C / C++ / MFC

17-Oct-02 2:22

(Using VC++ 6)
I need to obtain the full filename of a dll that is being instantiated as a COM interface.

I am aware of the "GetModuleFileName" procedure and the relevance of the first parameter: NULL gives you the calling exe file, right? Well, I still get the same filename if I use the Instance, so I must be doing something screwy?? I've resorted to hardcoding the dll filename as a constant at the moment, which gets me off the hook temporarily, but this approach won't work indefinitely, so any help is much appreciated.

Code snippet:

CWinApp* App = AfxGetApp ();<br />
	HINSTANCE  hInstance = App->m_hInstance;<br />
	<br />
//hInstance = AfxGetInstanceHandle(); <br />
//I tried this just in case, but returns the same value as m_hInstance<br />
<br />
	TCHAR	cFileName[_MAX_PATH];<br />
	GetModuleFileName (hInstance, cFileName, _MAX_PATH);<br />

Ta!

Debbie

Tomasz Sowinski17-Oct-02 2:25

17-Oct-02 2:25

HINSTANCE stored in your app may refer to .exe. Try to store/use HINSTANCE passed to DllMain.

Tomasz Sowinski -- http://www.shooltz.com

*** Purgamentum init, exit purgamentum ***

Debs17-Oct-02 2:42

17-Oct-02 2:42

I did read about that in a google search. However (and I'm showing my ignorance here!) this is the first ever DLL I've created myself, and I generated it using the MFC dll wizard: I can't find that procedure *anywhere*! If someone could point me in the right direction it would be much appreciated.

Ta!

Debbie

Tomasz Sowinski17-Oct-02 2:47

17-Oct-02 2:47

There's a function called DllMain in your .dll project. It's called by Windows during initialization of your .dll and gets the right HINSTANCE. You can store HINSTANCe somewhere or call GetModuleFileName right in DllMain.

DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID lpReserved)
{
	char buf[1024];
	GetModuleFileName(hInstance, buf, sizeof(buf));
	...
}

To find DllMain, expand 'Globals' item in ClassView.

Tomasz Sowinski -- http://www.shooltz.com

*** Purgamentum init, exit purgamentum ***

Debs17-Oct-02 3:02

17-Oct-02 3:02

Hi,

Thanks for the advice. My orignal probelm appears to be sorted, (see other post), but I would like to understand a bit more about it.

My Globals don't contain a DllMain function (unless I need new glasses Cool | :cool:

, I did look, honest!).

It has 4 functions DLLCanUnloadNow; DLLGetClassObject; DllRegisterServer and DllUnregisterServer. This is a COM interface, maybe that makes a difference?

I'm afraid I'm very new to both DLLs and COM. It appears to be working (amazingly), but it's a bit like black magic atm. Maybe all will become clear in time. I do hope so!

Ta!

Debbie

Debs17-Oct-02 2:53

sizing ListCtrl and columns

17-Oct-02 2:53

I still haven't found the DllMain method, but I have sussed out that I can access the _Module directly (having had a look at the DllGetClassObject method. This does seem to do the trick in giving me the right filename. I'm not exactly sure that I fully understand it, yet, though!

<br />
        HINSTANCE hMine = _Module.m_hInst;<br />
	GetModuleFileName (hMine, cFileName, _MAX_PATH);<br />

Idefix17-Oct-02 1:38

Idefix

17-Oct-02 1:38

hi,

I have a sizeable ListCtrl in a FromView.
The ListCtrl has a report style.
Additionally I want to size the column of the
ListCtrl when sizing.

But the scrollbars don't want what I want.
When the row count grows up and the horizontal
scrollbar is shown the vertical scrollbar
is shown, but it is not nessaray.
Second it is liable to run around. When the first
column width was changed the headerctrl
sends a WM_SIZE to the listctrl.

How can I avoid this.

