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My question is in regards to a resource editor created control. I'll use CEdit for this example. There does not appear to be any way to create/construct a CEdit based on just the resourceID. For example, Borland's OWL let you simply do this: TEdit(parent, resourceID). There is no equivalent way to do this in MFC.
It seems GetDlgItem() is the call to use when you want a control from the resource editor to become a CEdit variable in code.
I was wondering if there was someway to do it with Create, but that really seems more geared for dynamically creating a control.
Thanks for the input this far. I appreciate it.
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MFC does things a bit different in this regard.
One way to add a CEdit object to represent a control in a dialog is to let the wizard do it.
Right-click the control in the resource editor and choose "Add Variable...".
This will add a CEdit member that gets initialized through MFC's DDX system - you'll see it
in the dialog class' DoDataExchange() override (something like
DDX_Control(pDX, IDC_EDIT1, m_Edit1Edit); A second way is to attach the HWND of an existing control to a CEdit object:
CEdit MyEdit;
MyEdit.Attach(*GetDlgItem(IDC_EDIT1));
"Great job, team. Head back to base for debriefing and cocktails."
(Spottswoode "Team America")
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Another option is to declare the m_myEdit variable and then use the SubclassDlgItem function. Remember to call UnsubclassWindow when destroying the window
Judy
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Son-of-a-gun! They've got a method for everything!
That's easier than my 2nd example 
Thank you!
Mark
"Great job, team. Head back to base for debriefing and cocktails."
(Spottswoode "Team America")
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I was planning to go the GetDlgItem route, as I am familiar with that. I hadn't thought of SubclassDlgItem, though.
Thanks again. You've all been very helpful.
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Hi,
I'm trying to select pictures having displayed when I click on a different item in my list box. I followed this tutorial exactly "http://www.functionx.com/visualc/applications/displaybitmap.htm", however, instead of using a combo box, I would like to use a list box, but for some reason I'm having difficulty. Please help.
Thanks
ibs
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I suggest use of CListCtrl instead CListBox
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First you must draw a list box,then add a Control variable for the list box.
Then In the function of OnInitDialog() you can Init the list box.
The other is the same as the "http://www.functionx.com/visualc/applications/displaybitmap.htm".
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Hi,
Thanks for your help. I know sure how to Init the list box of the function of OnInitDialog(). Can you show me how? Thanks.
Ibs
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Does anyone know of a way to get LVN_ITEMCHANGED to fire with a virtual list view control (i.e. it has the LVS_OWNERDATA style bit set)?
Is there a good way to simulate this? This is really driving me nuts.
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Jim Crafton wrote: Is there a good way to simulate this?
Perhaps you could just post/send a hand-crafted WM_NOTIFY?
/ravi
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That's what I was thinking too, but I don't quite know where to put it. Do I need to override the default WM_LBUTTONXXX events?
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Hi - I hope someone out there is more familiar with using this dll than I am!
I am trying to write data to the CTRL register of my parallel port (0x037a). Now I know that you cant do this using _out() (OS is XP), so I have used inpout32.dll. This seams to work when writing to the data port, but when I write to the CTRL port, the lines strobe up and then down (when looked at with a scope). What I wish to happen is that any data written remains on the port, until updated by any further writes. This seems to work OK when using _out() and Win98, but for some reason, Out32() and XP doesnt do what I hoped it would!
By the way, I am using VC++6.0
Thanks for any help, or redirection to another method of writting to the parallel port.
69 Bay
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dont bother looking - I HAVE RESOLVED IT!
the problem was that I was also writing to the CTRL register in a thread, which I had forgotten about. Once I removed the write command, all works!
Sorry to have posted this!
69 Bay
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in my SDI VC6.0 project, I have two property sheets in my form view. I want the left one to be skinny, so I can make the right one wider. I used IDD_PROPPAGE_SMALL as the template for the property pages in the left property sheet, and set the dimension to be 150x265 dialog units. But somehow, the left sheet is still pretty big. I googled a bit, and it turned out the limitation is PROP_SM_CXDLG defined in prsht.h.
I add thse to mypropertypage.h, but they don't seem to work. Anyone can point out what I did wrong please? TIA!
#ifdef PROP_SM_CXDLG
#undef PROP_SM_CXDLG
#define PROP_SM_CXDLG 150
#endif
#ifdef PROP_MED_CXDLG
#undef PROP_MED_CXDLG
#define PROP_MED_CXDLG 150
#endif
#ifdef PROP_LG_CXDLG
#undef PROP_LG_CXDLG
#define PROP_LG_CXDLG 150
#endif
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Hi all...
I'm doing some development which queries a PC network by making requests to a file on the host system through HTTP. I'm experimenting with CInternetSession & CHttpFile, and some of the examples of each on this site.
I have a few questions/problems:
1) Is there a way I can easily determine the MAC address of the PC I'm connectedly to?
2) I'm encountering lock-up when the hardware becomes disconnected from the network midway through the CHttpFile->Read() operation. This function hangs infinitely. Is there a timeout you can set for this?
