C / C++ / MFC

FirstPrevNext

custom cursor 18-Jun-01 8:11 18-Jun-01 8:11  You know how if one selects multiple files in Explorer and then begins to drag them, an onscreen representation of those files is visible? I want to do something similar to that (not using a common control) an am trying to figure out the best method. I don't believe CreateCurosr will do, because one is limited to the system metrics for cursor size. Does anyone have an idea as to how the drag images larger than the 'standard' size are created in Explorer? TW Re: custom cursor Tomasz Sowinski18-Jun-01 8:19 Tomasz Sowinski 18-Jun-01 8:19  Check CListCtrl::CreateDragImage or LVM_CREATEDRAGIMAGE if you play directly with API. Tomasz Sowinski -- http://www.shooltz.com.pl Re: custom cursor 18-Jun-01 9:16 18-Jun-01 9:16  Thanks for your input, but as I mentioned in the original post, I am not using a common control such as the List View. I know I'll have to use the API directly, I'm just looking for some non-MFC, non-Common Control ideas of where to start. TW Re: custom cursor Tomasz Sowinski18-Jun-01 9:24 Tomasz Sowinski 18-Jun-01 9:24  Oops, sorry for the listview reference. Anyway, the easiest way is to follow the listview. It uses imagelist for drag'n'drop. You can 'manually' use imagelists, the functionality is exposed at the API level: ImageList_SetDragCursorImage ImageList_BeginDrag ImageList_DragMove ImageList_DragLeave ImageList_EndDrag ImageList_GetDragImage Look at the 'Dragging Images' section in the 'Image Lists' at MSDN. Tomasz Sowinski -- http://www.shooltz.com.pl NT...Win9X...problem.....memory leak??? 18-Jun-01 7:01 18-Jun-01 7:01  Hi, Thanks for all of your reply about my question before. THANK YOU VERY MUCH!!!! I try to keep posting my question, so that someone new can see this question and tell me how to fix it.... My major problem is: I have a program that was implemented in NT before and now want to transfer to Win9x. Everything is fine in NT, but in Win9x after the program has run for awhile, the output font change...include the system message box ( i know it because there is a message box ask me to terminate the program..haha..)......but it takes awhile to see the problem........when i do drawing....the problem happened immediately.....( not just draw a line......but a heavy drawing....).....cannot display colour....etc... I posted this question in codeproject.....and many people told me it would be a GDI resource leak....but i don't know how to fix it.... Oh...give you more backgrounds......it is a program using MFC...........and has a CDC global pointer to let other files to do drawing too...(not in view.cpp only....).....I'm just used some liked CPen or CBrush...then selectobject.....then something liked LineTo or MoveTo..... Thanks for your help..... Richard Re: NT...Win9X...problem.....memory leak??? Tomasz Sowinski18-Jun-01 7:10 Tomasz Sowinski 18-Jun-01 7:10  I posted this advice before, and I repeat it: you should get rid of the global DC. Just pass the CDC pointer from OnDraw to functions defined in other .cpp files. Your GDI leaks are (most probably) caused by the fact that pens, brushes and other GDI objects can't be freed when selected into any device context. void Leak(CDC *pDC) { CPen pen(...); pDC->SelectObject(&pen); // ... draw here } CPen's destructor will call ::DeleteObject for you, but it will fail - your pen is still selected. You should re-select before exiting the function: void TheRightStuff(CDC *pDC) { CPen pen(...); CPen *oldPen = pDC->SelectObject(&pen); // ... draw here pDC->SelectObject(oldPen); } Tomasz Sowinski -- http://www.shooltz.com.plC Re: NT...Win9X...problem.....memory leak??? Richard Cheng18-Jun-01 7:17 Richard Cheng 18-Jun-01 7:17  Oh.....i understand that now......let me try.... Thanks, Tomaxz....... THANK YOU THANK YOU THANK YOU!!!!!;P Serial Port. John Uhlenbrock18-Jun-01 6:33 John Uhlenbrock 18-Jun-01 6:33  I'm working on an application that talks to a device connected through the serial port. Is there anyone who has done this before and is willing to let me use their code as a reference? Thanks. - John - johnu@emersonprocess.com Another couple questions... John Uhlenbrock18-Jun-01 6:39 John Uhlenbrock 18-Jun-01 6:39  Take a look at this: http://msdn.microsoft.com/library/default.asp?URL=/library/wcedoc/wcecomm/serial_8.htm In the "PortReadThread (LPVOID lpvoid)" function they specify a set of events to be monitored for the port, then re-specify them inside the while loops. Is this necessary, and why is it done? ?!? error C2664: 'CreateThread' : cannot convert parameter 3 from 'unsigned long (void *)' to 'unsigned long (__stdcall *)(void *)' Thanks. - John - johnu@emersonprocess.com Re: Serial Port. D.D. de Kerf18-Jun-01 20:40 D.D. de Kerf 18-Jun-01 20:40  ONE approach is using the ActiveX component 'MSComm'. I'm helping somebody else through this component the last couple of weeks, so just search this forum on MSCOMM and you will find some tips and hints... If you find out a better way of talking to the serial port (or rather, a modem behind it!), please let me know! Structured programming vs. chaotic mind boggling File formats