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I write a program to dectect a new arrival USB-FLASH DISK [U-DISK]! if this arrival U-DISK satify my condition ,I do nothing and let it work defaultly; otherwise, I call a function to disable this arrival U-DISK.
my solution is :
1. write a function to disable specified U-DISK;
2. write a function to judge wheather the arriaval U-DISK is I wantted;
3. realize WM_DEVICECHANGE event and in this event to call my function;
the functions above may work correctly; but when I add WM_DEVICECHANGE event, these function work unuseful.I just want to know:Can I disable a specified U-DISK in WM_DEVICECHANGE?
there cannot upload sample codes.if someone may solve this problem or have interest with it ,please contact me and I will give you my sample codes.
thanks a lot .
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Hi.
I have created MDI derived from CFormview. When I File -> Open, a child window with this (first) view will open. This part is done. From there, user clicked on the modified menu say, View -> Graph. Then another child window will open with a different (second) view. This second view needs to be in CFormview as I will have control in it.
Any suggestion on how to implement this idea?
Thanks.
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Do you want to make a CFormView ?
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You can insert CFormview to your project after insert you have a dialog with it.Does it your answer or no?
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Hey folks,
What's your favorite Math-Library (besides Math.h 
I need a really good math-library which has FFT and SVD and a bunge of other stuff...
*I tried JAMA, which is not too bad, but has too few functions for me
*Matpack (surely a great Library but I only get errors when trying to compile)
(www.matpack.de - maybe someone can help me get this running)
*I even tried copying (well, more like typing from) "Numerical recipes in C" and even those ended in an endless loop when trying to do a svd.
any suggestions?
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Have you tried the C libs from Matlab? A friend of mine is doing programming for matlab in C, so there should be something to include. But I can not tell you what, because I don't know it. I will ask him but, at least, you can try looking for it.
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?
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I want to write a tool in VC++ that processes files and reports messages to the error and output windows within VS2005. I want to create my own tabs within the output window and make modifications to source files within the current project.
Could someone give me a pointer as to where to start reading up on the subject. Usual problem, I don't know what the subject name is so I can not find it in MSDN.
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Anorexic Tribble wrote: I don't know what the subject name
Addin for Visual studio
nave
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Is there an API for burning files to DVD in a similar way as IMAPI?
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Hi all:
Visual Studio 2005 gave me an error warning: "Too many initializers" when I tried to compile my codes:
ifstream in(argv[1], ios_base::binary);
I really do not know why?
Can any one help?
Thank you
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Do you have
#include <fstream>
using namespace std;
somewhere before that line of code?
If so, what is argv?
Mark
"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder
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Hi Mark:
Thank you. I forgot about #include<fstream>
Thank you again
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Hi,
When I use
AVISaveOptions(*phFrameWnd, 0, 1, &m_pStream, m_aopts);
to bring up a dialog to choose Avi compressor options, got the following debug error:
First-chance exception in AviMaker.exe (DIVX.DLL): 0xC0000005: Access Violation
Do you know why? DivX codec 6.6 is installed.
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If you continue after the first-chance exception does it run normally (meaning the exception was
caught and handled in the dll)??
If not...
What is m_aopts?
m_pStream points to a valid IAVIStream interface?
Mark
"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder
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Yes. The exception was possibly handled in the dll. I got the same violation in the AVIStreamSetFormat() but it returned AVIERR_OK. The real problem is the AVIStreamWrite(), which returned AVIERR_BADFORMAT.
The code is pasted. This problem happens for Divx 6.6.1 Codec. it works fine for others like Huffyuv. Any thought?
Thanks a lot,
--------Code sample--------
int CVideoWriter::SaveAviFrame(HWND *phFrameWnd, HBITMAP *phBitmap)
{
AVISTREAMINFO sAviStreamInfo;
HRESULT hResult;
DIBSECTION sDibSection;
int iSizeDIBSection;
AVICOMPRESSOPTIONS m_opts;
AVICOMPRESSOPTIONS *m_aopts[1];
iSizeDIBSection = GetObject((*phBitmap),sizeof(sDibSection),&sDibSection);
