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Hello people,
I am using MCI commands to play AVI movies and
I would like to draw the frames on a specific region in the window using its device context (HDC of the window).
I know that we can use the Window handle of the target windows as a parent handle for the video, but in my case using the Device Context would be better.
Does someone know if MCI commands can solve this problem?
Thank you for your attention.
Atlus_
Is there any way to perform an AVI playback using the device context (HDC) of a Window. The way I know
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I got a bug report on a program that I wrote saying that when it tries to open the file dialog that it crashes under windows 2000 professional. I used to following function to open a "file open" dialog:
BOOL DlgGetFileName(HWND hWnd,LPSTR lpszTitle,LPSTR lpszFormat,LPSTR lpszFileName,BOOL save)
{ OPENFILENAME of;
int result;
// Initialize the OPENFILENAME members
of.lStructSize = sizeof(OPENFILENAME);
of.Flags = OFN_ALLOWMULTISELECT | OFN_HIDEREADONLY | OFN_NOCHANGEDIR |
OFN_FILEMUSTEXIST | OFN_EXPLORER;
of.hwndOwner = hWnd;
of.hInstance = hInst;
of.lpstrFile = lpszFileName;
of.lpstrFilter = lpszFormat;
of.nFilterIndex = 1;
of.nMaxFile = 5120;
of.lpstrInitialDir = NULL;
of.lpstrTitle = lpszTitle;
of.lpTemplateName = 0;
of.lpfnHook = NULL;
of.nFileOffset = FileOffset;
// Display the dialog
if (save) result=GetSaveFileName(&of);
else result=GetOpenFileName(&of);
return result;
}
Does anyone have any ideas why this would crash? I will give credit for the fix if you help me out... I am thinking there must be a problem with the file open common dialog and windows 2K, maybe windows 2K uses different common dialogs that win 98 or something and my code doesn't take that into account?
Thanks for any ideas,
Jon (webmaster@compumatrix.com)
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The OPENFILENAME struct was made bigger for the Win2K features - you'll need to check the OS at runtime and set the lStructSize accordingly: 76 for 9x/NT4 and OPENFILENAME_SIZE_VERSION_400 for Win2K. MSDN has all the details in the OPENFILENAME page.
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I presume you are passing the correct parameters to the function?
Also, you use the flag OFN_NOCHANGEDIR, but set lpstrInitialDir to NULL. Although if the file anme contains a path, the folder containing the file should be selected, it could be your problem.
Why it should work on Win98 but not Win2K I have no idea.
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Hi
Does anyone know how to access the video memory portion that contains the desktop screen? Does anyone know if it's possible to access this surface directly using CreateSurface in DirectDraw or I definitely have to use GDIs?
Thank you very much for your time!
Susan
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only way I know is:
CWnd * pDesktop = GetDesktopWindow();
CDC * pDC = pDesktop->GetWindowDC();
...
//Mess around with DC
...
pDesktop->ReleaseDC(pDC);
I suppose you could create a copy in memory before BitBlt'ing it back? I'm sure someone else on here has a *much* better way....
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How to get path to application execuable file???
Please send me solution on my email;
piopawlu@interia.pl;
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I just get the value stored in
CWinApp::m_pszHelpFilePath
and do a CString::Replace(".HLP", ".EXE");
e.g
in CWinApp::InitInstance(...)
...
CString strPathExe = m_pszHelpFilePath;
strPathExe.Replace(".HLP", ".EXE");
...
It can't be the best way, but it's always worked for me.
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Does anyone know of any "AOL like Instant Messenger" software that I could integrate into a custom designed application. It doesn't need to work with AOL (or any other proprietary type system). I would just like to give my users the ability to quickly send messages to other users that are logged on. Maybe a simple ICQ chat would do? Any suggestions?
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I seem to remember someone posting a socket-based IM program either here or on CodeGuru.
AlsI think there are a number of OpenSource IM programs, although I don't know which to recommend. Sorry!
