A convertion questioa - C / C++ / MFC Discussion Boards

Re: Posting messages

Tom Wright28-Apr-05 11:41

Tom Wright

28-Apr-05 11:41

you think? Hum..I give it a try. Thanks
Tom

Tom Wright
tawright915@yahoo.com

Re: Posting messages

Michael Dunn28-Apr-05 14:21

Michael Dunn

28-Apr-05 14:21

Tom Wright wrote:
Can you not send a pointer between two different apps?

Short answer: no. Each process has its own process space, memory from one is not visible in others, and addresses in one are meaningless in others. You need to use an IPC mechanism, WM_COPYDATA will probably be easiest since you're already using message to communicate.

--Mike--
Visual C++ MVP Cool | :cool:

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Re: Posting messages

Tom Wright29-Apr-05 4:33

Tom Wright

29-Apr-05 4:33

I'm trying to pass a struct with the WM_COPYDATA. How would I receive this on the receving side of my app. Currently this is how I'm doing it right now:

ConnStatus *cConnStatus;
//CString strRecievedText = (LPCSTR) (pCopyDataStruct->lpData);
memcpy(cConnStatus, pCopyDataStruct->lpData, pCopyDataStruct->cbData);
AfxMessageBox(cConnStatus->cID);

I get an assert error, and I think it's because I'm trying to pass lpdata to a pointer to my struct.

Do you have any suggestions on how to do this?

Thanks

Tom Wright
tawright915@yahoo.com

Re: Posting messages

Michael Dunn29-Apr-05 6:28

Michael Dunn

29-Apr-05 6:28

To send just a string, do this in the sending side:

COPYDATASTRUCT cds = {0};
CString sTheData = _T("foobar");
cds.lpData = (LPCTSTR) sTheData;
cds.cbData = (sTheData.Length()+1)*sizeof(TCHAR);

In the receiving side:

BOOL CAppWindow::OnCopyData ( HWND hwndSrc, COPYDATASTRUCT* pcds )
{
CString s = (LPCTSTR) pcds->lpData;
}

If you have a whole struct, you need to get all the data into one contiguous buffer so the system can copy it into shared memory for the target process to use.

--Mike--
Visual C++ MVP Cool | :cool:

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defining global variables

Oriented28-Apr-05 9:12

Oriented

28-Apr-05 9:12

i'm using VC++6;
i want to declare a global variable(i.e., to be seen in all the classes of the app)
i tried to declare it n CMyApp ( : public CWinApp) but an error message (undeclared identifier) usually appears..
regards.
keep the matter as simple as it can be !!

Re: defining global variables

Maximilien28-Apr-05 9:42

Maximilien

28-Apr-05 9:42

what errror ? and where does the error appears ?

you need to #include your app class .h file in the files you will access CMyApp

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: defining global variables

Anonymous28-Apr-05 18:07

Anonymous

28-Apr-05 18:07

hi
ypu can declare the "extern int <variable name>" in your stdafx.h the applications global file where you have to use that variable again declare there in that header file your change will affect to the original global variable.

I think this works

Best Regards
ganesh

A convertion questioa

jcmoscon28-Apr-05 7:54

jcmoscon

28-Apr-05 7:54

I have this code:
//BEGIN ====================
IP_ADAPTER_INFO AdapterInfo[16];// Allocate information for up to 16 NICs
DWORD dwBufLen = sizeof(AdapterInfo);// Save the memory size of buffer
DWORD dwStatus = GetAdaptersInfo(// Call GetAdapterInfo
AdapterInfo,// [out] buffer to receive data
&dwBufLen); // [in] size of receive data buffer

PIP_ADAPTER_INFO pAdapterInfo = AdapterInfo;// Contains pointer to current adapter info

//END========================

I want to convert the pAdapterInfo->Address to a std::string
Can anybody help me on this?
Thanks in advance.
Julio

Re: Converting unsigned char to std::string

Moscon28-Apr-05 9:57

Moscon

28-Apr-05 9:57

Well,
It worked pretty well:

std::string MACData2String (unsigned char MACData[]){
std::string tmp;
char slask[100];
sprintf(slask,"%02X-%02X-%02X-%02X-%02X-%02X", MACData[0], MACData[1], MACData[2], MACData[3], MACData[4], MACData[5]);
tmp=slask;
return tmp;
}

Open .col files?

Dominik Reichl28-Apr-05 7:33

Dominik Reichl

28-Apr-05 7:33

Hello!

