OLE Drag and Drop not starting - C / C++ / MFC Discussion Boards

Re: help

David Crow22-Aug-07 2:56

David Crow

22-Aug-07 2:56

SnaKeBeD wrote:
if(fileDialog.DoModal==IDOK)

How did you even get this to compile correctly, or is it not a true copy/paste?

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: help

Russell^'22-Aug-07 3:04

Russell^'

22-Aug-07 3:04

SnaKeBeD wrote:
CFileDialog fileDialog(true,null,null,OFN_MULTISELECT | OFN_NODEREFERNCELINK|OFN_EXPLORER ,"Excel File(*.xls)|*.xls|AllTypes(*.*)|*.*");

POSITION file=fileDialog.GetStartPosition();

mmmm...is it too soon to call GetStartPosition()? Unsure | :~

Russell

Re: help

Russell^'22-Aug-07 3:07

Russell^'

22-Aug-07 3:07

SnaKeBeD wrote:
if(fileDialog.DoModal==IDOK)

what about

if(fileDialog.DoModal()==IDOK)

Russell

Re: help

Russell^'22-Aug-07 1:47

Russell^'

22-Aug-07 1:47

I use this code:

CFileDialog dlgFile(TRUE, "txt", NULL, OFN_HIDEREADONLY|OFN_FILEMUSTEXIST|OFN_ALLOWMULTISELECT, YOURFILETYPEFILTER, NULL, 0);<br />
CString ResourceString="Select file(s)";<br />
TCHAR szFile[IMPORT_MAX_PATH_LENGTH];<br />
_tcscpy(szFile, ResourceString);<br />
dlgFile.m_ofn.lpstrFile=szFile;<br />
dlgFile.m_ofn.nMaxFile=IMPORT_MAX_PATH_LENGTH;<br />
if(dlgFile.DoModal()!=IDOK) return FALSE;

Russell

Re: help

toxcct22-Aug-07 3:11

toxcct

22-Aug-07 3:11

_Russell_ wrote:
CString ResourceString="Select file(s)";
TCHAR szFile[IMPORT_MAX_PATH_LENGTH];
_tcscpy(szFile, ResourceString);

you could have factorized this anyway :

TCHAR szFile[IMPORT_MAX_PATH_LENGTH] = _T("Select file(s)");

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Re: help

Russell^'22-Aug-07 3:22

Russell^'

22-Aug-07 3:22

my code was more complex: Poke tongue | ;-P

CString ResourceString=""; ResourceString.LoadString(IDS_STR_SELECTFILENAME);

...thanks anyway for the right lesson Wink | ;)

Russell

Re: help

PJ Arends22-Aug-07 6:28

PJ Arends

22-Aug-07 6:28

http://www.codeproject.com/dialog/pja_multiselect.asp[^]

You may be right
I may be crazy
-- Billy Joel --

Within you lies the power for good - Use it!

OLE Drag and Drop not starting

Roger Allen22-Aug-07 0:01

Roger Allen

22-Aug-07 0:01

I am trying to get OLE drag and drop to work in one of my applications. According to all the documentation I can find the minimum I need to be able to drag an object from my app into a OLE drag target would be:

<br />
    HGLOBAL hData = GlobalAlloc(GMEM_MOVEABLE,20);<br />
    if (hData != NULL)<br />
    {<br />
        char *pChar = (char *)GlobalLock(hData);<br />
        strcpy(pChar,"This is a test");<br />
        GlobalUnlock(hData);<br />
        COleDataSource source;<br />
        <br />
        source.CacheGlobalData(<br />
                CF_TEXT,<br />
                hData);<br />
        DROPEFFECT de = source.DoDragDrop(DROPEFFECT_COPY | DROPEFFECT_MOVE);<br />
    }<br />

Which should allow me to drag text from my window to an ole enabled drop target. The above code is called in my OnLButtonDown handler. Everything seems to be ok until the COleDataSource::DoDragDrop function calls ::DoDragDrop() (OleDrop1.cpp line 181), which should return when the operation completes. But it returns immediately with DROPEFFECT_NONE which should not be the case. The way COleDataSource::DoDragDrop is written wont let me examine the return code for the function so I can see why its failing.