source code 18-Jun-01 6:14 18-Jun-01 6:14  Hi ! Where can I found a source code for an Identify Structure file format ? I need a function for detect file formats, like: EXE (PE Win32), EXE (DOS), COM, TXT, etc... not check the extension... but, check the internal file format. IdentifyStructure( char * cFile, char * cReturnFileType ) Thanks Re: File formats source code Chris Losinger18-Jun-01 6:34 Chris Losinger 18-Jun-01 6:34  www.wotsit.org -c ------------------------------ Smaller Animals Software, Inc. http://www.smalleranimals.com Re: File formats source code 18-Jun-01 6:56 18-Jun-01 6:56  Hi ! I know this website... But I need a ready source code... Thanks Re: File formats source code 19-Jun-01 0:39 19-Jun-01 0:39  In unix/linux, a utility called "file" allows you to do just this. It is gpl'ed so you will be able to get the source somewhere. Dunno where though. look about for it. Re: File formats source code markkuk19-Jun-01 21:28 markkuk 19-Jun-01 21:28  Have a look at the Unix/Linux "file" command, it identifies files based on a configurable database. The source code is at ftp://ftp.astron.com/pub/file/file-3.35.tar.gz Re: File formats source code 20-Jun-01 2:39 20-Jun-01 2:39  Thanks I´m test this program now... I send the result to here... Thanks Re: File formats source code 20-Jun-01 3:28 20-Jun-01 3:28  I think, open a file in binary mode and check the header for the type of that file. The formats can be obtained from sites like http://www.wotsit.org/ It must work. How to check if CD-Tray is open? 18-Jun-01 5:56 18-Jun-01 5:56  How can I check, if the CD-Tray is open? Normally I have to send a mciSendCommand with MCI_STATUS / MCI_STATUS_PARMS, but that won't work. Does anyone have an idea? I have to use this with MCI_SET_DOOR_OPEN / MCI_SET_DOOR_CLOSED. Thanks for support! Dirk q 70-016 18-Jun-01 4:53 18-Jun-01 4:53  Hi All ! Please help answering this question who is able to 62. You are using Visual C++ to create a component that will provide information to several different client applications Some of these applications have higher priority than others, and your component must prioritize requests for information. How should you develop your component? A. Develop your component to use HTTP to return information to client applications. Use a persistent property in the HTTP request to set priority. Pass information to client applications in order of priority B. Develop your component as an ActiveX user interface control. Add a Priority property to the control. Pass information to the client applications in order of priority. C. Develop your component as an in-process COM server component that accepts a reference to a notification object from each client application. Add a Priority property to this object. Use asynchronous callbacks to pass information back to the client applications in order of priority D. Develop your component as an out-of-process COM server component that accepts a reference to a notification object from each client application. Add a Priority property to this object. Use asynchronous callbacks to pass information back to the client applications in order of priority. Thanks. accessing files 18-Jun-01 4:42 18-Jun-01 4:42  in mfc what is the correct way to access files... before i have used something like: ifstream myStream("c:\test.txt"); if ( myStream.fail() ) { MessageBox("Failed!"); } else { MessageBox("Opened!"); } but i cant get this to work.... should i be doing something different? thanks Re: accessing files John Uhlenbrock18-Jun-01 6:51 John Uhlenbrock 18-Jun-01 6:51  I am not sure how to do this in MFC, but I *think* you need to modify what you posted in order to use fstream. Try.... ifstream myStream; myStream.open("c:\test.txt"); if ( myStream.fail() ) { MessageBox("Failed!"); } else { MessageBox("Opened!"); } - John - johnu@emersonprocess.com Re: accessing files Michael Dunn18-Jun-01 6:51 Michael Dunn 18-Jun-01 6:51  You need to escape the backslash - "C:\\test.txt" --Mike-- http://home.inreach.com/mdunn/ #include "buffy_sig" Play sound on PC- speaker 18-Jun-01 4:36 18-Jun-01 4:36  Hi, how can I play sound on the internal PC speaker? Like an sweep up od down, or anything else... It ist possible, because if you know WinAce 2.0 : When you extract an large ace-file and the extraction is complete the pc-speeaker goes "dililililip" So how can I do so? Thankz Ken Re: Play sound on PC- speaker Tomasz Sowinski18-Jun-01 4:44 Tomasz Sowinski 18-Jun-01 4:44  > the pc-speeaker goes "dililililip" They probably are using the Beep API function. It takes the frequency and duration as params. Tomasz Sowinski -- http://www.shooltz.com.pl Re: Play sound on PC- speaker 19-Jun-01 3:54 19-Jun-01 3:54  maybe, but this only works on Win2k /NT... ther must be a basic (C language or so... a MSDOS working function) way to play sound on speaker... Any idea? Ben

Last Visit: 31-Dec-99 18:00     Last Update: 4-Jun-24 2:53 Refresh ᐊ Prev1...18265182661826718268182691827018271182721827318274 Next ᐅ

General    News    Suggestion    Question    Bug    Answer    Joke    Praise    Rant    Admin   

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