C / C++ / MFC

Re: need helps for writing voice chat program in Visual C++

8-Apr-04 15:41

You could use Microsoft Speech (if both comptuers will be using XP (and NT/2000?), or DirectX DirectPlay (I think, or DirectSound) for the voice part.

I would get the DirectX and/or Speech SDK from microsoft and look around there.

Speech: http://www.microsoft.com/speech/download/sdk51/
DirectX: http://www.microsoft.com/downloads/details.aspx?FamilyId=124552FF-8363-47FD-8F3B-36C226E04C85&displaylang=en

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NgocHung9-Apr-04 3:31

NgocHung

9-Apr-04 3:31

thanks alot.I'll try.

Does Directory Exists

Timothy Grabrian8-Apr-04 14:05

Re: Does Directory Exists

8-Apr-04 14:05

I want to make a program like some of the installers I've seen, if the directory does not exist it asks if you would like to create it. This is my only idea:

<br />
if(CreateDirectory("C:\\Something",0) == TRUE)<br />
{<br />
RemoveDirectory(C:\\Something");<br />
if(MessageBox(0,"Directory exists, would you like me to create it?","?",0) == IDYES)<br />
CreateDirectory(C:\\Something",0);<br />
}<br />
<br />
//or<br />
<br />
if(CreateDirectory("C:\\Something",0) == TRUE)<br />
{<br />
if(MessageBox(0,"Directory exists, would you like me to create it?","?",0) == IDNO)<br />
RemoveDirectory(C:\\Something");<br />
}<br />

Either way they don't seem to be very good, is there another way?

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gUrM33T8-Apr-04 14:49

8-Apr-04 14:49

KingKruncher wrote:
is there another way

Yes there is (actually more than one). One of them is to use GetFileAttributes to check for the existence of a file or directory. Take a look:

C++

// directory does not exists?
if (GetFileAttributes(TEXT("c:\\some_directory")) == (DWORD)-1)
{
  if (GetLastError() == ERROR_FILE_NOT_FOUND)
  {
    if (MessageBox(NULL, TEXT("Directory c:\\some_directory does not exists. Would you like to create it?"), TEXT("Please Confirm"), 0) == IDYES)
    {
      // TODO: create a directory
    }
  }
}

Hope this helps.

Gurmeet S. Kochar

If you believe in God, it's because of the Devil

My CodeProject Articles: HTML Reader C++ Class Library, Numeric Edit Control

Re: Thanks

Timothy Grabrian8-Apr-04 15:12

8-Apr-04 15:12

Thank you alot Gurmeet S. Kochar. That still doesn't seem right, but it's better than what I had. Thanks again.

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Re: Thanks

8-Apr-04 15:38

KingKruncher wrote:
That still doesn't seem right

Why do you think so?

Gurmeet S. Kochar

If you believe in God, it's because of the Devil

My CodeProject Articles: HTML Reader C++ Class Library, Numeric Edit Control

Re: Thanks

Timothy Grabrian8-Apr-04 15:52

WM_SYSCOMMAND & SC_MOUSEMENU

8-Apr-04 15:52

Well, I was just thinking there would be a function called "DoesDirectoryOrFileExist" or something like that, but I just couldn't find any thing.

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Anonymous8-Apr-04 13:38

Anonymous

8-Apr-04 13:38

I am trying to open a popup menu from a menubar without progmatically, without the mouse necesarily being near the menu and without SendInput.

SendMessage( targetWindow, WM_SYSCOMMAND, SC_MOUSEMENU, lParam );

The documentation for SC_MOUSEMENU says "Retrieves the window menu as a
result of a mouse click.". Now I know the parameters I send are correct, but it does nothing. Can someone explain why it doesnt work? Or possibly explain how I could get it to work?

lParam = MAKELPARAM( screenIntersect.x, screenIntersect.y );

I have matched my screenIntersect to the values I got from Spy++ just to ensure they were correct compared to normal ( not gernerated by me )
messages.

I know I can send ALT+downarrow key command to open the first menu.. only problem with that is if the menu is already in tht "ALT" state sending another ALT will turn that state off. Also its not really the same since the ALT state will wait for a hotkey, not what normall happens when you open a menu with a mouse click.

Thanks,

How to override CEdit::Paste

Hashim Saleem8-Apr-04 13:35

Hashim Saleem

8-Apr-04 13:35

I need to develope a text editor that can also display bmp images. I need to perform clipboard functions on bitmaps as well as text.

I m inheriting a new class from CEdit and having a CBitmap member variable. I want to override the CEdit paste (infact clipboard methods) method so taht I can display bitmaps alongwith the text since CEdit allows only CF_TEXT format.

I cant find any way at the moment to do this.

A lot of thanks for the suggestions.

Re: How to override CEdit::Paste

gUrM33T8-Apr-04 14:53

Re: How to override CEdit::Paste

8-Apr-04 14:53

Use RichEdit control instead.

