C / C++ / MFC Discussion Boards

Re: Some help please

Tom Wright13-Dec-04 6:02

Tom Wright

13-Dec-04 6:02

Sorry, I guess I needed more detail

Here is the whole function:

<br />
LRESULT CLAMsgSwDlg::OnMyConnect(WPARAM, LPARAM lParam)<br />
{<br />
	CString * s = (CString *)lParam;<br />
	AfxMessageBox(s);<br />
	delete s;<br />
	return 0;<br />
}<br />

I've tried it that way and I still get an error. But after stepping thru it I found that I was getting an error on the "delete s;". So thanks for that help...now another question. Am I not supposed to delete this pointer so that it does not hold memory and become a leak?

Thanks

Tom Wright
tawright915@yahoo.com

Re: Some help please

Maximilien13-Dec-04 6:09

Maximilien

13-Dec-04 6:09

s ( via lParam ) is not allocated by you, so you don't have to delete it yourself; should be done by the one who initiate the message.

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: Some help please

Tom Wright13-Dec-04 6:12

Tom Wright

13-Dec-04 6:12

I'm trying to send back a pointer to a CString from a thread that I am creating.

After my thread connects to socket sever and a call is made to the OnConnect event then I send message to the main app and pass a pointer to some data.

<br />
void CMyThread::OnConnect()<br />
{<br />
	MessageBox(NULL, "OnConnect", "CMyThread", MB_OK);<br />
	CString threadID = "TESTER";<br />
	if (!PostMessage(myHandle->m_hWnd, UWM_CONNECTED, 0, (LPARAM)&threadID))<br />
		MessageBox(NULL, "Error Posting Connection Message", "Error on PostMessage", MB_OK | MB_ICONEXCLAMATION);<br />
}<br />

then in my main app I want to do something with the data, (for testing purposes, I just pop up a message box with the data sent) when it's received by my main app. But all i get is, I assuming the pointer handle to the CString of the pointer from my thread....and it's garbage when I show it thru afxmessagebox.

<br />
LRESULT CLAMsgSwDlg::OnMyConnect(WPARAM, LPARAM lParam)<br />
{<br />
	CString * s = (CString *)lParam;<br />
	AfxMessageBox("Here in my main app");<br />
	AfxMessageBox(*s);<br />
	//delete s;<br />
	return 0;<br />
}<br />

Thanks

Tom Wright
tawright915@yahoo.com

Re: Some help please

PJ Arends13-Dec-04 7:00

PJ Arends

13-Dec-04 7:00

You are running into scope problems. The CString threadID is going out of scope, and being destroyed, at the end of your OnConnect() method. As a result, the pointer that is recieved by the OnMyConnect() method is no longer valid.

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04

Within you lies the power for good - Use it!

Re: Some help please

Tom Wright13-Dec-04 9:36

Tom Wright

13-Dec-04 9:36

OHHH!! I see what you are saying. That threadId is getting destroyed as soon as I leave the onConnect function.

Okay so how can I keep it in scope until my main app receives the data?

Thanks

Tom Wright
tawright915@yahoo.com

Re: Some help please

toxcct13-Dec-04 7:50

toxcct

13-Dec-04 7:50

Tom Wright wrote:
I'm trying to send back a pointer to a CString

is CString::Format() function help ?

TOXCCT >>> GEII power
[toxcct][VisualCalc]

CSpinButtonCtrl object

poornimac8013-Dec-04 5:05

poornimac80

13-Dec-04 5:05

hello all,

i m hving a problem with CSpinButtonCtl object. It is attached to a RichEdit box. i m using a button to update the values from the rich edit box. the problem is whenever i click on the spin control arrows using mouse the values get updated properly. but whenever i use arrow keys the value shown in the text box is proper but after i update it is showing the old values itself. i hv clicked on the property use arrow keys. please help me as this is very urgent

regards,
poornima

help on timeSetEvent for periodic timer

bkhn4113-Dec-04 4:46

bkhn41

13-Dec-04 4:46

I've just started to learn this high resolution multimedia timer. I have a question regarding to timeSetEvent function.

MMRESULT timeSetEvent(
UINT uDelay,
UINT uResolution,
LPTIMECALLBACK lpTimeProc,
DWORD_PTR dwUser,
UINT fuEvent
);

I want my timer to be TIME_PERIODIC (e.g. fuEvent=TIME_PERIODIC). I want to be able to specify: fire the timer at this particular timer
point t0, then repeatedly fire the timer after every n miliseconds.

