Re: Multithreading - passing message to a window question - C / C++ / MFC Discussion Boards

Fatboyslim11-Aug-04 20:07

11-Aug-04 20:07

Hi I want to Read and write to USB port from VC++.
I want to know how to use the inbuilt USB device driver.

for e.g
If i want to create a file using createfile function then
what service shall i specify in the first argument.
Thanx in advance

XML Parsing

11-Aug-04 19:19

I got XML File,
it looks like this:

<br />
  <?xml version="1.0" encoding="windows-1251" ?> <br />
- <Данные><br />
- <Справочники><br />
- <Name Group="Спиртные напитки"><br />
- <Name Group="бальзам"><br />
- <Name Group="бальзам Биос"><br />
  <Name Code="Казахский_0.25_л" SMTH="бальзам Биос Казахский 0.25 л" SMTH1="Есть" МелкОптЦена="111" ОптЦена="0" РознЦенра="115" /> <br />
  <Name Code="Казахский_0.5_л" SMTH="бальзам Биос Казахский 0.5 л" SMTH1="Есть" МелкОптЦена="200" ОптЦена="0" РознЦенра="206" /> <br />
  </Реквизит><br />
  </Реквизит><br />
  </Справочники><br />
  </Данные><br />

And i want to get data (Group,Code, SMTH,SMTH1......). But i don't know how to get them. I Use msxml.dll and interfaces : MSXML::IXMLDOMDocumentPtr, MSXML::IXMLDOMElementPtr...

Re: XML Parsing

11-Aug-04 19:49

Something wrong with writing XML code here Smile | :)

In other words:

<Name Group="Something">
<Name Code="1234" SMTH="asdf" SMTH1="gd">

How to get data from Code, SMTH?

Re: XML Parsing

*Dreamz11-Aug-04 20:41

*Dreamz

11-Aug-04 20:41

		IXMLDOMDocument *pDomDoc;<br />
		IXMLDOMNodeList		*pXMLDOMNodeList = NULL;<br />
		IXMLDOMNode			*pXMLDOMNode = NULL,<br />
							*pXMLAttrNode = NULL,<br />
							*pXMLChildNode = NULL;<br />
		IXMLDOMNamedNodeMap *pXMLAttributes = NULL;<br />
<br />
		IXMLDOMNode *pXMLParentNode = NULL,<br />
					*pXMLGrandParentNode = NULL;<br />
<br />
		CString strAttributeValue;<br />
		CComBSTR bstrAttrName;<br />
		HRESULT	hResult;<br />
<br />
		//Create the Instance for IXMLDOMDocument<br />
		hResult = CoCreateInstance(CLSID_DOMDocument,<br />
								   NULL,<br />
								   CLSCTX_INPROC_SERVER,<br />
								   IID_IXMLDOMDocument,<br />
								   reinterpret_cast<void**>(&lpDomDoc));<br />
		if(FAILED(hResult))<br />
			return FALSE;<br />
		hResult = pDomDoc->put_async(FALSE);<br />
		if(FAILED(hResult))<br />
			return FALSE;<br />
<br />
		CComVariant		vFileName(szXmlFilePath);<br />
		VARIANT_BOOL	vBool;<br />
		//Loading the Specified File<br />
		pDomDoc->load(vFileName,&vBool);<br />
		if(VARIANT_TRUE == vBool)<br />
		{<br />
			hResult = pDomDoc->getElementsByTagName(L"Name", &pXMLDOMNodeList);<br />
			if(FAILED(hResult))<br />
				return FALSE;<br />
<br />
			//Get the First Node from the List<br />
			hResult = pXMLDOMNodeList->nextNode(&pXMLDOMNode); //Get this in a loop if u have more than one Name Node<br />
			if(FAILED(hResult))<br />
				return FALSE;<br />
<br />
			hResult = pXMLDOMNode->get_attributes(&pXMLDOMNamedNodeMap);<br />
			if(FAILED(hResult) || pXMLDOMNamedNodeMap == NULL )<br />
				return FALSE;<br />
<br />
			bstrAttrName = "Code"; //Use for other attributes also..<br />
			hResult = pXMLDOMNamedNodeMap->getNamedItem(bstrAttrName,&pXMLAttrNode);<br />
			if(FAILED(hResult) || pXMLAttrNode == NULL)<br />
				return FALSE;<br />
			hResult = pXMLAttrNode->get_nodeValue(&varNodeValue);<br />
			if(FAILED(hResult))<br />
				return FALSE;<br />
			strAttributeValue.Format(_T("%S"),V_BSTR(&varNodeValue));<br />
		}<br />
		else<br />
			return FALSE;

Hope this will help you ...