Gurmeet S. Kochar

If you believe in God, it's because of the Devil

My CodeProject Articles: HTML Reader C++ Class Library, Numeric Edit Control

Hashim Saleem8-Apr-04 14:59

Hashim Saleem

8-Apr-04 14:59

OK. I try to see whether CRichEdit provides this functionality and how to use it. but isnt there anyway to override CEdit::paste??

Re: How to override CEdit::Paste

gUrM33T8-Apr-04 15:47

Retrieving MySQL blob to GDI+ object without file access

8-Apr-04 15:47

hashimsaleem wrote:
but isnt there anyway to override CEdit::paste

Yes there is, but edit controls can handle text only.

Gurmeet S. Kochar

If you believe in God, it's because of the Devil

My CodeProject Articles: HTML Reader C++ Class Library, Numeric Edit Control

Rectangle call fails

Blake Miller8-Apr-04 11:56

Blake Miller

8-Apr-04 11:56

I am testing on Windows XP with Fast User Switching.
Our drawng code goes through our own DrawRect function which is a wrapper for Rectangle().
Our function checks the return value from Rectangle, which is a bool. Microsoft says to check GetLastError when Rectangle fails. I did and it rturns '5' - access denied WTF | :WTF:

after switching away from the current user, to another user, and then coming back to the original user.
Anyone else ever seen this error come back for the Rectangle call?
I have stepped through the program, and if I let the drawing continue everything --appears-- to be fine Unsure | :~

lbe8-Apr-04 11:29

lbe

8-Apr-04 11:29

Hello,

I'd like to retrieve blob fields (which contains jpeg file) from MySQL queries without file access.

My current solution is w/ file access : fwrite(row[1],1,lengths[1],pOutFile); (like examples from MySQL.org) + Bitmap image(path to saved file) and I'm not satisfied ...

TIA

lbe

Re: Retrieving MySQL blob to GDI+ object without file access

PJ Arends8-Apr-04 15:39

PJ Arends

8-Apr-04 15:39

If I remember correctly this can be accomplished using streams. Allocate global memory of the correct size using GlobalAlloc(), read your blob data into that memory, use CreateStreamOnHGlobal() to make an IStream object containing your data, then use Bitmap::FromStream() to read the data into a bitmap object.

and no, I do not have code that does this Poke tongue | ;-P

Sonork 100.11743 Chicken Little

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

Within you lies the power for good - Use it!

Re: Retrieving MySQL blob to GDI+ object without file access

lbe20-Apr-04 10:06

lbe

20-Apr-04 10:06

Assume row[1] comes from "mysql_fetch_row" and is a BLOB. The code below works for me :

LPVOID pvData = NULL;
HGLOBAL hGlobal = GlobalAlloc(GMEM_MOVEABLE, lengths[1]);

pvData = GlobalLock(hGlobal);
CopyMemory(pvData, row[1], lengths[1]);
GlobalUnlock(hGlobal);

IStream * pStream = NULL;
HRESULT hr = CreateStreamOnHGlobal(hGlobal, TRUE, &pStream);

Bitmap * image;
image = Bitmap::FromStream(pStream);
pStream->Release();

detect enter key in single line edit box

Anonymous8-Apr-04 11:25

Anonymous

8-Apr-04 11:25

sorry for repost

i have an edit box and a button add on a tab (i have 3 tabs on a dialog..each tab is a seperate dialog using property page)...im trying to have it where if a user press enter in the edit box it will execute the button add (call on the add function which the button is mapped to)..how can i do this? this is a single line edit box

i've tried onchar event for that dialog and it's not detecting when i type in that edit box...

i've also tried default push button property for that button and it's also not working

any suggestions? thanks

Anonymous8-Apr-04 13:23

Anonymous

8-Apr-04 13:23

You need to process WM_GETDLGCODE message and return DLGC_WANTALLKEYS + whatever edit control returns (don't remember if DLGC_WANTCHARS would be enough), in order to receive this keyboard message message. Or you can make it a multiline edit contrl (ES_MULTILINE) with ES_WANTRETURN style.

Edward

gUrM33T8-Apr-04 14:59

8-Apr-04 14:59

Override PreTranslateMessage and look for WM_KEYDOWN message to handle enter (or any other) key.

Gurmeet S. Kochar

If you believe in God, it's because of the Devil

My CodeProject Articles: HTML Reader C++ Class Library, Numeric Edit Control

Timothy Grabrian8-Apr-04 16:02

8-Apr-04 16:02

handle this in your WM_COMMAND message:

case IDC_EDIT2:
	if(HIWORD(wParam) == EN_CHANGE)
	SendMessage(hDlg,DM_SETDEFID,(WPARAM)IDOK,0);
	//Make IDOK the ID of the Add button
break;

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