Is there a way to make timeSetEvent do so? After setting time event, it should wait now.getmilisec() - t0.getmilisec() to be fired, then repeatedly fires the timer every n miliseconds.

The uDelay field seems to only provide the interval, not the actual time point to fire the timer.

Please feel free to correct me if I'm wrong. Thanks in advance for any help.
Regards,

SATO printer programming

Blubbo13-Dec-04 4:40

Blubbo

13-Dec-04 4:40

Has anyone made any source code for SATO printer? I'm having trouble setting up the code for printing the label with XP version.

my code shown below: (was made in Borland Builder but its in c++ code though.)

void __fastcall TLabel_Test::btnPrintClick(TObject *Sender)
{

DWORD numsent;
OVERLAPPED overlapped;
char LabelString[500];
char *Port = "LPT2";
strcpy(LabelString, "A");
strcat(LabelString, "V25H380OB");
strcat(LabelString, "20041201152631");
strcat(LabelString, "V25H750XU");
strcat(LabelString, "Mgr: 2130");
strcat(LabelString, "V40H750XU");
strcat(LabelString, "DLL: 1125");
strcat(LabelString, "V80H250XU");
strcat(LabelString, "Print Count > 25000");
strcat(LabelString, "V105H250XU");
strcat(LabelString, "Print Count > 25000 *");
strcat(LabelString, "V130H250XU");
strcat(LabelString, "Print Count > 25000");
strcat(LabelString, "V155H250XU");
strcat(LabelString, "Print Count > 25000");
strcat(LabelString, "V180H250XU");
strcat(LabelString, "Print Count > 25000 *");
strcat(LabelString, "V205H250XU");
strcat(LabelString, "Print Count > 25000");
strcat(LabelString, "V230H250XU");
strcat(LabelString, "Print Count > 25000 *");
strcat(LabelString, "Q1Z");
Retry:
HANDLE hCom =
CreateFile(Port,GENERIC_READ|GENERIC_WRITE,NULL,NULL,OPEN_EXISTING,FILE_FLAG_OVERLAPPED,NULL);
if(hCom == INVALID_HANDLE_VALUE)
{
edtStatus->Text = "Error. Printer Offline";
return;
}
WriteFile(hCom, LabelString, strlen(LabelString), &numsent, &overlapped);
WaitForSingleObject(overlapped.hEvent, 1000);
GetOverlappedResult(hCom, &overlapped, &numsent, FALSE);
CloseHandle(hCom);
if(numsent < strlen(LabelString))
{
edtStatus->Text = "Error. Printer Offline";
return;
}
}

Painting text problem

__makaveli__13-Dec-04 4:30

__makaveli__

13-Dec-04 4:30

I am trying to paint some text in a window and have it change colour when the mouse is over it, I am using the code:

case WM_PAINT:
{
HFONT pOldFont;
char *szBuffer;
CRect rcClient;
PAINTSTRUCT ps;
COLORREF col;
HFONT hNewFont;
BITMAP bm;

HDC hDC = BeginPaint(data->m_hWnd, &ps);
HDC hdcMem = CreateCompatibleDC(hDC);
HBITMAP hbmOld = (HBITMAP)SelectObject(hdcMem,m_biBackground);
GetObject((HBITMAP)>m_biBackground, sizeof(bm), &bm);

BitBlt(hDC, 0, 0, data->m_nWidth, data->m_nHeight, hdcMem, 0, 0, SRCCOPY);

SetBkMode(hDC, TRANSPARENT);

rcClient.DeflateRect(10,20,10,20);

if (m_bMouseIsOver)
{
col = RGB(GetRValue(m_crSelected),GetGValue(data->m_crSelected),GetBValue(data->m_crSelected));
hNewFont = (HFONT)data->m_hSelectedFont;
}
else
{
col = RGB(GetRValue(data->m_crNormal),GetGValue(data->m_crNormal),GetBValue(data->m_crNormal));
hNewFont = (HFONT)data->m_hNormalFont;
}

szBuffer=new char[strlen(data->m_strCaption)+10];
strcpy(szBuffer,m_strCaption);

pOldFont=(HFONT)SelectObject(hDC, &hNewFont);
SetTextColor(hDC, col);

DrawText(hDC, szBuffer,-1,data->m_rcText,DT_CENTER | DT_VCENTER | DT_WORDBREAK | DT_END_ELLIPSIS);

delete[] szBuffer;
SelectObject(hDC, pOldFont);
SelectObject(hdcMem, hbmOld);
DeleteDC(hdcMem);

EndPaint(data->m_hWnd, &ps);

return 0;
}

I can see that it is selecting the correct colour because the variable 'col' contains the right value at the right time.

