C / C++ / MFC Discussion Boards

Anonymous23-Jul-02 20:04

23-Jul-02 20:04

I've a COM object in VC++ that has setData(PBYE* pdata, int nsize) function. What's the equivalent of it in IDL, so in VB it can pass the data to the COM.

Moreover, what's the way VB pass the data to it ?

Re: Pass BYTE Array from VB to ATL COM

Christian Graus23-Jul-02 20:22

Christian Graus

23-Jul-02 20:22

what is PBYE ? If you want to pass a string into COM it will need to be a BSTR. VB will convert a string literal or value for you, AFAIK.

Christian

come on all you MS suckups, defend your sugar-daddy now. - Chris Losinger - 11/07/2002

Re: Pass BYTE Array from VB to ATL COM

Anonymous23-Jul-02 20:39

Anonymous

23-Jul-02 20:39

Sorry, it should be PBYTE (in C++, a pointer to byte). I'm not going to pass String values, I want to pass binary data to an COM object.

How to get properties of control.

Raman Chilukuri23-Jul-02 19:16

Raman Chilukuri

23-Jul-02 19:16

Dear friends, How to get properties of any control ie created by any application (not window styles, extended styles) eg: Delphi.

waiting for reply

Thanks,
Raman.

How can I do it in Mscomm control?

glinda23-Jul-02 16:29

glinda

23-Jul-02 16:29

I want to make a serial port communication program. I define a STRUCT variable
struct _COMM_PACK
{
char sID[PACK_ID_LEN];
BYTE cCmdCode;
UINT nVerifySum;
int nDataLen;
BYTE cData[MAX_DATA_LEN];
}aSendPack;
and want to send 'aSendPack'in the Mscomm control-comm like:
comm.SetOutput(aSendPack);
but the SetOutput need a VARIANT variable
how can I do that?
thanx!

Re: How can I do it in Mscomm control?

NormDroid23-Jul-02 22:24

NormDroid

23-Jul-02 22:24

! DONT use the MSCOMM control !

If you have to one would...

aSendPack var;

ZeroMemory(&var,sizeof(var));

var.cCmdCode = 0x0100;
etc. etc.....

and finally

comm.SetOutput((char*) &var);

Normski. - the next bit of code is self modifying ... jmp 0xCODE

How to Add Start menu shortcut in Setup program

a3gupta23-Jul-02 15:22

a3gupta

23-Jul-02 15:22

Hello,

I am using Installshield for VC++ 6.0 to build a setup program for my program. I was wondering how can I add a shortcut in the startmenu for my programs exe file in the start menu.
Right now .. I am using the follwing code to make the icon in the startmenu

svPath = TARGETDIR ^ "TDMS2000.exe";
LongPathToQuote ( svPath , TRUE );
AddFolderIcon (FOLDER_PROGRAMS^SHELL_OBJECT_FOLDER , "TDMS2000" , svPath , "" , "" , 0 , "" , REPLACE );

But there is a problem with this code. My program needs a .dat file to start that resides in the same directory as the exe file. So when I follow the link created in my start meny using the code above .. the program fails to see that .dat file. When I create a shortcut manually and place it in the start menu .. the program works file.

I will really appreciate any solution to this problem. Thanks!

Sincerely,
Anjum.

Re: How to Add Start menu shortcut in Setup program

super23-Jul-02 23:32

super

23-Jul-02 23:32

I think the problem is not with the insatalshield but in ur application code..
Ur reading for sat file may be wrong..(i.e)The path u have given for reading the .dat file is relative with ur exe....So the application is searching is the oath where start menu short cut resides....
U have to explictily give the full path of ur exe dor reading the .dat file..
If u can give the code for reading of .dat file and i can clearly analaysis the problem Big Grin | :-D

cheers,
Super
------------------------------------------
Too much of good is bad,mix some evil in it

Re: How to Add Start menu shortcut in Setup program

a3gupta23-Jul-02 23:52

a3gupta

23-Jul-02 23:52

Mani,

Thanks for your response. Yes, I am using a relative path, but I was doing it thinking that since the user may choose to install the my program under any folder, I should give a relative so that it will be able to open the my .dat file as long as they are together in one folder regardless of the folder chosen by the user during installation.
When I manually create a short cut of my EXE file and put it on the desktop or in the start menu .. it reads the .dat file fine. I was thinking that an icon created by the setup program should work the same way.