if (iSizeDIBSection != sizeof(DIBSECTION))
return OPERATION_ERROR;
if (m_pStream == NULL)
{
ZeroMemory(&sAviStreamInfo, sizeof(AVISTREAMINFO));
sAviStreamInfo.fccType = streamtypeVIDEO;
sAviStreamInfo.fccHandler = 0;
sAviStreamInfo.dwScale = m_dwPeriod;
sAviStreamInfo.dwRate = 1000;
sAviStreamInfo.dwQuality = -1;
sAviStreamInfo.dwSuggestedBufferSize = sDibSection.dsBmih.biSizeImage;
SetRect(&sAviStreamInfo.rcFrame, 0, 0, sDibSection.dsBmih.biWidth,
sDibSection.dsBmih.biHeight);
hResult = AVIFileCreateStream(m_pAviFile, &m_pStream, &sAviStreamInfo);
if (hResult != AVIERR_OK)
return OPERATION_ERROR;
}
if (!(*m_pbIsCompressionOptionDone))
{
ZeroMemory(&m_opts,sizeof(AVICOMPRESSOPTIONS));
m_aopts[0] = &m_opts;
BOOL bPressOk = (BOOL) AVISaveOptions(*phFrameWnd, 0, 1, &m_pStream,
(LPAVICOMPRESSOPTIONS *) m_aopts);
if (!bPressOk)
{
AVISaveOptionsFree(1,m_aopts);
(*m_pbIsCompressionOptionDone) = TRUE;
return OPERATION_CANCEL;
}
}
if (m_pCompressedStream == NULL)
{
m_opts.fccType = streamtypeVIDEO;
m_opts.dwFlags = AVICOMPRESSF_VALID;
hResult = AVIMakeCompressedStream(&m_pCompressedStream, m_pStream,
&m_opts, NULL);
if (hResult != AVIERR_OK)
return OPERATION_ERROR;
hResult = AVIStreamSetFormat(m_pCompressedStream, 0, &sDibSection.dsBmih,
sDibSection.dsBmih.biSize + sDibSection.dsBmih.biClrUsed*sizeof(RGBQUAD));
if (hResult != AVIERR_OK)
return OPERATION_ERROR;
}
if (!(*m_pbIsCompressionOptionDone))
{
AVISaveOptionsFree(1,m_aopts);
(*m_pbIsCompressionOptionDone) = TRUE;
}
hResult = AVIStreamWrite(m_pCompressedStream, m_iFrameNumber, 1,
sDibSection.dsBm.bmBits, sDibSection.dsBmih.biSizeImage, 0, NULL, NULL);
if (hResult != AVIERR_OK)
return OPERATION_ERROR;
return NO_ERROR;
}
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I'm not seeing anything wrong in your code.
I am suspicious of this line before the AVIMakeCompressedStream() call:
m_opts.dwFlags = AVICOMPRESSF_VALID;
What is the value of m_opts.dwFlags BEFORE this line executes? It seems to me you may be erasing
important flags there.
Also, with the way you are getting a BITMAPINFOHADER, this call isn't necessarily good:
hResult = AVIStreamSetFormat(m_pCompressedStream, 0, &sDibSection.dsBmih,
sDibSection.dsBmih.biSize + sDibSection.dsBmih.biClrUsed*sizeof(RGBQUAD));
This should be
hResult = AVIStreamSetFormat(m_pCompressedStream, 0, &sDibSection.dsBmih, sizeof(BITMAPINFOHEADER));
since there won't be any color table in a DIBSECTION structure unless
sDibSection.dsBmih.biCompression is BI_BITFIELDS.
Mark
"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder
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Thanks for the nice observation. I did the 2 changes to erase possible defects. Somehow, the problem seems not gone yet. I tried to decrease the frame rate to
sAviStreamInfo.dwScale = 1;
sAviStreamInfo.dwRate = 30;
it happened to work. But the dwRate can not be larger than 30. and the image size must be less than 580x580. Otherwise, problem holds. It sounds really strange since no rate or size limitation for DivX Codec is known about.
If more comments, I like to know.
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What about 720x576 25 fps ?
I'm not sure where to find an accurate description of valid formats for that codec
Mark
"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder
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im trying to get my window to update using update UpdateLayeredWindow, but no luck so far.
this is the function im using:
void update(HWND hwnd){<br />
HDC pDC = GetDC(hwnd);<br />
HDC dcMem;<br />
dcMem = CreateCompatibleDC(pDC);<br />
COLORREF colour;<br />
colour = RGB(255,255,255);<br />
HBITMAP bmp;<br />
bmp = LoadBitmap(GetModuleHandle(NULL), MAKEINTRESOURCE(IDB_BITMAP1));<br />
if(!bmp)MessageBox(NULL,"FAIL TO LOAD IMAGE", "ERROR",NULL);<br />
<br />
HBITMAP pOldBitmap = (HBITMAP) SelectObject(dcMem, bmp);<br />
<br />
<br />
BLENDFUNCTION blend;<br />
blend.BlendOp = AC_SRC_OVER;<br />
blend.BlendFlags = 0;<br />
blend.SourceConstantAlpha = 255;<br />
blend.AlphaFormat = AC_SRC_ALPHA;<br />
<br />
POINT ptSrc = {10, 10 };<br />
SIZE sz = { 100, 100 };<br />
UpdateLayeredWindow(hwnd, NULL, NULL, &sz, dcMem, &ptSrc, colour, &blend, ULW_COLORKEY );<br />
DWORD dwError = GetLastError();
<br />
DeleteDC(dcMem);<br />
DeleteObject(pDC);<br />
}
it compiles and runs fine is just that UpdateLayeredWindow is doing nothing.
thank you
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Maybe a silly question - Is the HWND a handle to a window created as a layered window?
If so...
Is the window a child window?
Mark
"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder
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yes is the handle to the window and no is not a child window.
i've also posted on this forum the code:
http://www.gamedev.net/community/forums/topic.asp?topic_id=449081
thank you
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Cool thanks for the link!
I don't think you should be calling SetLayeredWindowAttributes().
Try commenting out that call.
Mark
"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder
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