C / C++ / MFC Discussion Boards

Robert A. T. Káldy27-Jan-04 10:26

27-Jan-04 10:26

The callback function takes the cb parameter, which contains required size of CRichEditCtrl data. You can grow the HGLOBAL memory with GlobalRealloc.

Robert-Antonio

ending SDI application

Drawil26-Jan-04 23:41

Drawil

26-Jan-04 23:41

hello every body
I want to know how can i end an sdi application like what we do in the Dialog application by calling CDialog::OnOk()

Best Regards Smile | :)

Re: ending SDI application

Stlan27-Jan-04 0:46

Stlan

27-Jan-04 0:46

I believe the best practice is to post a WM_CLOSE message to your CFrameWnd-derived object. Something like that: AfxGetMainWnd()->SendMessage(WM_CLOSE);

Re: ending SDI application

Drawil27-Jan-04 2:08

Drawil

27-Jan-04 2:08

thank u for it is working now

Best Regards Smile | :)

Dialog edit control & Enter key

Ashman26-Jan-04 23:11

Ashman

26-Jan-04 23:11

Hi!
I want in my program to be able to input text into an edit control and instead of having to move the mouse and click on the button to get the text input, I want it so that when you press enter, rather than closing the dialog, it will work the same as clicking on the button.

Can someone please help?

Thankyou
Ashman

Re: Dialog edit control & Enter key

CodeBrain26-Jan-04 23:30

CodeBrain

26-Jan-04 23:30

I have done this some time ago. I don't know exactly how I have done it anymore, but I think I have used CWnd::PreTranslateMessage. If you overload it in your dialog class you can capture the key event before it is sent to the window!

Re: Dialog edit control & Enter key

Drawil26-Jan-04 23:50

Drawil

26-Jan-04 23:50

Hi I think to deactivate Enter Key u have to cancel OnOk() in the virtual member function like the following:
//////////////////////////////////////////////
void CanyDlg::OnOK()
{
// TODO: Add extra validation here

//CDialog::OnOK();
}
//////////////////////////////////////////////

Best Regards Smile | :)

Re: Dialog edit control & Enter key

Diddy26-Jan-04 23:54

Diddy

26-Jan-04 23:54

Capture the WM_COMMAND message for your default button (lets say here your default button has the ID IDOK) by overriding the relavant function, CYourDialog::OnOk in this case, then rather than calling the base CDialog::OnOk, move the focus to your edit control, either like this:

GetDlgItem(IDC_MY_EDIT_CTRL)->SetFocus();

Or like this:

SendMessage(WM_NEXTDLGCTL, (WPARAM)GetDlgItem(IDC_MY_EDIT_CTRL)->GetSafeHWnd(), TRUE);

The difference between them is the second is usually more suited to moving the keyboard focus around a dialog box as it updats the button borders correctly, so in full:

void CMyDialog:::OnOk()
{
if(CWnd::GetFocus() == GetDlgItem(IDC_MY_EDIT_CTRL))
{
// edit control focused, so do normal stuff
CDialog::OnOk();
}
else
{
// move focus to edit control
SendMessage(WM_NEXTDLGCTL, (WPARAM)GetDlgItem(IDC_MY_EDIT_CTRL)->GetSafeHWnd(), TRUE);
}
}

This will make enter move the focus to the edit control if something other than the edit control is foucsed, or make enter behave as normal if it is the edit control that's focused

Re: Dialog edit control & Enter key

SiddharthAtw27-Jan-04 0:58

SiddharthAtw

27-Jan-04 0:58

That's all U need in MFC. I know very similar solution in win32sdk. If U need tell?
Cheers!
Siddharth

Re: Dialog edit control & Enter key

toxcct27-Jan-04 2:54

toxcct

27-Jan-04 2:54

hi Ashman,

all you have to do is to set the focus on the specific control... you can use

(CEdit*)GetDlgItem(YOUR_Edit_ID))->SetFocus();

to avoid you to move explicitly your mouse upon the EditBox, and in the OnInitDialog(), you tell which button to be pressed when the user presses Enter key by giving it the property Default

TOXCCT

Problem in SearchPath

SiddharthAtw26-Jan-04 22:49

SiddharthAtw

26-Jan-04 22:49

I want to initialize a executable, making OS to search for the file.

STARTUPINFO si = {sizeof(si)};<br />
PROCESS_INFORMATION pi;<br />
TCHAR szCommandLine[1024] = {0},*pszCommandLine = 0;<br />
<br />
DWORD lFileName = <br />
SearchPath(NULL,(LPCWSTR)"YPager",(LPCWSTR)".exe",(DWORD)sizeof(szCommandLine), szCommandLine, *pszCommandLine);<br />
<br />
BOOL bCreate = CreateProcessNULL,szCommandLine,NULL,NULL,FALSE,0,NULL,NULL,&si,&pi);

there is no complier error but szCommandLine cannot fill the path.

Any other suggestions to achieve the same goal is appreciated.
Cheers!
Siddharth

Do not post always the same question !

Stlan26-Jan-04 23:09

Stlan

26-Jan-04 23:09

It will not help you to get a response faster!