I am attaching my code. Thanks for looking into it.

<br />
       //open config file to read institute name information;<br />
	char *pszFileName="config.dat";<br />
	char pszIName[256];<br />
	CFile myFile;<br />
	CFileException fileException;<br />
	if ( !myFile.Open( pszFileName, CFile::modeRead, &fileException ))<br />
	{<br />
		::MessageBox(NULL, "File doesnt exist ","Warning",MB_OK);<br />
       <br />
	}

Also I have a trivial question. Why do I have to put :: before Messagebox function sometimes to make it work. Sometimes it is works without the dots.
As you can probably see that I do lack some of basic knowledge of MFC. Smile | :)

Thanks for your help!

Sincerely,
Anjum.

Re: How to Add Start menu shortcut in Setup program

super24-Jul-02 1:17

super

24-Jul-02 1:17

Yeah thats the problem.......
U should nver give the relative path..I will not work...In this code when u run with start menu it will search the folder of startmenu and never the exe..So its better u use Absolute path of exe...
So use this piece of code..

<br />
CString StrLaunched;<br />
TCHAR szFullPath[MAX_PATH];<br />
TCHAR szDir[_MAX_DIR];<br />
TCHAR szDrive[_MAX_DRIVE];<br />
::GetModuleFileName(NULL,szFullPath,MAX_PATH);<br />
_splitpath(szFullPath, szDrive, szDir, NULL, NULL);<br />
StrLaunched.Format(_T("%s%s"), szDrive, szDir);<br />
char *pszFileName=StrLaunched+"config.dat";<br />

This will work.....
Then :: means ur calling an Windows Sdk function Big Grin | :-D

cheers,
Super
------------------------------------------
Too much of good is bad,mix some evil in it

left scroll bar

Steve L.23-Jul-02 13:25

Steve L.

23-Jul-02 13:25

I can't seem to get the scroll bar of my edit box to display on the left. I've tried using the left scroll bar style but the scroll bar stays on the right. How do I get it to display on the left.

-Raffi

Re: left scroll bar

Peter Occil23-Jul-02 16:23

Peter Occil

23-Jul-02 16:23

Scroll bars can be aligned to the left (using the WS_EX_LEFTSCROLLBAR style), but they take effect only in Hebrew and Arabic versions of Windows 95 (and any languages whose characters can be read from the right).

You give no reason for which a left-aligned scroll bar would be beneficial.

Peter O.

I get an error when using DAO with Text files

achandra00723-Jul-02 12:32

achandra007

23-Jul-02 12:32

I get the following error when I use DAO with a text file:

<filename> is not a valid file path. ...

Could someone tell me what I am doing wrong?

CString sFile = "c:\\ashish.txt";
CDaoDatabase db;
CDaoRecordset rs;

db.Open(sFile,FALSE,TRUE,"Text;");
.
.
.

Thanks
ashish

How do I use insertion mark in the ListView control?

Hiusing23-Jul-02 12:17

Hiusing

23-Jul-02 12:17

Hello,
The msdn document says the insertion mark is available for windows XP
Visual Styles. But I don't see this the insertion mark present even I have
a manifests in my program. Do you have any idea how to enable it?

Thanks,
Hiusing

Re: How do I use insertion mark in the ListView control?

Joaquín M López Muñoz23-Jul-02 12:48

Joaquín M López Muñoz

23-Jul-02 12:48

Searching thru MSDN, I found the following footnote at http://msdn.microsoft.com/library/default.asp?url=/library/en-us/shellcc/platform/CommCtls/ListView/ListView_Overview.asp:

Note For the messages, notifications, and structures used with grouping, insertion marks, and tile-view, see the list-view documentation in the Platform SDK.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Dialog App how do I get VK_RIGHT???

Anonymous23-Jul-02 11:51

Anonymous

23-Jul-02 11:51

I need to get VK_RIGHT but I cant seem to figure this out...

void CAlienMemoryDlg::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags)
{
// key is pressed
int x;
x = -1;
CDC *xDC=GetDC();
switch(nChar)
{
case VK_DOWN: // down arrow key
{
break;
}
case VK_UP: // up arrow key
{
break;
}
case VK_RIGHT: // right arrow key
{
m_CurrSelected++;
if (m_CurrSelected > 11)
m_CurrSelected = 0;
x = 0;
break;
}
case VK_LEFT: // left arrow key
{
m_CurrSelected--;
if (m_CurrSelected < 0)
m_CurrSelected = 11;
x = 1;
break;
}
}
if (x > -1) {
Game.SelectImage(m_CurrSelected,xDC,x);
}
CDialog::OnKeyDown(nChar, nRepCnt, nFlags);
}
VK_LEFT works but VK_RIGHT doesnt

Re: Dialog App how do I get VK_RIGHT???

