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I've made a CEdit-derived class called CLockEdit and added a Get- and SetEnabled() function that holds the member variable to see if it should process WM_CHAR messages or not(just so the controls don't look grayed-out when disabled). So I put a CLockEdit control on a dialog that only has that control and the ok and cancel buttons. I allow the user to resize the dialog, and in turn the edit box should also resize. But any CWnd-inherited function like MoveWindow() or GetWindowRect() crashes in wincore.cpp because the hWnd of the control is null. The Methods work like they're supposed to, but I can't resize the window because it crashes on ::IsWindow() in the wincore.cpp file. Any suggestions?
[insert witty comment here]
bdiamond 
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Perhaps is your object instantiated but then not created? Do you use CWnd::SubclassDlgItem in your dialog's OnInitDialog?
Собой остаться дольше...
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No, I'm not really familiar with SubclassDlgItem. I placed an edit box on the dialog, and associated a CEdit variable with it. Then I went and changed the type to CLockEdit instead of CEdit. The other functions I made for the derived class work, but not anything that needs an hWnd. I've read what you said and looked it up, but I can't seem to get this to work. Can you elaborate further?
[insert witty comment here]
bdiamond
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bdiamond wrote:
Can you elaborate further?
Yes 
To use your own class, there are two ways, using DDX or subclass an existing window: Here will I try to explain the second method:
Let's suppose your control as for identifier ID_MY_CONTROL. You created an edit object with this identifier with the resource editor. Next, you need to add a CLockEdit member attribute to your dialog class, let's say CLockEdit m_MyEdit. Then you have to catch the WM_INITDIALOG message, and in the corresponding method, you have to associate the CLockEdit object with the identifier: that's the role of the method CWnd::SubclassDlgItem:
m_MyEdit.SubclassDlgItem(IDC_MY_CONTROL, this);
You will find useful informations about subclassing (and certainly better explained) in this article by The Master himself: Create your own controls - the art of subclassing[^]
HTH,
K.
Собой остаться дольше...
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I tried that before looking at the article you pointed me to and I get an ASSERTION error in this code in wincore.cpp:
ASSERT(m_hWnd == NULL);
ASSERT(FromHandlePermanent(hWndNew) == NULL);<br />
I also tried using Attach() as I saw in one of my books, and it still didn't work.
[insert witty comment here]
bdiamond
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If you use SubclassDlgItem, be sure not to use the DDX mechanism.
Also, use SubclassDlgItem after having called the base method CDialog::OnInitDialog.
I send you a small example (using VC6), check your mail.
HTH,
K.
Собой остаться дольше...
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That's the same thing I was doing in mine!! However, I saw that in your class the macros IMPLEMENT_DYNAMIC and DECLARE_DYNAMIC weren't there, so I removed that from mine also. Then just to be safe, I deleted the edit box, made another one and started all over. Now it works!!! I thank you a million times.
[insert witty comment here]
bdiamond
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i'm trying to just paint to a dialog using CreateCompatibleDC(), FillRect(), etc, but i cant find the right spot to paint at, i've tried all the OnInitDialog(), etc, doesnt work, only time it works is in OnPaint() then it paints it forever and ever, help me!
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You need to put your painting in OnPaint.
OnPaint will be called whe region needs to get repainted ( when it is Invalidated ).
If your dialog stands on top, and nothing is happening, it should not repaint itself for nothing.
Maximilien Lincourt
Your Head A Splode - Strong Bad
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evilslope wrote:
when do i paint?
This is dependant on you geographic location. Generally it is best to paint during the driest part of the year. 
-- signature under construction -- -pete
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Papa
while (TRUE)
Papa.WillLove ( Bebe ) ;
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With Windows XP, the borders of many controls are now flat (blue with the default theme).
But for TreeCtrl, the borders stay edge.
With the DrawThemeBackground API, I can't found parameters to draw those borders.
Is anyone know how to retrieve informations about current border color ?
Thanks
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Hi,
I found suddenly that in Windows CE .NET (Platform Builder)/eMbedded Visual C++ there is no bsearch function!!! which normally exist in VC++.
How I can get around that issue? Maybe I can get just code for that function which I can icorporate into my.
Thanks in advance.
Val
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It's very easy to roll your own binary search function. With some knowledge of your data structure, someone here can surely be of help.
