C / C++ / MFC Discussion Boards

Re: BitMap coloring

Hamid_RT2-Jun-06 2:20

Hamid_RT

2-Jun-06 2:20

include atlimage

whitesky

Crazy with USB Audio device Mapping! Help pls

Dong Nguyen2-Jun-06 0:42

Dong Nguyen

2-Jun-06 0:42

Hello,

Can anybody help me how to distinguish 2 USB audio devices? I have one PCI2USB card (4 ports) and have 4 USB composite (HID + Audio) devices, which can be use which Skype. Anytime I reboot my PC the device name changed, sometimes it is "USB Audio Device", sometimes it is "USB Audio Device 2", sometimes it is "USB Audio Device 3", and sometimes it is "USB Audio Device 4". Anybody know how Windows assign the USB device name? Any naming convention? And finally, how can I get the VendorID/ProductID from the device name? (For example, i want to know if "USB Audio Device 4" is mapped to which vendorID/ProductID?

Thank you in advanced

Best regards,
Dong

Re: Crazy with USB Audio device Mapping! Help pls [modified]

_anil_2-Jun-06 1:39

_anil_

2-Jun-06 1:39

Hi I hope that you might have known the GUID of your device.
Then you can search for the GUID in registry
[HKYE_LOCAL_MACHINE\SYSTEM\currentcontrolset\control\class]
under this key you will find your GUID key
under your GUID key thir will be one
"MatchingDeviceId" key which stores VID and PID.

Regards
Anil

-- modified at 7:39 Friday 2nd June, 2006

Re: Crazy with USB Audio device Mapping! Help pls [modified]

Dong Nguyen2-Jun-06 5:48

Dong Nguyen

2-Jun-06 5:48

Anil,

Thanks for quick reply.

Seem that under HKYE_LOCAL_MACHINE\SYSTEM\currentcontrolset\control\class, all USB audio devices have the same name "USB Audio Device". I could not find "USB Audio Device (2)", "USB Audio Device (3)", and so on. But if I open Sound and Audio Devices Properties Dialog, I could see 4 USB Audio Devices "USB Audio Device", "USB Audio Device (2)", "USB Audio Device (3)", "USB Audio Device (4)". I could recognize my USB device is "USB Audio Device (2)". But next reboot, my device may be named as "USB Audio Device (3). So, my previous setting becomes wrong.

Best regards,
Dong

wchar_t to char

big_denny_2002-Jun-06 0:42

big_denny_200

2-Jun-06 0:42

Hello again Smile | :)

In Unicode build,how to convert a TCHAR array to array of char -s ?

thanks

Re: wchar_t to char

toxcct2-Jun-06 0:56

toxcct

2-Jun-06 0:56

W2C() macro...

TOXCCT >>> GEII power

[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]

Re: wchar_t to char

Maxwell Chen2-Jun-06 1:01

Maxwell Chen

2-Jun-06 1:01

I thought there might be the API UnicodeToAscii, but not for C++ / MFC ...

Maxwell Chen

Re: wchar_t to char

Nibu babu thomas2-Jun-06 3:07

Nibu babu thomas

2-Jun-06 3:07

Maxwell Chen wrote:
I thought there might be the API UnicodeToAscii, but not for C++ / MFC ...

There is are classes CW2A, CA2W.

Nibu thomas
A Developer

Programming tips[^] My site[^]

Re: wchar_t to char

David Crow2-Jun-06 3:24

David Crow

2-Jun-06 3:24

Nibu thomas wrote:
There is are classes CW2A, CA2W.

You forgot to mention that these are ATL macros.

"The largest fire starts but with the smallest spark." - David Crow

Re: wchar_t to char

Amar Sutar2-Jun-06 1:22

Amar Sutar

2-Jun-06 1:22

use WideCharToMultiByte

Amar Smile | :)

Application crashes when build it as MFC in a Static Library

zahid_ash2-Jun-06 0:15

zahid_ash

2-Jun-06 0:15

Hi,

My application is running fine , When Active Configuration is Win32Release and Project->Setting are "Use MFC in a Shared DLL"

but it crashes when Active Sonfiguration is same Win32Release but change the Project->Setting to "Use MFC in a Static Library"

it crashes at following code.

m_pListenSock is an object of CSock class which is inherited from CSocket class.

UINTCServerHandler::OnMsgStart(WPARAM wp, LPARAM lp)
{

m_pListenSock = new CSock();
m_pListenSock->Create (200); // It crashes at Create call
m_pListenSock->Listen ();

return 1;

}

Regard

Re: Application crashes when build it as MFC in a Static Library

David Crow2-Jun-06 3:26

David Crow

2-Jun-06 3:26

So have you stepped into the call to Create() to find the offending statement?