Re: XML Parsing

paulb11-Aug-04 21:10

paulb

11-Aug-04 21:10

here is an example using XPath query language:

assuming XML file looks like this and you want to get the value of attrib2

<element1>
<element2 attrib1="123" attrib2=abc" />
</element1>

<pre>

#using "msxml40.dll"

IXMLDOMDocumentPtr spDoc;
spDoc.CreateInstance(__uuidof(MSXML2::DOMDocument40));

// load the XML file
_variant_t vFile("path to some file.xml");
VARIANT_BOOL bSuccess;
spDoc->load(vFile, &bSuccess);

// construct XPath query
std::string str("/element1/element2[@attrib1='123']");
_bstr_t bstr(str);

// get node matching the query (assuming only one node matches)
IXMLDOMNodePtr spNode;
spDoc->selectSingleNode(bstr, &spNode);

// get attribute node
IXMLDOMNamedNodeMapPtr spNodeMap;
spNode->get_attributes(&spNodeMap);

IXMLDOMNodePtr spAttributeNode;
spNodeMap->getNamedItem(L"attrib2", &spAttributeNode);

// get attribute value
_variant_t v;
hr = spAttributeNode->get_nodeValue(&v);

</pre>

Re: XML Parsing

Rassul Yunussov12-Aug-04 0:09

Rassul Yunussov

12-Aug-04 0:09

Thak YOU Very MUCH. You BOTH Helped me so MUCH. Tanks again Smile | :)

.
But now i got another question - how to create new XML file?
And Where To Find Full Help Information about all these?

Multithreading - passing message to a window question

Indrawati11-Aug-04 19:05

Indrawati

11-Aug-04 19:05

Hi
I have an app that use multithreading to update the display of a window. I use AfxBeginThread() to spawn the thread, passing a copy of the window's m_hWnd as its parameter. This thread will then execute SendMessage() to update the window's display. This works OK in the Debug mode. However, in the release mode, it always gives error (The app has encountered a problem and will be closed etc2) whenever I have spawned two of the said threads, and then I switched window! This error still occurs even if I make the member function processing the message to do no processing (i.e. it just returns). However, this error does not occur if I comment out the SendMessage() line in the thread's function. I have tried using PostMessage() instead of SendMessage(), but with the same result. Could someone tell me what's the possible cause for this?

Thanks!

Re: Multithreading - passing message to a window question

Milton Karimbekallil11-Aug-04 20:50

Milton Karimbekallil

11-Aug-04 20:50

Since the prblm is with release build only , mostly it will be a memory initialiaztion/allocation prblm.

Since both SendMessage and PostMessage failed, mostly the prblm will be with the initialiaztion of one of the parameter to these functions.

chk whether hwnd is initialized as below.

HWND hWnd = NULL;
or use
AfxGetApp()->GetMainWnd()->SendMessage

rgds .. mil10

Re: Multithreading - passing message to a window question

Ravi Bhavnani11-Aug-04 20:52

Ravi Bhavnani

11-Aug-04 20:52

This[^] article may help.

/ravi

My new year's resolution: 2048 x 1536
Home | Articles | Freeware | Music
ravib@ravib.com

Re: Multithreading - passing message to a window question

Rory Solley11-Aug-04 21:29

Rory Solley

11-Aug-04 21:29

I presume you are passing a custom message to your window, e.g. WM_MYMESSAGE or something (defined from WM_USER + <some arbitrary="" number=""> or you've used RegisterMessage)?

I'm also assuming that your message handler is something like:

LRESULT OnMyMessage(WPARAM wParam, LPARAM lParam);

You MUST make sure that you include the WPARAM and LPARAM arguments. Omitting them will work in DEBUG but will NOT work in release build. This is due to the way the stack is padded in debug builds. In a release build, the message map will expect the arguments - if they're not there, you will corrupt the stack, resulting in an exception.

Apologies if this is not what you're after, I'm just making blind assumptions from your original post.