But the text displayed is always the first colour, I must be missing something simple, any ideas what???

Helppp cant figure this out

James198513-Dec-04 3:24

James1985

13-Dec-04 3:24

OK guys well im sorta finished with my final project but i cant get it to work CORRECTLY. The program is to have a menu and ask the user to choose betweetn add, subtract, mult and divide. when they choose whatever one it will ask them a simple question. and if they get the correct answer or wrong answer it will ask them again if they want another problem. If they choose yes then it will give em another problem but if they choose no it will go back to the menu. I cant seem when they enter no it keeps say "enter another seed vaule" I want it to go back to the menu. Well here is the code. O and if they enter anything besides Y or N i need it to say sorry that is an incorrect choice. Here is the code:

#include
#include
#include
using namespace std;

int main()
{
int choice; float num1, num2, answer, correct;
char again;
unsigned seed;
do
{
cout << "\n\t\tSimple Math Tutor Menu\n\n";
cout << "1. Addition\n";
cout << "2. Subtraction\n";
cout << "3. Division\n";
cout << "4. Multiplication\n";
cout << "5. Quit The Program\n\n";
cout << "Please enter a choice: ";
cin >> choice;
if (choice <1 || choice >5)
{
cout << "Sorry that is an incorrect choice!"<<endl;
cout <<="" "please="" enter="" another="" choice="" "<<endl;
cin="">> choice;
}
cout<<"Enter a seed value: ";
cin>>seed;
srand(seed);
num1 = 1 + rand() % 10;
num2 = 1 + rand() % 10;

switch (choice)
{

case 1 : do
{

cout << "What is the sum of "<< num1 << " and " << num2 <<endl;
cin>> answer;
correct = num1 + num2;
if ( answer == correct)
{
cout << "Congratulations you are correct!" <<endl;
}
else
{
cout="" <<="" "sorry="" that="" was="" incorrect"="" <<endl;
cout="" "the="" correct="" answer="" was:="" "="" <<endl;

}
cout="" "would="" you="" like="" to="" do="" another="" problem="" (y="" n)?="" ";
cin="">> again;
cout<<"\nEnter another seed value: ";
cin>>seed;
num1 = 1 + rand() % 10;
num2 = 1 + rand() % 10;
}while (again=='y' || again=='Y');
if (again != 'y' || again !='Y')
cout << "Sorry That is an incorrect choice" <

Re: Helppp cant figure this out

jmkhael13-Dec-04 3:53

jmkhael

13-Dec-04 3:53

James1985 wrote:
cin>>seed;
num1 = 1 + rand() % 10;
num2 = 1 + rand() % 10;

Why twice ??
Why not remove the bottom lines?

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

Re: Helppp cant figure this out

toxcct13-Dec-04 7:56

toxcct

13-Dec-04 7:56

Papa wrote:
cin>>seed;
num1 = 1 + rand() % 10;
num2 = 1 + rand() % 10;

Why twice ??
Why not remove the bottom lines?
because one affects num1, and another affects num2.

num1 might be different of num2, but only if srand() if called...
why srand(seed) is not called after the cin... Confused | :confused:

sorry, don't know.

TOXCCT >>> GEII power
[toxcct][VisualCalc]

How to pop system menu in an owner-draw dialog

max_xiayi13-Dec-04 3:01

max_xiayi

13-Dec-04 3:01

i write a dialog with a skin.The dialog has no style of SYSTEM_MENU,therefore, it has no menu when you click the minimized icon on the task bar.How to pop up it?

please contact:
max_xiayi@hotmail.com

DCOM Question

Anonymous13-Dec-04 3:00

Anonymous

13-Dec-04 3:00

Hey Guys,

I create an empty out-of-process EXE COM which I exposed a HelloWorld interface to display a message box with "Hello".
and I create a client to connect to the COM object and use the interface to execute the message box.

The Client connects fine locally, but I'm having trouble connecting remotely, one the remote machine I'm getting error number 5.not sure what it means.

Any ideas, feedback or if someone has a working sample of this simple scenario I would appreciate it.