"The largest fire starts but with the smallest spark." - David Crow

how to change interpretation int - hex

tbrake2-Jun-06 0:03

tbrake

2-Jun-06 0:03

Hallo

How can i change the interpretation of a variable.

Example

<br />
int text = 123456;  // editable by user !!<br />
...<br />
// On one position I need to convert to 0x123456<br />
...<br />

THX
Timen

Re: how to change interpretation int - hex

_anil_2-Jun-06 0:11

_anil_

2-Jun-06 0:11

This should work!!!

<code>
  int nText = 12345;
  char  szText[10];
  int nHex =0;
  itoa(12345, szText, 10);
  nHex = strtol( szText, NULL, 16);
</code>

Regards
Anil

Re: how to change interpretation int - hex

Steen Krogsgaard2-Jun-06 0:12

Steen Krogsgaard

2-Jun-06 0:12

Either write your own converter (multiply each digit with powers of 16), or convert to string using sprintf and convert back to hex using sscanf.

Cheers
Steen.

"To claim that computer games influence children is ridiculous. If Pacman had influenced children born in the 80'ies we would see a lot of youngsters running around in dark rooms eating pills while listening to monotonous music"

Re: how to change interpretation int - hex [modified]

Cedric Moonen2-Jun-06 1:19

Cedric Moonen

2-Jun-06 1:19

Steen Krogsgaard wrote:
Either write your own converter (multiply each digit with powers of 16), or convert to string using sprintf and convert back to hex using sscanf.

This makes non-sense. A number is neither in decimal, in hexa, or whatever else; it is just a number. Its representation may change but the number will always be the same. You can say 0x14 or 20 or 0b10100, all these three strings represent the same number.

-- modified at 7:23 Friday 2nd June, 2006
Sorry, I misread the thread Smile | :)

Cédric Moonen
Software developer

Charting control

++: how to change interpretation int - hex

tbrake2-Jun-06 1:56

tbrake

2-Jun-06 1:56

Hallo

1. Well at least it makes sence. cause i have to controll some hardware. To calculate the needed commands the shortes way is to interprete int as Hex bit shift this and the result is the needed command.
Outherwice if you cant see the sence then become a lectural

2. int - char - hex is what i have and this is as fast doing a lot of if else
combinations - well but i need somthing fast - much faster ?!?!

Well the THX

Timen:->

Re: ++: how to change interpretation int - hex

Steen Krogsgaard2-Jun-06 2:28

Steen Krogsgaard

2-Jun-06 2:28

tbrake wrote:
2. int - char - hex is what i have and this is as fast doing a lot of if else
combinations - well but i need somthing fast - much faster ?!?!John Simmons, 05/31/2006

Re: how to change interpretation int - hex

David Crow2-Jun-06 3:29

David Crow

2-Jun-06 3:29

tbrake wrote:
int text = 123456; // editable by user !!
...
// On one position I need to convert to 0x123456

123456 in base-16 is 0x1E240. Use itoa() or sscanf() to do the conversion.

"The largest fire starts but with the smallest spark." - David Crow

Re: how to change interpretation int - hex

Nibu babu thomas4-Jun-06 18:37

Nibu babu thomas

4-Jun-06 18:37

tbrake wrote:
How can i change the interpretation of a variable.

cout<<<code>hex</code><<123233;//displays in hexadecimal format.
cout<<<code>oct</code><<121223;//displays in octal format.
cout<<<code>dec</code><<12323;//displays in decimal format.

Nibu thomas
A Developer

Programming tips[^] My site[^]

windows dialog

iLL eFFect1-Jun-06 23:59

iLL eFFect

1-Jun-06 23:59

hi
i want to include windows open file and open directory widows on the press of the button in my program... can any one please help

Re: windows dialog

Maxwell Chen2-Jun-06 0:08

Maxwell Chen

2-Jun-06 0:08

Use CFileDialog[^].

Maxwell Chen

Re: windows dialog

Steen Krogsgaard2-Jun-06 0:09

Steen Krogsgaard

2-Jun-06 0:09

Damn. Beat me by mere seconds Wink | ;)

Cheers
Steen.

"To claim that computer games influence children is ridiculous. If Pacman had influenced children born in the 80'ies we would see a lot of youngsters running around in dark rooms eating pills while listening to monotonous music"

Re: windows dialog

Maxwell Chen2-Jun-06 0:10

Maxwell Chen

2-Jun-06 0:10

Steen Krogsgaard wrote:
Damn. Beat me by mere seconds

Maxwell Chen

Re: windows dialog

Steen Krogsgaard2-Jun-06 0:08

Steen Krogsgaard

2-Jun-06 0:08

MFC: CFileDialog.
Win32: GetOpenFileName, GetSaveFileName

Cheers
Steen.

"To claim that computer games influence children is ridiculous. If Pacman had influenced children born in the 80'ies we would see a lot of youngsters running around in dark rooms eating pills while listening to monotonous music"

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.