How can I open .col files with hh.exe? I already installed the latest version of HtmlHelp Workshop and tried to run the hhupd.exe, but it tells me that I got a newer version already (I'm using Windows XP SP2).

Do I have to install any update? How to make hh.exe open .col files?

Thanks in advance and best regards
Dominik

_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??
(doesn't work on NT)

Re: VB.NET to Open, edit save as Word .doc or .dot

David Crow28-Apr-05 7:10

David Crow

28-Apr-05 7:10

alcowboy wrote:
I am very new to using VB.NET.

Is that why you posted to the VC++ forum? Try here for a better response.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

CEdit and Numeric. is it possible for floats

ugur_basak28-Apr-05 5:50

ugur_basak

28-Apr-05 5:50

Hi, i got a little problem.
In CEdit if we set Number=true we can only enter numerical characters and if we press a non-numeric char, there is an "information message"

My question,

1) is it possible to use something to accept "." s for floating numbers

2) if 1st one is not possible, is there any way to show that information message while not using Number=true format.

Thanks

Re: CEdit and Numeric. is it possible for floats

David Crow28-Apr-05 6:02

David Crow

28-Apr-05 6:02

If you need floating-point numbers, you'll need to use a custom (masked) edit control. There are several here at CP.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: CEdit and Numeric. is it possible for floats

ugur_basak28-Apr-05 6:06

ugur_basak

28-Apr-05 6:06

OK. How can i show windows information message about numeric characters

Re: CEdit and Numeric. is it possible for floats

David Crow28-Apr-05 7:08

David Crow

28-Apr-05 7:08

I don't understand your question.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: CEdit and Numeric. is it possible for floats

ugur_basak28-Apr-05 22:09

ugur_basak

28-Apr-05 22:09

OK. in CEdit when we choose number=true, and we enter a non-numeric character there is an error message like a tooltip. that writes something like not to enter non-numeric characters. Can i call that tooltip(or whatever it is), while not using number=true format.

Re: CEdit and Numeric. is it possible for floats

David Crow29-Apr-05 2:43

David Crow

29-Apr-05 2:43

ugur_basak wrote:
Can i call that tooltip(or whatever it is), while not using number=true format.

Yes, check out CWnd::EnableToolTips() as well as the CToolTipCtrl class.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

CString pre-pend

Member 170252928-Apr-05 5:38

Member 1702529

28-Apr-05 5:38

HI all,
is it possible to pre-pend to a CString as opposed to append, ie place a new string at the start of the string instead of the end. Thanks
Shane

Re: CString pre-pend

David Crow28-Apr-05 5:41

David Crow

28-Apr-05 5:41

Yes, just switch the order of the operands. Something like:

CString name("is David");
name = "My name " + name;

Make sense?

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: CString pre-pend

Michael Dunn28-Apr-05 5:41

Michael Dunn

28-Apr-05 5:41

CString s = _T("Project");
s = _T("Code") + s;

--Mike--
Visual C++ MVP Cool | :cool:

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Re: CString pre-pend

Larry J. Siddens29-Apr-05 4:55

Larry J. Siddens

29-Apr-05 4:55

You can also use the Insert.

Insert( int, PCXSTR );
Insert( int, XCHAR );

Example:

CString test( "is a test" );
test.Insert( 0, "This " );

Larry J. Siddens

Re: CString pre-pend

Member 170252928-Apr-05 5:44

Member 1702529

28-Apr-05 5:44

Thanks guys, stupid of me to not even think of that!!!

Message to Bottom of the Main Window

jerry1211a28-Apr-05 5:36

jerry1211a

28-Apr-05 5:36

I have a VC++ application with tab views in the main window. I wish to be able to send some information and have it displayed in the lower portion of the main window. There are 3 shaded boxes for information along the lower right edge of the main window now. How can I access and write to those location?? Just not sure how to do it.

Thanks.
Jerry
Smile | :)

Re: Message to Bottom of the Main Window

Ravi Bhavnani28-Apr-05 8:43

Ravi Bhavnani

28-Apr-05 8:43

See CStatusBar.

/ravi

My new year's resolution: 2048 x 1536
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Opening Access Database

thetuxpenguin28-Apr-05 5:32

thetuxpenguin

28-Apr-05 5:32

I would like to get some code for opening a Access database. So that I can use an Excutable to open a the database rather than the .mdb Im not that familuar with Visual C++ but thats all I have avalible to me but I do know the basics Thanks for any help.

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