Joaquín M López Muñoz23-Jul-02 11:55

Joaquín M López Muñoz

23-Jul-02 11:55

PreTranslateMessage is the answer. Check Nishant S' Keyboard messages/accelerators handling in MFC dialog based applications.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

OLE Drag Drop without MFC

CaesarCZ23-Jul-02 11:50

CaesarCZ

23-Jul-02 11:50

Hi!
can anybody help me out with it? I need to write a MFC-free app that supports drag-drop via OLE (I use the WM_DROPFILES method already but it's not sufficient). I have a hard time figuring it out. Even MSDN says use COleDataSource as if nobody ever programmed for WinAPI (Is there anybody out there/Pink Floyd). Can anybody give me some clues? A snippet would be COOL. Thanks a lot

losing stdin when redirecting stdout and stderr

Peter Weyzen23-Jul-02 11:19

Peter Weyzen

23-Jul-02 11:19

I seem to be losing my 'stdin' when I redirect my stdout/stderr (using freopen). Better put, the stdin seems to become flaky...

Does this make sense to anyone?

Is there a better way to get keystrokes from a (DOS/console/Win2k) app than using getch()? w/o using an event loop?

Thanks in advance....!

drag drop, list view

C^hris L^osinger23-Jul-02 9:48

C^hris L^osinger

23-Jul-02 9:48

has anyone here ever sucessfully implemented smooth drag-n-drop for a listctrl in 'icon' view ?

i've searched the web for days for a way to do it (yes, i've seen codeguru) , but everything i've found and everything i've tried results in horrible flicker.

fyi, the flicker is casued because, in MouseMove, UpdateWindow on the listctrl to redraw what the drag image has uncovered, then i redraw the drag image in the new spot. so, each move, i have to redraw the list, the redraw the drag image.

i've tried all kinds of variations on LockWindowUpdate, DragShowNolock, UpdateWindow, etc... nothing seems to get rid of the flicker.

-c

To explain Donald Knuth's relevance to computing is like explaining Paul's relevance to the Catholic Church. He isn't God, he isn't the Son of God, but he was sent by God to explain God to the masses.
/. #3848917

Fractals!

Re: drag drop, list view

CaesarCZ23-Jul-02 11:45

CaesarCZ

23-Jul-02 11:45

there are some articels called flicker free MFC or what. you double buffer your listview and it doesn flicker no more...

btw. anyone knows how to do drag and drop WITHOUT MFC (pure WinAPI)?

Re: drag drop, list view

l a u r e n23-Jul-02 12:27

l a u r e n

23-Jul-02 12:27

its a bitch apparently
try looking thru the mfc source for the drag and drop they implemented ... it might be a good starting point

"... and so i said to him ... if it don't dance (or code) and you can't eat it either f**k it or throw it away"
sonork: 100.18128 8028finder.com

Re: drag drop, list view

Shog⁹23-Jul-02 17:58

Shog⁹

23-Jul-02 17:58

What all are you doing in your drag? Just moving a drag image over the list, or are you drawing insertion marks, etc.? I've never had serious problems with the first, but *always* get something wrong with the second.

Shog⁹
--

Maybe Java is kind of like God, it "works in mysterious ways". It seems like your apps are running slowly, because in the backgroud Java is solving world hunger, or finding the cure to cancer.
- Ryan Johnston, Don't die java!

Re: drag drop, list view

Bhikshapathi Gorantla23-Jul-02 19:07

Bhikshapathi Gorantla

23-Jul-02 19:07

The same thing I want to do.I have two list views .Left list contains directories,subdirectories and files. I should be able to select some part of the list and should be able to drag and drop into the right pane(or list view) and copy these dirctoris and files into a particular location.How can implement this?Any existing code is there so that I can resuse it in my application?
please help me.I am running out of deadlines.
Thanks in advance.

Pathi

Pathi

Re: drag drop, list view

Shog⁹24-Jul-02 6:03

Shog⁹

24-Jul-02 6:03

Check out this article, and also the Shell Programming sections.

Shog⁹
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