C / C++ / MFC Discussion Boards

Re: How to reboot computer in VC++?

Alvaro Mendez15-Nov-02 11:42

Alvaro Mendez

15-Nov-02 11:42

It feels like Friday, doesn't it?

Regards,
Alvaro

Well done is better than well said. -- Benjamin Franklin
(I actually prefer medium-well.)

Doc-View: using same document in two programs?

Tom Welch15-Nov-02 8:46

Tom Welch

15-Nov-02 8:46

I have written a program that contains a CDocument derived class. The
user can create a document that is a template. Basically, the document
contains a list of objects like IMAGEBOXES, BORDERS, and CAPTIONS which
the user positioned on the document. This is all working fine. The user
can save and open the document.

Now, part 2. I have another application that needs to be able to open the
first program's document. However, rather than moving the document
objects around, this program needs to let the user specify what images go
in the IMAGEBOXES, what color the BORDERS should be, and what text should
go in the CAPTIONS. Also, this program does not modify the "template"
document. It needs to save a different document.

What is the logical way to implement this?

Should I just include the document class from the first program in the
second?

Can I just use the first program's document in the second program without
the view?

I do need the same basic view functionality in the second program (i.e.
drawing the IMAGEBOXES, BORDERS, and CAPTIONS. Should I use the first
program's view as well?

I don't know what my next step should be. Perhaps I should just write new
document and view classes that contain copy-and-paste pieces from the
original classes (but I want code changes for one to be reflected in the
other with the smallest chance of error).

--
If it starts to make sense, you're in a cult.

Re: Doc-View: using same document in two programs?

Neville Franks15-Nov-02 9:32

Neville Franks

15-Nov-02 9:32

What about creating a base document class with all the common code for each application, and then have derived classes for the different apps. Copy and paste is not the way to go in the OO/C++ world.

Neville Franks, Author of ED for Windows. www.getsoft.com

it does not work what to do?

imran_rafique15-Nov-02 8:45

imran_rafique

15-Nov-02 8:45

if i have to print 'u' then i have to execute this line

SendMessage(hTestWnd, WM_CHAR, (WPARAM) 'u', (LPARAM) 0);

but if i have to print character like
1-:
2-"
3-?
4->
etc
it does not work what to do?
SendMessage(hTestWnd, WM_CHAR, (WPARAM) ':', (LPARAM) 0);

r00d0034@yahoo.com

Re: it does not work what to do?

Christian Graus15-Nov-02 8:59

Christian Graus

15-Nov-02 8:59

What does the MSDN say ? I seem to recall that the higher half of your WPARAM value needs to be set to something other than 0 for non alpha characters, maybe ?

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

During last 10 years, with invention of VB and similar programming environments, every ill-educated moron became able to develop software. - Alex E. - 12-Sept-2002

Re: it does not work what to do?

imran_rafique15-Nov-02 14:12

imran_rafique

15-Nov-02 14:12

yea it should contain contains the scan code plus the virtual-key code.
let suppose i have both the scan code and virtual key code then how to form wparam from it ?
how to get scan code and virtual key code from wparam?

r00d0034@yahoo.com

Re: it does not work what to do?

Christian Graus15-Nov-02 14:28

Christian Graus

15-Nov-02 14:28

It appears Norm has provided a better answer anyhow.

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002

Re: it does not work what to do?

NormDroid15-Nov-02 9:04

NormDroid

15-Nov-02 9:04

SendInput
The SendInput function synthesizes keystrokes, mouse motions, and button clicks.

UINT SendInput(
UINT nInputs, // count of input events
LPINPUT pInputs, // array of input events
int cbSize // size of structure
);

Re: it does not work what to do?

Christian Graus15-Nov-02 10:14

Christian Graus

15-Nov-02 10:14

Cool, Norm. I guess it WAS worth his while to keep asking this question for weeks. I had no idea this API existed....

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002

Re: it does not work what to do?

NormDroid15-Nov-02 22:16

NormDroid

15-Nov-02 22:16

Thats what we're hear for Wink | ;)

File Saving

act_x15-Nov-02 8:43

act_x

15-Nov-02 8:43

i have an MDI application and I am able to save the Document . Now before the Document is saved and the FileDialog invoked i need to save some parameters . If i implement "ONFileSave()" in my view class I no longer get the File Dialog prompt.

I need to be achieving both .
1. Saving my changes
2. Then call the default save mechanism of windows

Also in the FileDialog that appears how do I specify the type of the File (i.e File FIlter). I want my documents to be saved with my custom File extension .

Please help

Re: File Saving

Joaquín M López Muñoz15-Nov-02 9:38

Joaquín M López Muñoz

15-Nov-02 9:38

(Not sure) Try calling your document's OnFileSaveAs message handler inside yours.
If this does not work, Nish has written an article that may help you: CDocument::DoSave revealed[^].

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

that has keyboard focus?

imran_rafique15-Nov-02 8:29

imran_rafique

15-Nov-02 8:29

i am having a window hwnd and i want to get its child window hwnd that has keyboard focus.
how to get it

r00d0034@yahoo.com

Re: that has keyboard focus?