Has anyone got any ideas as to what the cause of the problem could be? My heads getting sore banging against a wall here Frown | :(

If you vote me down, my score will only get lower

Re: OLE Drag and Drop not starting

Roger Allen22-Aug-07 0:24

Roger Allen

22-Aug-07 0:24

No worries, finally tracked down the problem.

Its seems you need to call:

<br />
    AfxOleInit();<br />

When your appp starts up to enable OLE. Not once in the standard docs for this is this mentioned anywhere. Grrrrr!

If you vote me down, my score will only get lower

DBException [modified]

sanjutvm21-Aug-07 23:55

sanjutvm

21-Aug-07 23:55

Hi,

I'm working in VC++6 and using ODBC connection.

I'm debugging my code from my system. The exe and related dlls are in a different system. Suppose in the code i've 2 places where db functions are called(which in turn call Requery()/ Open()).
Just before i reach the first db function call, i remove the network connection and restore it (by unplugging and plugging the n/w cable).
When it reaches the 1st db call, it is giving me unhandled exception instead of going to DBException catch block.
In the override Open()function of CRecordset, I tried to re-establish the dbconnection if it is not there. Now if i remove n/w and restore it, it moves smoothly in the first call to db function. But in the 2nd call, i'm getting unhandled exception, and the database pointer itself is NULL now.
Why is this happening?

If the source code, exe and the dlls are in the same system, it goes to the DBException catch block without any change to restablish the db connection.

Thanks,
Sanju

-- modified at 6:42 Wednesday 22nd August, 2007

Aggregating the ActiveX control

ss43121-Aug-07 23:37

ss431

21-Aug-07 23:37

Hi all,
I've an ActiveX control with me and i want to aggregate this ActiveX control from a component.How can i do this? Anyone please help me

Thanks in advance

ss

How to draw Arc in eVC++ (WinCE)

himuskanhere21-Aug-07 23:31

himuskanhere

21-Aug-07 23:31

hey Friends..
CDC::Arc(...) is not supported in eVC++ (WinCE).
Please give me some hint to draw Arc and Pie without using MFC methods
thanks ... Cool | :cool:

Re: How to draw Arc in eVC++ (WinCE)

ThatsAlok21-Aug-07 23:52

ThatsAlok

21-Aug-07 23:52

look at Win32 Api Arc and ArcTo

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

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Re: How to draw Arc in eVC++ (WinCE)

himuskanhere22-Aug-07 0:21

himuskanhere

22-Aug-07 0:21

Win32 Api Arc and ArcTo ...etc are not supported in eVC++(WinCE)

Re: How to draw Arc in eVC++ (WinCE)

himuskanhere22-Aug-07 1:17

himuskanhere

22-Aug-07 1:17

Win32 Api arenot supported in WinCE!!

Re: How to draw Arc in eVC++ (WinCE)

Nelek22-Aug-07 1:26

Nelek

22-Aug-07 1:26

Mmmm,

Have you looked into the API how does the function works? Maybe is it possible to code it separatelly.

I guess it is possible to program it giving the two points, a radio and a bool.

With the two points you limit the circle being drawn,

with the radio you take how flat or round should it be, a line is an arc of a circle with infinite radio.

with the bool you say: the shortest way between the points or the other side of the circle?

The equation of a circle is: x² + y² = r²

I hope it helps.

Greetings.

--------
M.D.V.

If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?

Re: How to draw Arc in eVC++ (WinCE)

Iain Clarke, Warrior Programmer22-Aug-07 3:20

Iain Clarke, Warrior Programmer

22-Aug-07 3:20

I answered the same question a few days ago. Different poster, same class?

And on examination, you're the same person who asked it!

Forget MFC - the CDC functions are only thin wrappers around the original Win32 GDI function calls.

Does ::Ellipse not work? Could you not find the documentation for ::SelectClipRgn, or ::CreatePolygonRgn? Or do they not work in WinCE?

If you don't want windows to do the heavy lifting for you, then you're going to have to roll your sleeves up and learn a bit more about sin & cos...

Iain.

Socket Programming.