<br />
MyFormView::OnSize(...)<br />
{<br />
  m_ListCtrl.::MoveWindow(...,..., TRUE);<br />
}<br />
<br />
MyListCtrl::OnSize(UINT nType, int cx, int cy) <br />
{<br />
        int iCol;<br />
	int nCols =GetHeaderCtrl()->GetItemCount();<br />
	int nWidth=0;<br />
	RECT rect;<br />
	float f;<br />
	SCROLLINFO scrinfo={0};<br />
	CHeaderCtrl* pHdr=GetHeaderCtrl();<br />
	HDITEM hdi={0};<br />
<br />
	CListCtrl::OnSize(nType, cx, cy);<br />
<br />
	for(iCol=0;iCol<nCols;iCol++)<br />
	{<br />
		pHdr->GetItemRect(iCol,&rect);<br />
		nWidth+=rect.right-rect.left;<br />
	}<br />
	<br />
	GetScrollInfo(SB_VERT,&scrinfo);<br />
	if(scrinfo.nPage<=scrinfo.nMax)<br />
	{<br />
		GetClientRect(&rect);<br />
		cx=rect.right-GetSystemMetrics(SM_CXVSCROLL);<br />
	}<br />
<br />
	f=(float)(cx)/(float)(nWidth);<br />
	<br />
<br />
	hdi.mask=HDI_WIDTH;<br />
	for(iCol=0;iCol<nCols;iCol++)<br />
	{<br />
		pHdr->GetItem(iCol,&hdi);<br />
		hdi.cxy=f*hdi.cxy;<br />
		pHdr->SetItem(iCol,&hdi);<br />
		<br />
	}<br />
}<br />
<br />

worrisome exception

ns17-Oct-02 1:32

17-Oct-02 1:32

My app works fine as far as I know. But I just noticed that when I am in debug mode with breakpoints and it loads up until the UI appears, the output window says "First Chance Exception" in two places. Yet the app does fine (as far as I know I hasten to add). Do I need to worry and if so, how do I fix this problem?

Appreciate your help,
ns

Re: worrisome exception

Prem Kumar17-Oct-02 1:49

Prem Kumar

17-Oct-02 1:49

Hi, first chance exceptions are generally c++ exceptions
like possibly in MFC, you can safely ignore them.

Re: worrisome exception

ns17-Oct-02 1:52

17-Oct-02 1:52

Ah! I was starting to get really despondent about this, my latest discovery (I have other stuff to do), and thought I'd done some horrendous thing somewhere which will show up sometime. I am so relieved!
Thanks,
Big Grin | :-D

Appreciate your help,
ns

Re: worrisome exception

Tomasz Sowinski17-Oct-02 1:51

Please Help! I suddenly get a ton of "missing ')'" and "missing ';'" messages...

17-Oct-02 1:51

Don't worry about 'first chance exceptions.' For more info, see KB article Q105675.

Tomasz Sowinski -- http://www.shooltz.com

*** Purgamentum init, exit purgamentum ***

Redeemer-dk17-Oct-02 1:23

Redeemer-dk

17-Oct-02 1:23

when i compile, i all of the sudden get all these messages:

d:\90GIG\MP3ORGANIZER\FileTransfer\main.cpp(547): error C2143: syntax error : missing ')' before ';'
d:\90GIG\MP3ORGANIZER\FileTransfer\main.cpp(547): error C2059: syntax error : ')'
d:\90GIG\MP3ORGANIZER\FileTransfer\main.cpp(567): error C2143: syntax error : missing ')' before ';'
d:\90GIG\MP3ORGANIZER\FileTransfer\main.cpp(567): error C2660: 'ReadFile' : function does not take 3 parameters
d:\90GIG\MP3ORGANIZER\FileTransfer\main.cpp(567): error C2143: syntax error : missing ';' before ','
d:\90GIG\MP3ORGANIZER\FileTransfer\main.cpp(567): error C2059: syntax error : ')'
d:\90GIG\MP3ORGANIZER\FileTransfer\main.cpp(582): error C2143: syntax error : missing ')' before ';'
d:\90GIG\MP3ORGANIZER\FileTransfer\main.cpp(582): error C2143: syntax error : missing ')' before ';'
d:\90GIG\MP3ORGANIZER\FileTransfer\main.cpp(582): error C2059: syntax error : ')'
d:\90GIG\MP3ORGANIZER\FileTransfer\main.cpp(582): error C2143: syntax error : missing ';' before '&&'
d:\90GIG\MP3ORGANIZER\FileTransfer\main.cpp(582): error C2059: syntax error : ')'
d:\90GIG\MP3ORGANIZER\FileTransfer\main.cpp(614): error C2143: syntax error : missing ')' before ';'
d:\90GIG\MP3ORGANIZER\FileTransfer\main.cpp(614): error C2059: syntax error : ')'
d:\90GIG\MP3ORGANIZER\FileTransfer\main.cpp(632): error C2143: syntax error : missing ')' before ';'
d:\90GIG\MP3ORGANIZER\FileTransfer\main.cpp(632): error C2660: 'recv' : function does not take 3 parameters
d:\90GIG\MP3ORGANIZER\FileTransfer\main.cpp(632): error C2143: syntax error : missing ';' before ','
d:\90GIG\MP3ORGANIZER\FileTransfer\main.cpp(632): error C2059: syntax error : ')'