Re: Do not post always the same question !

Anonymous27-Jan-04 0:21

Anonymous

27-Jan-04 0:21

There was a bit problem with my server. Hence it's like that. Any way sorry if anyone get anoyed

Multilingual resource strings

Kannan Ramanathan26-Jan-04 22:30

Kannan Ramanathan

26-Jan-04 22:30

Hi,

I use VC6 (SP5) in Windows XP Pro (SP1). I wanted to add Greek/Chinese strings. I edited the .rc files in a Unicode editor, saved the file as UTF-8. But, now, VC6 has problems handling the file. But, if I save it as a normal file, the strings are garbled.

How do I add other language strings to my resource file and what shd I use to compile it?

TIA
MRK

Re: Multilingual resource strings

Alberto Giannetto27-Jan-04 4:46

Alberto Giannetto

27-Jan-04 4:46

I've noticed that VC6 has problems in dealing with language strings, especially unicode characters. What we do normally is create the structure of the resource file using the VC resource editor, then have the translators to use their text editor (I think they use TextPad), re-include the modified resource file in Visual Studio. DO NOT modifiy in any way the file after it has been translated - do not change dialogs, not accelerators, nothing. If you do get a saved copy of the translated version and copy and paste the text using a text editor to replace the garbled text.

VC7 seems to have addressed the problem.

Hope that helps.

How to make a Wizard?

Jay.Jay26-Jan-04 22:18

Jay.Jay

26-Jan-04 22:18

I want to make a wizard. For example i have four dialogs. The last one is my main dialog.

Now i open the first dlg. From this dlg i want to open the next dlg with a button, but the first one doesn´t close.
How can i check if the second dlg is opened and i´m able to close the first one.

maybe there is another way to create a wizard!?

J.J.

Re: How to make a Wizard?

Stlan26-Jan-04 22:45

Stlan

26-Jan-04 22:45

In MFC, you can use the classes CPropertySheet[^] and CPropertyPage.

Re: How to make a Wizard?

Joe Woodbury27-Jan-04 5:32

Joe Woodbury

27-Jan-04 5:32

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/shellcc/platform/commctls/propsheet/wizards.asp[^]

Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke

DLL debugging

JeyKey26-Jan-04 22:12

JeyKey

26-Jan-04 22:12

I have source code for a DLL created in C++ .net, I want to debug this.

I have created a second project (console application ) in the same solution ,for calling a particular function from the first project and passing parameter to it.

But when I tried to call that function

int DNAPrintExport InstallPrinter(const char* cpstrPrinterData)
{

}
using the following code in the second project

int abc=InstallPrinter("Hello");

I am getting error C2065: 'InstallPrinter' : undeclared identifier

Can anybody help me to do this please

Thanks in advance

Jayakrishnan

Re: DLL debugging

Stlan26-Jan-04 23:01

Stlan

26-Jan-04 23:01

Have a look here[^] and see how _declspec(dllimport) is used to import a function from a DLL to another application.

Could somebody please help???

Einly26-Jan-04 22:08

Einly

26-Jan-04 22:08

Dear all,

I am using Visual C MFC Dialog-based application to obtain USB data from a Cypress chip. DeviceIoControl(IOCTL_EZUSB_BULK_READ...)... I am doing this using multithreading method. However, I face a problem when I compile. This is part of my program:

UINT SendOpThread(LPVOID pParam)
{
int bResult;
CThreadInfo* pTh = (CThreadInfo*)pParam;

BULK_TRANSFER_CONTROL2 btc;
btc.pipeNum = 0;

DeviceHandle = CreateFile("\\\\.\\ezusb-0",
GENERIC_WRITE,
FILE_SHARE_WRITE,
NULL,
OPEN_EXISTING,
0,
NULL);
bResult = DeviceIoControl (DeviceHandle,
IOCTL_EZUSB_BULK_READ,
&btc,
sizeof (BULK_TRANSFER_CONTROL),
r_Buffer,
sizeof(r_Buffer),
&nBytes,
NULL);

CloseHandle(DeviceHandle);

Confused | :confused:

wsprintf(str, "r_Buffer[%d]: %04X\n", i,r_Buffer[i]);

SendDlgItemMessage(IDC_OUTPUT6,
LB_ADDSTRING,
0,
(LPARAM)(LPCTSTR) str); Confused | :confused:

return(bResult);
}

void CUSB1Dlg::OnBulkRead()
{
// TODO: Add your control notification handler code here
int Code=1;

stream1 = fopen("data.txt","a+") ;

myWinThread = AfxBeginThread(SendOpThread, &Code, THREAD_PRIORITY_HIGHEST,0,CREATE_SUSPENDED);

myWinThread->m_bAutoDelete=FALSE;
myWinThread->ResumeThread();
.
.
.
}

When I compile, I got this error:

'SendDlgItemMessageA' : Function does not take 4 parameters

I found from the Help:
SendDlgItemMessage consists of 3 types: which is CWnd, CWindow, & Windows User Interface. Which 1 should the thread belongs to?