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Does anyone know of a revision control system that I could easily integrate into a custom designed application? My users need to be able to check in/out text files and view past revisions. I would like to be able to setup a document server and then add simple menu button to my application to give my users access to the files. All of the revision control systems that I have seen are either a) standalone systems without any integration, b) expensive when you need a site license, or c) bloated with features that my users don't need. Can anyone offer any suggestions?
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Yes, you can use GNU RCS, which comes with source code. However, since it's GPL'd you'll also have to release your source with it.
The other things you can do is simply use RCS standalone executables and just call them from within your program.
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Does anyone have a free line drawing control that can be used in VC6 like the one in VB6? I want to visually
draw lines on a dialog box or CFormView-derived view. The hard way is to implement the OnDraw() event handler,
but doing it visually at design time would be terrific.
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If I've ever needed to draw a line, I've always done a really thin control.
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I'm trying to write a program that will allow reliable transfer of files between computers on a network. It would be very useful if I could list all the uses user names on a network as network Neighborhood does.
Is there a way to do this?
Thank you for any help
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How do I print the GIF file from a VC++ application
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Do you know what the GIF is ? I assume not, in which case you'll need to either
a/ forget it or
b/ pay UNISYS a swag of money.
GIF uses LZW compression, and even if your program doesn't make money, you need to pay them if you support GIF. That's why a lot of graphics software ( mine included ) does not support GIF. Assuming you chose GIF at random, the answer for any other format is you need first to read it in, which entails using a library like paintlib ( www.paintlib.de ), then it's merely a case of stretching it onto a print DC. I say stretch because printers measure size in TWIPs and a screen shot in pixels equates to enough TWIPs to make a small postage stamp.
If you're using Doc/View most of the work is done for you, if not, there are classes on this page that will give you everything you need.
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don't!
if your app reads GIF files, you have to get a license from the Unisys corporation. this applies even if you use an external appliation (like IE) to read and render the image.
use a different format, if possible.
-c http://www.smalleranimals.com
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I would like to create a dialog window from a win32 console program, but i dont know how to go about doing
this. Anyone know how? I created the CALLBACK procedure, and the resource template, but when i go to call
CreateDialog(), i do know what to pass in for the current instance, and the parent window, and NULL does
not work (it will compile, but it won't create the window).
--Dave
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I would like to create a dialog window from a win32 console program, but i dont know how to go about doing
this. Anyone know how? I created the CALLBACK procedure, and the resource template, but when i go to call
CreateDialog(), i do know what to pass in for the current instance, and the parent window, and NULL does
not work (it will compile, but it won't create the window).
--Dave
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Hi Dave
I think what is missing is
ShowWindow(SW_SHOW);
NULL as a parent works fine, I tested it
CTestDlg::CTestDlg(CWnd* pParent)
: CDialog(CTestDlg::IDD, pParent)
{
Create(CTestDlg::IDD, pParent);
ShowWindow(SW_SHOW);
}
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I have a memory address stored in a variable (gotten from a stackwalk), like so
int address = 0x00FE3D; // an arbitary address
How can I check whether my process has access to that address??.
PS. I was looking at IsBadReadPtr() but it requires a pointer to memory block. How can I get a pointer that points to the value specified in a variable?
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Just pass a block size of 1:
void* pv = (void*) 0xfe3d; <br />
bool bCanRead = !IsBadReadPtr ( pv, 1 );
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Is there any function, etc, available to search through all the items in a tree ctrl by name?
E.g. I populate a tree ctrl, then need to go back and add a new item 'D' as a child of item 'C':
ROOT
|-A
| |-B
| |-C
| |-E
|-F
|-G
Becomes:
ROOT
|-A
| |-B
| |-C
| | |-D
| |-E
|-F
|-G
How can I find and return the HTREEITEM pointer to 'C'?
Thanks for any help,
David Wulff
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http://codeguru.earthweb.com/treeview/find_item.shtml
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