Here is the code for my client:
void CTestclientDlg::OnOK()
{
HRESULT hResult;
ITestInterface *pTS = NULL;

COSERVERINFO CoServerInfo;
memset(&CoServerInfo, 0, sizeof(CoServerInfo));
CoServerInfo.pwszName =_bstr_t("\\\\ServerName") ;

// structure for CoCreateInstanceEx
MULTI_QI qi;
memset( &qi, 0, sizeof(qi));

// Fill the qi with a valid interface
qi.pIID = &IID_ITestInterface;

CoInitializeSecurity (NULL, -1, NULL, NULL, RPC_C_AUTHN_LEVEL_CONNECT, RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE, NULL);

hResult = CoInitialize( 0 );

if( SUCCEEDED( hResult ) )
{
hResult = CoCreateInstanceEx( CLSID_TestInterface, NULL, CLSCTX_REMOTE_SERVER, &CoServerInfo, 1, &qi );

if( SUCCEEDED( hResult ) )
{
pTS = (ITestInterface*)qi.pItf;
pTS->SayHello( );
}
else
{
DWORD eCode = HRESULT_CODE(hResult);

CString Err;
Err.Format( "%d", eCode );
AfxMessageBox( Err);
}
}
CoUninitialize( );
}

how to convert string to binary

Abhi Lahare13-Dec-04 1:45

Abhi Lahare

13-Dec-04 1:45

Hi all,

I am using blowfish algo for string encryption. but it fails to encrypt the plain text in some cases. To solve above problem,
For that i am writing a text in a some file opened in binary mode
and then again reading the buffer from file and sending this buffer to the
encryption function.

1.Is there a better way of doing the same ?
2.How can one convert a simple plain text into binary format?. Also how can i can combine the plain text and binary text?

Thanks in advance.
Abhishake

Re: how to convert string to binary

valikac13-Dec-04 4:57

valikac

13-Dec-04 4:57

Post an example code.

Kuphryn

tooltips for controls inside groupbox

V.13-Dec-04 0:49

13-Dec-04 0:49

Hi,

I have some controls in a groupbox, the only way I was able to view the tooltips was when the groupbow was invisible.

I put the groupbox as first control in my .rc file, bust still it didn't worked.

I also tried searching msdn, but couldn't find anything that could solev this.

tnx for your help !!

"If I don't see you in this world, I'll see you in the next one... and don't be late." ~ Jimi Hendrix

Re: tooltips for controls inside groupbox

PJ Arends13-Dec-04 7:11

PJ Arends

13-Dec-04 7:11

The groupbox must come after the controls in the Z order and you must make sure that the group box itself does not have a tooltip associated with it.

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04

Within you lies the power for good - Use it!

Re: tooltips for controls inside groupbox

V.13-Dec-04 7:24

13-Dec-04 7:24

PJ Arends wrote:
The groupbox must come after the controls in the Z orde

How do you do that? I searched for that solution too, but I couldn't figure out the SetWindowPos function. (there was another possible candidate function, but I forgot the name)

"If I don't see you in this world, I'll see you in the next one... and don't be late." ~ Jimi Hendrix

Re: tooltips for controls inside groupbox

PJ Arends13-Dec-04 7:50

PJ Arends

13-Dec-04 7:50

In the dialog editor you can set the tab order, make the group boxes the last controls in the tab order.

In the rc file, place the group boxes at the bottom.

If you are using SetWindowPos() use HWND_TOP as the hWndInsertAfter parameter.

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04

Within you lies the power for good - Use it!

Re: tooltips for controls inside groupbox

V.13-Dec-04 8:58

13-Dec-04 8:58

PJ Arends wrote:
In the dialog editor you can set the tab order

I know, that was the first thing I've tried... Frown | :(

I'll try the SetWindowPos again, I'm thinking it could be a combination of things...

tnx, for the reply.

"If I don't see you in this world, I'll see you in the next one... and don't be late." ~ Jimi Hendrix

Re: tooltips for controls inside groupbox

toxcct13-Dec-04 8:02

toxcct

13-Dec-04 8:02

Ctrl+D in the dialog editor (resource editor, but for dialogs... Big Grin | :-D

)

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Re: tooltips for controls inside groupbox

V.13-Dec-04 8:55

13-Dec-04 8:55

tnx for the reply, but that was the first thing I've tried... Frown | :(

(and obviously it didn't work.)

Could it be a combination of things...?

"If I don't see you in this world, I'll see you in the next one... and don't be late." ~ Jimi Hendrix

Cool tools?

ManOfTheYear13-Dec-04 0:37

ManOfTheYear

13-Dec-04 0:37

Hi Guys

Im new to the forum and programming!! Im using Visual C++ .NET and want to know if there are any tools out there to help me?

THanks!!

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