C / C++ / MFC

30-Jan-08 2:06

I am currently generating a BMP file by capturing screenshot of the current active window. Any ideas how to convert it to JPG format in order to make its size small. We are Ok with some loss occuring in image quality after the conversion.

Thanks
Cagespear

CPallini30-Jan-08 2:13

30-Jan-08 2:13

You may use GDI+ Image class to save it as JPEG file [^].
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

[my articles]

Mark Salsbery30-Jan-08 6:29

Mark Salsbery

30-Jan-08 6:29

#include <atlimage.h>
...
CImage CapturedBitmap;
CapturedBitmap.Create(width, height, 24);

HDC BitmapDC = CapturedBitmap.GetDC();

...blt the window/screen pixels to BitmapDC ...

CapturedBitmap.ReleaseDC();

CapturedBitmap.Save(_T("c:\\myjpeg.jpg"), ImageFormatJPEG);

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

cagespear30-Jan-08 16:06

30-Jan-08 16:06

This looks really neat Mark! Thanks a ton for the reply!

Cheers!
Cagespear

its intersting ...i wannt ue suggestion also PLZ!!!

Hamid_RT30-Jan-08 18:30

Hamid_RT

30-Jan-08 18:30

If you handle of it you can use of
CImage m_Image;
m_Image.Attach(hbitmap);
m_Image.Save("c:\\1.jpg");

rowdy_vc++30-Jan-08 2:06

rowdy_vc++

30-Jan-08 2:06

Hi friends ....

i have one doubt with check the mobile..suppose i can check the one mobile or phone's RSSI (Received Signal Strength Indication).Where i can get that it

Mobile Switching Center(MSC) or Signal towers or something else ....

plz tell me ur suggestion also!!!

Thanks n Advance.

raju.k

Re: its intersting ...i wannt ue suggestion also PLZ!!!

CPallini30-Jan-08 2:42

Re: its intersting ...i wannt ue suggestion also PLZ!!!

30-Jan-08 2:42

Oh yes, it's very interesting.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

[my articles]

vijay_aroli30-Jan-08 3:21

vijay_aroli

30-Jan-08 3:21

CPallini wrote:
Oh yes, it's very interesting.

Regards,
Vijay.

Re: its intersting ...i wannt ue suggestion also PLZ!!!

vijay_aroli30-Jan-08 3:19

vijay_aroli

30-Jan-08 3:19

Regards,
Vijay.

Re: its intersting ...i wannt ue suggestion also PLZ!!!

Iain Clarke, Warrior Programmer30-Jan-08 4:21

Iain Clarke, Warrior Programmer

30-Jan-08 4:21

I'm sure I'm going to regret answering you, but you might get help from the Mobile forum, rather than here.

I would imagine there is an API in Windows Mobile to get that information - but it could be quite hard. After all, which signal strength? GPRS, CDMA, GSM, GPS, Wifi, Bluetooth? And that's just the ones I can think of.

Iain.

Queries on CryptAcquireContext()

Member 386968230-Jan-08 1:15

Member 3869682

30-Jan-08 1:15

Hi all,
i am working on password encryption in my VC++ application.When i try to create a key container, the function CryptAcquireContext() fails with NTE_BAD_KEYSET( 0x80090016L ). and the subsequent call fails with NTE_EXISTS( 0x8009000FL ),(i could not reproduce it consistently). Is this occurs because of the key container access rights.? i could not figure out which are all the users are not accessable to a particular container..!(i m using default key container as i kept second parameter of the CryptAcquireContext() to NULL). i understand that this access rights may related to the user who creates the container, then too i m in confusion coz i could not reproduce the problem if i experiment this as explined in msdn. i think my understanding about the access on key container is not exact. can some one help me out regarding this issue..!! here the code snippet where i got the error messages.

if (!CryptAcquireContext(&hProv, NULL, MS_DEF_PROV, PROV_RSA_FULL, 0))
{
if (!CryptAcquireContext(&hProv, NULL, MS_DEF_PROV, PROV_RSA_FULL, CRYPT_NEWKEYSET))
{

return FALSE;
}
}

Thanks in Advance
kathir

Re: Queries on CryptAcquireContext()

cagespear30-Jan-08 2:10

Re: Queries on CryptAcquireContext()

30-Jan-08 2:10

Try using a named container. I was facing a similar issue as yours and this did fix my issue.

if (!CryptAcquireContext(&hProv, "Container", MS_DEF_PROV, PROV_RSA_FULL, 0))
{
if (!CryptAcquireContext(&hProv, "Container", MS_DEF_PROV, PROV_RSA_FULL, CRYPT_NEWKEYSET))
{

return FALSE;
}
}

Member 386968230-Jan-08 2:19

Member 3869682

30-Jan-08 2:19

yes cagespear, its working with a unique container name..!! but i want to use default container...! any guess about why its not working with NULL value..?i jus want to know the reason why its not working..?
regards
kathir

Re: Queries on CryptAcquireContext()

cagespear30-Jan-08 4:16

30-Jan-08 4:16

The apps should not use the default key container, as this might be incompatible with other application using the same key container name. It's best to use a key container name which is unique to your application.

why aaa exceeds 150?

gentleguy30-Jan-08 1:00

gentleguy

30-Jan-08 1:00

dear all

why the aaa exceeded 150 after i compiled, any problem?

int aaa = 0;
int aa = 99;
for (int i=0;i<10;i++)
{
double minValue = fitness[9];
if (fitness[i] <= minValue)
{
minValue = fitness[i];
for (int j=0;j<150;j++)
{

aa = h[i][j] - iris1[j];
if (aa == 0)
aaa = aaa + 1;
}
}

}

but total is 150...thanks

Li Zhiyuan

5/10/2006

Cedric Moonen30-Jan-08 1:09

Cedric Moonen

30-Jan-08 1:09

Never heard about a debugger, do you ?

Cédric Moonen
Software developer

Charting control [v1.2]

Cranky30-Jan-08 1:10

Cranky

30-Jan-08 1:10

Most likely your CPU is faulty. There are some CPUs from both Intel and AMD which are known to be counting wrong.

Cedric Moonen30-Jan-08 1:21

Cedric Moonen

30-Jan-08 1:21

In a bad mood today ? Big Grin | :-D

Cédric Moonen
Software developer

Charting control [v1.2]

CPallini30-Jan-08 2:06

30-Jan-08 2:06

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

[my articles]

vijay_aroli30-Jan-08 1:18

vijay_aroli

30-Jan-08 1:18

li zhiyuan wrote:
any problem?

probably because its outside the scope of the 'for' loop.

Regards,
Vijay.

modified on Wednesday, January 30, 2008 7:24:56 AM

CPallini30-Jan-08 2:09

30-Jan-08 2:09

Probably the opposite.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

[my articles]

gentleguy30-Jan-08 2:16

gentleguy

30-Jan-08 2:16

i debugged step by step..it is ok...

Li Zhiyuan

5/10/2006

CPallini30-Jan-08 2:24

30-Jan-08 2:24

What is OK?
What are you expecting the code should do (details please)?
What is the code actually doing?
Why do you think aaa should not exceed 150?

Let us know.

Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

[my articles]