Re: Multithreading - passing message to a window question

Anonymous11-Aug-04 21:32

Anonymous

11-Aug-04 21:32

Hi Thank you thank you thank you! Yep it's exactly what I'm looking for. The program's OK now when I modified the OnMyMessage() function.

convert CString to Unicode (hex)

ba5h33r11-Aug-04 18:47

ba5h33r

11-Aug-04 18:47

i'm trying to convert CString into Unicode (hex) values.

I am doing like ,

CString name;
BYTE unicode[];

input : name="Farhan"
outout : {0x00,0x46,0x00,0x41,0x00,0x52,0x00,0x48,0x00,0x41,0x00,
0x4E}

(in unicode ,each character has 2 byte unicode values).

any suggestion/help is appreciated

Re: convert CString to Unicode (hex)

Tim Smith11-Aug-04 18:57

Tim Smith

11-Aug-04 18:57

If you are using MFC7, then just assign the string to CWString. Or is it CStringW...

Tim Smith

I'm going to patent thought. I have yet to see any prior art.

Re: convert CString to Unicode (hex)

paulb11-Aug-04 20:24

paulb

11-Aug-04 20:24

there's a few macros for doing this:

CString name;
LPWSTR unicode = CT2W(name);

WinLogon HWND

GutterBoy11-Aug-04 18:00

GutterBoy

11-Aug-04 18:00

I'm wanting to get an HBITMAP from the WinLogon HWND to my app that is running in the user desktop process. Any ideas? I'm fresh out.

Re: WinLogon HWND

Milton Karimbekallil11-Aug-04 21:14

Milton Karimbekallil

11-Aug-04 21:14

u mean that logon window with username and password?
if so it will not b ther after u logged in. so ur ap can't get an hbitmap from that wnd.

if u just want to edit the imgs in the logon scrn then open c:\winnt\system32\msgina.dll in vc6 ide as a resource file. then u will see all the log on log off imgs and u can edit it. to know more abt how to create GINA dlls, go thru GINA topics in msdn.

rgds...mil10

Re: WinLogon HWND

GutterBoy12-Aug-04 2:15

GutterBoy

12-Aug-04 2:15

Actuall I want to take a screen shot of it when it is active, ie the application desktop is in a locked state. Otherwise I want a screen shot of the application desktop, which is no problem since the app is running on the application desktop.

Re: WinLogon HWND

GutterBoy12-Aug-04 2:17

GutterBoy

12-Aug-04 2:17

What I'm doing is something simular to remote desktop. I just need to send the winlogon desktop screenshot when it's active to my client app.

Re: WinLogon HWND

Milton Karimbekallil12-Aug-04 2:49

Milton Karimbekallil

12-Aug-04 2:49

solution is 2 go 4 GINA dll. replace teh system msgina.dll with ur custom gina dll....

rgds...mil10.

Re: WinLogon HWND

gafman12-Aug-04 5:21

gafman

12-Aug-04 5:21

That's not a viable solution.

CopyFileEx not working

kelkatu11-Aug-04 17:39

kelkatu

11-Aug-04 17:39

Hi. I'm a beginner at VC++. Currently, I'm trying to learn how to use the CopyFile function. I've tried using the CopyFile function and succeeded. However, when I tried using the CopyFileEx function in the same project, the compile error message says that CopyFileEx is an undeclared variable. I've checked with MSDN, both are using the same header and library files. Please help.

Re: CopyFileEx not working

Ryan Binns11-Aug-04 18:31

Ryan Binns

11-Aug-04 18:31

CopyFileEx() is not supported under Windows 95/98/ME, and the _WIN32_WINNT macro has to be defined to at least 0x0400 for it to work.

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"

Re: CopyFileEx not working

kelkatu12-Aug-04 20:39

kelkatu

12-Aug-04 20:39

But I'm using Windows 2000 with Visual C++ 6.0.

Re: CopyFileEx not working

Ryan Binns12-Aug-04 22:54

Ryan Binns

12-Aug-04 22:54

That's irrelevant. Did you set the macro correctly?

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"

Color pushbutton

Puah11-Aug-04 17:35

Puah

11-Aug-04 17:35

To Hello,

My pushbtton will be coloured differently based on some results.
Anyone has any examples on WM_CTLCOLOR?
CBitMapButton is not what I want.
Thanks

S1189216G

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