I countered this problem with the
WebGrab Example
Here is a snippet:
BOOL CWebGrab::GetFile ( LPCTSTR szURL, CString& strBuffer, LPCTSTR szAgentName , CWnd* pWnd )<br />
{<br />
m_rawHeaders ="";<br />
m_infoStatusCode=0;<br />
strBuffer.Empty();<br />
<br />
if (!m_pSession && !Initialise(szAgentName, pWnd))<br />
return FALSE;<br />
<br />
if (pWnd)<br />
m_pSession->SetStatusWnd(pWnd);<br />
<br />
<br />
DWORD dwCount = 0;<br />
CHttpFile* pFile = NULL;<br />
try<br />
{<br />
pFile = (CHttpFile*) m_pSession->OpenURL(szURL, 1,<br />
INTERNET_FLAG_TRANSFER_BINARY | INTERNET_FLAG_DONT_CACHE<br />
);<br />
<br />
<br />
}<br />
catch (CInternetException* e)<br />
{<br />
TCHAR szCause[255];<br />
e->GetErrorMessage(szCause, 255);<br />
m_pSession->SetStatus(szCause);<br />
e->Delete();<br />
delete pFile;<br />
pFile = NULL;<br />
return FALSE;<br />
}<br />
<br />
COleDateTime startTime = COleDateTime::GetCurrentTime();<br />
LPSTR pBuf = NULL;<br />
if (pFile)<br />
{<br />
pBuf = (LPSTR) ::GlobalAlloc(GMEM_FIXED, BUFFER_SIZE+1);<br />
if (!pBuf)<br />
{<br />
pFile->Close();<br />
delete pFile;<br />
return FALSE;<br />
}<br />
<br />
BYTE buffer[BUFFER_SIZE+1];<br />
try {<br />
UINT nRead = 0;<br />
DWORD size;<br />
dwCount = 0;<br />
do<br />
{<br />
nRead = pFile->Read(buffer, BUFFER_SIZE); - LOCKS HERE waiting for the rest of the bytes.<br />
<br />
if (nRead > 0)<br />
{<br />
buffer[nRead] = 0;<br />
<br />
LPTSTR ptr = strBuffer.GetBufferSetLength(dwCount + nRead + 1);<br />
memcpy(ptr+dwCount, buffer, nRead);<br />
<br />
dwCount += nRead;<br />
strBuffer.ReleaseBuffer(dwCount+1);<br />
<br />
COleDateTimeSpan elapsed = COleDateTime::GetCurrentTime() - startTime;<br />
double dSecs = elapsed.GetTotalSeconds();<br />
if (dSecs > 0.0)<br />
{<br />
m_transferRate = (double)dwCount / 1024.0 / dSecs;<br />
m_pSession->SetStatus("Read %d bytes (%0.1f Kb/s)", <br />
dwCount, m_transferRate );<br />
<br />
}<br />
else<br />
{<br />
m_pSession->SetStatus("Read %d bytes", dwCount);<br />
m_transferRate = dwCount;<br />
}<br />
}<br />
}<br />
while (nRead > 0);<br />
}<br />
catch (CFileException *e)<br />
{<br />
TCHAR szCause[255];<br />
e->GetErrorMessage(szCause, 255);<br />
m_ErrorMessage = szCause;<br />
m_pSession->SetStatus(szCause);<br />
e->Delete();<br />
delete pFile;<br />
::GlobalFree(pBuf);
return FALSE;<br />
}<br />
pFile->QueryInfoStatusCode(m_infoStatusCode); <br />
pFile->QueryInfo(HTTP_QUERY_RAW_HEADERS ,m_rawHeaders);<br />
pFile->Close();<br />
::GlobalFree(pBuf);
delete pFile;<br />
}<br />
<br />
m_pSession->SetStatus("");<br />
<br />
return TRUE;<br />
}
Anybody have any suggestions?
Mike
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Mike Doner wrote: Is there a timeout you can set for this?
Yes, you can use CInternetSession.SetOption() to set various kinds of timeouts. See this[^] page for values.
/ravi
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Mike Doner wrote: 2) I'm encountering lock-up when the hardware becomes disconnected from the network midway through the CHttpFile->Read() operation. This function hangs infinitely. Is there a timeout you can set for this?
No and hanging should not happen. When the physical network is no longer available the read() should unblock and WSAGetLastError() should return an error like WSAECONNABORTED or something.
led mike
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Mike Doner wrote: 2) I'm encountering lock-up when the hardware becomes disconnected from the network midway through the CHttpFile->Read() operation. This function hangs infinitely. Is there a timeout you can set for this?
Have you tried the INTERNET_OPTION_RECEIVE_TIMEOUT option using CInternetSession::SetOption()?
*EDIT* Never mind - I see that's what Ravi said 
"Great job, team. Head back to base for debriefing and cocktails."
(Spottswoode "Team America")
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I have to display a message which has to enable for only two seconds.how to do this?
how to set timer for this???????
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have a look at SetTimer and WM_TIMER/ON_WM_TIMER
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See here.
"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15
"Judge not by the eye but by the heart." - Native American Proverb
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MFC does not have an Urgent Timer. Try the .NET Platform
System.Urgent.Timer
led mike
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Once again, I can't wait to upgrade to .NET 2.0+ (VS2005) to take advantage of stuff like that.
Do you want fries with that?
"Great job, team. Head back to base for debriefing and cocktails."
(Spottswoode "Team America")
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