I assumed that it belongs to WUI, and so it requires HWND hDlg, a handle of dialog box. Since I am using Dialog-based application where the dialog is already created, how should I put for the hdlg parameter?

I really wish that someone could help me...

Einly

Re: Could somebody please help???

Steve S26-Jan-04 22:34

Steve S

26-Jan-04 22:34

OK, here's my 2 cents worth. You can change the code slightly by using

CWnd* pWnd = GetDlgItem(IDC_OUTPUT6);
if (pWnd)
{
pWnd->SendMessage(LB_ADDSTRING, 0, (LPARAM)(LPCTSTR)str);
}

assuming, of course, this happens in a dialog member function.
If not, and it's in something like a worker thread, as part of the thread parameter block, you need something more complex than a simple int.
Perhaps
struct paramblock {
int code;
HWND hWnd;
};
would help Smile | :)

Then get the HWND before invoking the AfxBeginThread, and use the WINAPI version.

As a rule, you can specify you want that version by using the global scope prefix '::'

eg ::SendMessage(param.hWnd, LB_ADDSTRING, 0, (LPARAM)(LPCTSTR)str);

Hope this helps

Steve S

Re: Could somebody please help???

Einly27-Jan-04 19:06

Einly

27-Jan-04 19:06

Thanks for your reply. Sorry that I am quite poor in Visual C. May I know how do I get hWnd? hWnd=??? My objective is to output some message in my worker thread. So, let say...

UINT SendOpThread(LPVOID pParam)
{
int bResult;
CThreadInfo* pTh = (CThreadInfo*)pParam;

BULK_TRANSFER_CONTROL2 btc;
btc.pipeNum = 0;

DeviceHandle = CreateFile("\\\\.\\ezusb-0",
GENERIC_WRITE,
FILE_SHARE_WRITE,
NULL,
OPEN_EXISTING,
0,
NULL);
bResult = DeviceIoControl (DeviceHandle,
IOCTL_EZUSB_BULK_READ,
&btc,
sizeof (BULK_TRANSFER_CONTROL),
r_Buffer,
sizeof(r_Buffer),
&nBytes,
NULL);

CloseHandle(DeviceHandle);

wsprintf(str, "r_Buffer[%d]: %04X\n", i,r_Buffer[i]);

::SendDlgItemMessage(pParam2.hWnd, LB_ADDSTRING,
0,
(LPARAM)(LPCTSTR) str);
return(bResult);
}

void CUSB1Dlg::OnBulkRead()
{
// TODO: Add your control notification handler code here
struct paramblock{
int Code=1;
HWND hWnd;
};

Confused | :confused:

What should I write here?

stream1 = fopen("data.txt","a+") ;

myWinThread = AfxBeginThread(SendOpThread, Confused | :confused:

here??pPar, THREAD_PRIORITY_HIGHEST,0,CREATE_SUSPENDED);

myWinThread->m_bAutoDelete=FALSE;
myWinThread->ResumeThread();
.
.
.
}

Einly

Re: Could somebody please help???

Einly27-Jan-04 19:06

Einly

27-Jan-04 19:06

Thanks for your reply. Sorry that I am quite poor in Visual C. May I know how do I get hWnd? hWnd=??? My objective is to output some message in my worker thread. So, let say...

UINT SendOpThread(LPVOID pParam)
{
int bResult;
CThreadInfo* pTh = (CThreadInfo*)pParam;

BULK_TRANSFER_CONTROL2 btc;
btc.pipeNum = 0;

DeviceHandle = CreateFile("\\\\.\\ezusb-0",
GENERIC_WRITE,
FILE_SHARE_WRITE,
NULL,
OPEN_EXISTING,
0,
NULL);
bResult = DeviceIoControl (DeviceHandle,
IOCTL_EZUSB_BULK_READ,
&btc,
sizeof (BULK_TRANSFER_CONTROL),
r_Buffer,
sizeof(r_Buffer),
&nBytes,
NULL);

CloseHandle(DeviceHandle);

wsprintf(str, "r_Buffer[%d]: %04X\n", i,r_Buffer[i]);

::SendMessage(pParam2.hWnd, LB_ADDSTRING,
0,
(LPARAM)(LPCTSTR) str);
return(bResult);
}

void CUSB1Dlg::OnBulkRead()
{
// TODO: Add your control notification handler code here
struct paramblock{
int Code=1;
HWND hWnd;
};

Confused | :confused:

What should I write here?

stream1 = fopen("data.txt","a+") ;

myWinThread = AfxBeginThread(SendOpThread, Confused | :confused:

here??pPar, THREAD_PRIORITY_HIGHEST,0,CREATE_SUSPENDED);

myWinThread->m_bAutoDelete=FALSE;
myWinThread->ResumeThread();
.
.
.
}

Einly

GDI+ : construct Image from an IStream

sstoyan26-Jan-04 21:55

sstoyan

26-Jan-04 21:55

im trying to construct a GDI+ Image object from an IStream;
the IStream is created on global memory successfully and assigned valid image data but, when i try
image = ::new Image(stream)

laststatus says something about wrong/incorrect arguments
("InvalidParameter" i think)

has anybody tried this ?

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.