GauranG Shah21-Aug-07 23:00

GauranG Shah

21-Aug-07 23:00

Hello friends,
In my one of the project i require to send the data to the function resides on internet. Can i use the Socket on Port 80 ( which is reserved for HTTP)
or is there another way

Re: Socket Programming.

ThatsAlok21-Aug-07 23:10

ThatsAlok

21-Aug-07 23:10

Gaurang Shah 033 wrote:
In my one of the project i require to send the data to the function resides on internet. Can i use the Socket on Port 80 ( which is reserved for HTTP)
or is there another way

is HTTP* or Internet* api of any use

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief

Executing a script on a server asynchronously

Sean OConnor21-Aug-07 22:58

Sean OConnor

21-Aug-07 22:58

I'm using WinInet to call a Perl script on a webserver but at the moment I do it synchronously. Sometimes this gives real problems as it can take a few seconds for the InternetOpenUrl command to execute. I really want to do this asynchronously but I'm having a lot of trouble understanding how to do this. I don't need to read anything back from the webserver so I'm hoping there's a simple solution to this.

Can anyone help?

Sean O'Connor
http://www.windowsgames.co.uk

Re: Executing a script on a server asynchronously [modified]

Sean OConnor22-Aug-07 0:33

Sean OConnor

22-Aug-07 0:33

I think I've got it to work using this code but I'd be very grateful if anybody who knows their WinInet could take a look and let me know if I'm doing anything wrong (eg not freeing up things when I should be):

HINTERNET	hInternetSession;   
HINTERNET	hURL;

typedef struct
{
    HWND        hWindow;     // window handle
    int         nStatusList; // ID of the list box control to hold the callbacks
    HINTERNET   hResource;   // HINTERNET handle created by InternetOpenUrl
    char        szMemo[512]; // string to store status memo
} REQUEST_CONTEXT;

REQUEST_CONTEXT	request_context;

void __stdcall InternetCallbackFunction(HINTERNET hInternet,
                        DWORD dwContext,
                        DWORD dwInternetStatus,
                        LPVOID lpvStatusInformation,
                        DWORD dwStatusInformationLength)
{
	REQUEST_CONTEXT *cpContext;
	cpContext= (REQUEST_CONTEXT*)dwContext;

	switch (dwInternetStatus)
	{
		case INTERNET_STATUS_HANDLE_CREATED:
			hURL = hInternet;
			break;

		case INTERNET_STATUS_REQUEST_COMPLETE:
			InternetCloseHandle(hURL);

			InternetSetStatusCallback(hInternetSession, NULL);

			InternetCloseHandle(hInternetSession);
			break;
	}
}

BOOL SendURL(char* szURL)
{
	hInternetSession = InternetOpen("Microsoft Internet Explorer", INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, INTERNET_FLAG_ASYNC);
	
	if (hInternetSession != NULL)
	{
		InternetSetStatusCallback(hInternetSession, (INTERNET_STATUS_CALLBACK)InternetCallbackFunction);

		hURL = InternetOpenUrl(hInternetSession, szURL, NULL, 0, INTERNET_FLAG_RELOAD | INTERNET_FLAG_PRAGMA_NOCACHE | INTERNET_FLAG_NO_CACHE_WRITE, (unsigned long)(&request_context));
	
		return TRUE;
	}
			
	return FALSE;
}

-- modified at 7:01 Wednesday 22nd August, 2007

Changing IE options from VC

pc_dev21-Aug-07 22:55

pc_dev

21-Aug-07 22:55

How can the "work offline" option in internet explorer be changed to "work online" using MFC.

Thanks in advance Rose | [Rose]

Re: Changing IE options from VC

ThatsAlok21-Aug-07 23:09

ThatsAlok

21-Aug-07 23:09

InternetSetOption

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief

Re: Changing IE options from VC

David Crow22-Aug-07 2:32

David Crow

22-Aug-07 2:32

Has INTERNET_OPTION_OFFLINE_MODE been implemented?

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: Changing IE options from VC

ThatsAlok22-Aug-07 21:27

ThatsAlok

22-Aug-07 21:27

DavidCrow wrote:
Has INTERNET_OPTION_OFFLINE_MODE been implemented?

naah... i am just looking for api InternetSetOffline.. but seems i missed the decalaration!

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief

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