonymous wrote:
char *tempbuf_ip;
WCHAR _ip_name[256];
GetDlgItemText(hwnd, IDC_IP, tempbuf_ip, 256);
This last line of the snippet above is likely to make your program crash since GetDlgItemText expects that tempbuf_ip points to a valid block of memory, which is not the case, unless you took off some code statements from your example.
Michel
If I am wrong or said something stupid, I apologize in advance
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Hi.
I have a CDialog (modal) object. It serves as a progress dialog similar to the one that you see while waiting for EI to finish downloading. Inside the actual dialogbox is a CProgressCtrl object. Right now, the progress bar does not do anything. I tried initializing it like this:
m_MyProgressBar.SetRange(0, 100);
m_MyProgressBar.SetPos(0);
The program crashed when I add the code above. I did *not* create the object. The reason is I did not know the size of the object.
For example, this code comes from Prosise's book:
m_MyProgressBar.Create(WS_CHILD | WS_VISIBLE, rect, this, -);
I added a progressbar via Dialogbox Editor. I need to create the progressbar, but I do not know the actual rectangle of the progressbar I made using Dialogbox Editor.
How you to initialize a progressbar made using Dialog Editor?
Thanks,
Kuphryn
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You don't need to call Create on an object that you added in the Resource Editor, the Framework does that for you automatically. Where are you getting the ASSERT's?
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Okay. Thanks.
You were right. I did not have to create the progressbar. I did, however, override PreCreateWindow() and set the range and position of the progressbar.
Now I need a way to update it from my view class.
Kuphryn
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When do you want to update it?
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Right now, I just want to get it working. To test it out, I want to update it ever 25 milliseconds.
Here is the code:
-----
CMyDialog mDlg;
for (int i = 0; i < 100; ++i)
{
mDlg.SetNewProgressPos(i);
::Sleep(25);
}
if (mDlg.DoModal == IDOK)
{}
-----
// void SetNewProgressPos(int newPos)
// {
// m_MyProgressBar.SetPos(newPos);
// }
The code above does not work though. The program crashes. The code that causes it to crash is this:
// m_MyProgressBar.SetPos(newPos);
I tried calling that function from inside the dialog box as well as outside. That line crashes the program both times.
Kuphryn
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Ok. I see what you are trying to do. You need to create a class for your dialog (by deriving from CDialog. Use Class Wizard), and do all of this in there. None of the controls for your dialog have been created when you are doing your loop. They don't get created until you call DoModal, and they get destroyed by the time DoModal returns. When I say created and destroyed, I don't mean the object gets destroyed. Rather, the Handle to the control that the progress control object wraps is destroyed. And you the functions that you are calling are thin wrappers to API calls using the Handle. Thus the crash.
So, as I said, create a class for your dialog. Add the control to the class using class wizard. Also add a button to the dialog, and add a button clicked handler. Then, when the button gets pushed, add your for loop in the button handler.
Hope that helps.
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Yes! Thanks. Your pointer was key to the fix.
Is there a way to *interrupt* the progress? For example, let say the user wants to cancel out, but the program is still processing something and the progressbar is not at 100. Is there a way to implement a cancel button to exit completely?
Kuphryn
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