The first error message directs me to this line:

szFileBuffer = (char *)malloc(SEND_BUFFER_SIZE);

what is wrong with that? there's no ) missing

and the "ReadFile function does not take 3 parameters" directs me here:

ReadFile(hFile, szFileBuffer, SEND_BUFFER_SIZE, &dwBytesRead, NULL);

there isn't threee parameters there, there are five! i don't understand it... and all of the other error messages are wrong too, i'm not missing an ')' or an ';' in any of the places, what could be wrong?

thanks

-Rune Svendsen

Re: Please Help! I suddenly get a ton of "missing ')'" and "missing ';'" messages...

Tomasz Sowinski17-Oct-02 1:26

Re: Please Help! I suddenly get a ton of "missing ')'" and "missing ';'" messages...

17-Oct-02 1:26

Post the #define SEND_BUFFER_SIZE line.

Tomasz Sowinski -- http://www.shooltz.com

*** Purgamentum init, exit purgamentum ***

Anonymous17-Oct-02 2:33

Anonymous

17-Oct-02 2:33

It's

#define SEND_BUFFER_SIZE 8192;

it's the ; that made the errors, thanks to both of you.

Re: Please Help! I suddenly get a ton of "missing ')'" and "missing ';'" messages...

Andreas Saurwein17-Oct-02 1:35

Andreas Saurwein

17-Oct-02 1:35

I suppose the SEND_BUFFER_SIZE looks like this

#define SEND_BUFFER_SIZE   100;

This would introduce errors of this kind.

I keep submitting “VB” as a Priority-1 bug, but apparently no one here knows how to fix it. Nick Hodapp, Semicolon

How can i get the Window Handle...

Renjith Ramachandran17-Oct-02 0:46

17-Oct-02 0:46

Hi friends ,
i 'v a problem.. i want to get the handle of a editbox in applet chat program..how can i get the handle ..?

Program The Future.

Tomasz Sowinski17-Oct-02 0:51

17-Oct-02 0:51

Use Spy++ to get the ID of the edit control. With this, you should be able to grab handle of main window (the edit's parent) with FindWindow and get the edit handle with GetDlgItem.

Tomasz Sowinski -- http://www.shooltz.com

*** Purgamentum init, exit purgamentum ***

Renjith Ramachandran17-Oct-02 0:57

17-Oct-02 0:57

nopes..the spy shows the classname as InternetExplorer_server(Remember its is shown in an explorer..pls look my question...)

I like the dreams of the future than the history of the past.

Tomasz Sowinski17-Oct-02 0:58

17-Oct-02 0:58

So what? Can't you go deeper in windows hierarchy and get the ID of edit box?

Tomasz Sowinski -- http://www.shooltz.com

*** Purgamentum init, exit purgamentum ***

Renjith Ramachandran17-Oct-02 1:00

17-Oct-02 1:00

sorry i hav no idea..can u help..?

I like the dreams of the future than the history of the past.

Tomasz Sowinski17-Oct-02 1:08

17-Oct-02 1:08

Can you expand 'InternetExplorer_Server' item in the Spy++ windows tree?

Tomasz Sowinski -- http://www.shooltz.com

*** Purgamentum init, exit purgamentum ***

Renjith Ramachandran17-Oct-02 1:58

17-Oct-02 1:58

ok..i get..i can now see the handle and classnames...
i want to write some sort of automation(that is i want to write the messages in to the textbox and apply the send button just like the booting software for Yahoo! messenger..(pls dont misunderstand me....!!!!!)by using another program)...

what i want to do.. is there is any samle code available for the same problem ..??

I like the dreams of the future than the history of the past.

Tomasz Sowinski17-Oct-02 2:05

17-Oct-02 2:05

I'd take the following steps:

1) locate main IE window with FindWindow
2) step into windows hierarchy with GetDlgItem (if you know the control ID) or EnumChildWindows (if you only know class name).

Tomasz Sowinski -- http://www.shooltz.com

*** Purgamentum init, exit purgamentum ***

Renjith Ramachandran17-Oct-02 6:05