NormDroid15-Nov-02 9:01

NormDroid

15-Nov-02 9:01

GetFocus?

Default browser?

Jon Sagara15-Nov-02 8:19

Jon Sagara

15-Nov-02 8:19

How do I determine the default browser of an NT-based (that is, NT 4/2k/XP/.NET) system? Is there an API call?

Actually, the simplest solution is to call ShellExecute() and just launch the HTML file. Is there a way to get an HWND for a console application?

Barring that, I need to determine the default browser, launch it, and have it open a specified URL.

Jon Sagara

If you think of wheat fields as questionable metaphors, you can think of me as the state of Kansas.
-- Mike Blaszczak

Re: Default browser?

Jon Sagara15-Nov-02 8:34

Jon Sagara

15-Nov-02 8:34

I'm going to create a temporary window (::CreateWindow()), and then use that to call ShellExecute(). Can anyone see any problems with this strategy? Is there a better way to do this?

Jon Sagara

If you think of wheat fields as questionable metaphors, you can think of me as the state of Kansas.
-- Mike Blaszczak

Re: Default browser?

Jon Sagara15-Nov-02 10:47

Jon Sagara

15-Nov-02 10:47

It appears you can just pass in NULL for the HWND.

Jon Sagara

If you think of wheat fields as questionable metaphors, you can think of me as the state of Kansas.
-- Mike Blaszczak

What's wrong with this way of enumerating filters?

Redeemer-dk15-Nov-02 7:35

Redeemer-dk

15-Nov-02 7:35

I've looked at the MSDN example, but the pEnum->Next function returns S_FALSE which means that the number of filters that were requested to be enumerated, wasn't enumerated.

IGraphBuilder *pGraph = NULL;
IEnumFilters *pEnum = NULL;
IBaseFilter *pFilter = NULL;
ULONG cFetched;
HRESULT err;
<br>
CoInitialize(NULL);
err = CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER, IID_IGraphBuilder,(void**)&pGraph);
pGraph->EnumFilters(&pEnum);
<br>
while((err = pEnum->Next(1, &pFilter, &cFetched)) == S_OK)
{
	FILTER_INFO fiFilterInfo;
	char szFilterName[256];
        
	pFilter->QueryFilterInfo(&fiFilterInfo);
	WideCharToMultiByte(CP_ACP, 0, fiFilterInfo.achName, -1, szFilterName, 256, 0, 0);
	SendMessage(GetDlgItem(ghWnd, IDC_FILTERS), LB_INSERTSTRING, -1, (LPARAM)szFilterName);

	fiFilterInfo.pGraph->Release();
	pFilter->Release();
}
<br>
pEnum->Release();
pGraph->Release();
CoUninitialize();
}

All help is apprecaited! Thanks all Smile | :)

-Rune Svendsen

Re: What's wrong with this way of enumerating filters?

Joaquín M López Muñoz15-Nov-02 7:44

Joaquín M López Muñoz

15-Nov-02 7:44

Try calling pEnum->Reset(); before enumerating.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: What's wrong with this way of enumerating filters?

Redeemer-dk15-Nov-02 8:06

Redeemer-dk

15-Nov-02 8:06

Didn't work Frown | :(

thanks anyway man.

-Rune SVendsen

Re: What's wrong with this way of enumerating filters?

Joaquín M López Muñoz15-Nov-02 8:41

Joaquín M López Muñoz

15-Nov-02 8:41

Wait... Seems you're constructing an IGraphBuilder and then enumerating its filters, but an empty IGraphBuilder won't have any. Try using for instance IGraphBuilder::RenderFile on some .avi prior to enumeration.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: What's wrong with this way of enumerating filters?

Redeemer-dk15-Nov-02 13:49

Redeemer-dk

15-Nov-02 13:49

Thankyou i'll try that. But do you know if there's a way to enumerate all the available filters on the current machine?

-Rune Svendsen

Apps Icon

carpediem15-Nov-02 7:21

carpediem

15-Nov-02 7:21

I am trying to do something and the part that sounds the simplest is turning out to the hardest. I am putting a button on a toolbar. What this button will do is allow a user to set the button up to point to an executable. For instace, if the user wants this button to launch solitaire, it goes through the process of having the user find the .exe file. This is simple. The hard part is I am trying to use the icon from the .exe file as the bitmap for my button. And I cannot figure out how to do it. Any ideas? I have looked on this website but haven't found anything, it might be that I don't know where to look exactly...

Re: Apps Icon

Joaquín M López Muñoz15-Nov-02 7:36

Joaquín M López Muñoz

15-Nov-02 7:36

Look for ExtractIcon in the documentation.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Apps Icon

Roger Stewart15-Nov-02 10:09

Roger Stewart

15-Nov-02 10:09

In addition to Joaquín's suggestion, you may also want to look at ExtractAssociatedIcon documentation.

Roger Stewart
"I Owe, I Owe, it's off to work I go..."

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