"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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hi!
i'm trying to write a custom writer sink using the IWMWriterSink but it doesn't work at all. can someone help me, best provide some simple example code? also, how to i then create my customer writer sink object so i can attach it to the writer using AddSink?
my current code looks like this:
--
class CMySink: public IWMWriterSink
{
public:
HRESULT STDMETHODCALLTYPE OnHeader(
/* [in] */ INSSBuffer *pHeader)
{
return S_OK;
}
HRESULT STDMETHODCALLTYPE IsRealTime(
/* [out] */ BOOL *pfRealTime)
{
return S_OK;
}
HRESULT STDMETHODCALLTYPE AllocateDataUnit(
/* [in] */ DWORD cbDataUnit,
/* [out] */ INSSBuffer **ppDataUnit)
{
return S_OK;
}
HRESULT STDMETHODCALLTYPE OnDataUnit(
/* [in] */ INSSBuffer *pDataUnit)
{
return S_OK;
}
HRESULT STDMETHODCALLTYPE OnEndWriting( void)
{
return S_OK;
}
// QueryInterface
STDMETHODIMP QueryInterface(REFIID refiid, void **ppv)
{
if(1 || refiid == IID_IUnknown)
{
*ppv = static_cast<iwmwritersink*>(this);
static_cast<iwmwritersink*>(this)->AddRef();
return S_OK;
}
else
{
*ppv = NULL;
return E_NOINTERFACE;
}
return S_OK;
}
// AddRef
STDMETHODIMP_(ULONG) AddRef()
{
return InterlockedIncrement((PLONG)&refCount_);
}
// Release
STDMETHODIMP_(ULONG) Release()
{
ULONG ul = 0;
if((ul = InterlockedDecrement((PLONG)&refCount_)) == 0)
{
delete this;
}
return ul;
}
ULONG refCount_;
};
--
thanks for any help!!
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I am writing a small project using ODBC which can add, delete and edit records in the database, I have accomplished it, but I don't know how to write the code which I can dump the whole database, I need some advices or sample code, Thanks in advance!
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A simple way (if your database is fairly small) would be to just generate a load of insert statements for all the tables in your database. These could then be replayed in bulk to restore a database.
store your internet favourites online - www.my-faves.co.uk
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Does it necessarily need to go to a text file? If not, I've used this code before to backup up a database:
CShellFileOp ShellFileOp;
CDatabase *pDatabase = GetDatabase();
CString strDBNameFrom,
strDBNameTo;
TCHAR szFilename[_MAX_FNAME],
szExt[_MAX_EXT];
BOOL bAPICalled;
ASSERT(! m_rOptionsInfo.m_strBackupFolder.IsEmpty());
strDBNameFrom = pDatabase->GetDatabaseName();
if (! strDBNameFrom.IsEmpty())
{
strDBNameFrom += _T(".mdb");
_splitpath(strDBNameFrom, NULL, NULL, szFilename, szExt);
strDBNameTo.Format(_T("%s\\Backup of %s%s"), m_rOptionsInfo.m_strBackupFolder, szFilename, szExt);
ShellFileOp.AddSourceFile(strDBNameFrom);
ShellFileOp.AddDestFile(strDBNameTo);
ShellFileOp.SetOperationFlags(FO_COPY, AfxGetMainWnd(), FOF_NOCONFIRMATION);
if (ShellFileOp.Go(&bAPICalled) != FALSE)
AfxMessageBox(IDS_MSG_BACKUPSUCCESS);
else
AfxMessageBox(IDS_MSG_BACKUPFAILED);
}
"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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there standart sollution for this case via xml export/import file.
the only problem i faced was that i couldn't write blob data to the xml: i write them at the end of xml-file in the specified format to simply identify for which records they belong to.
4apai
There're no impossible tasks. There're tasks that required infinite period of execution time.
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You could always Base64 encode your blobs and store them in the XML node structure....
onwards and upwards...
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hm, what does it mean base64 encode?
do u've a sample?
4apai
There're no impossible tasks. There're tasks that required infinite period of execution time.
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I' using visual C++ to add a feature to my program, that enables the user to right-click on any menu item, and the corresponding topic is opened in a *.chm type manual i have already created.
I don't have any clue on how to do this , or if other programming languages are necessary like XML, Java,, etc. But if anyone can offer any ideas on how to this, please let me know.
Thanks for your time,
Eduardo M. Rey
Ed
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If you can already process the right click on the menu item, then you just need to read about the HTMLHelp function.
You need some scheme to map the menu item identifier to the help topic in your CHM file, of course.
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