C / C++ / MFC

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How do I import a class? SuperTank23-Oct-04 13:30 SuperTank 23-Oct-04 13:30  Hi! I created this class inside a dll file. But how do I access it through my application? It wasnt as easy as I thought it would be. I tryed typing: class __declspec(dllimport) CNetwork; But that doesnt seam to work, just to create a whole new class called CNetwork. I couldnt access any of the functions I had in the class in the dll-file. What to do? Thanks humpa humpa Re: How do I import a class? ThatsAlok24-Oct-04 22:41 ThatsAlok 24-Oct-04 22:41  use MFC Extention DLL and using AFX_EXT_CLASS macro export your class. butbefore importing it in you application first include the header file which contain Class Declartion and the Lib file which contain runtime symbol for linking. ----------------------------- "I Think It Will Help" ----------------------------- Alok Gupta visit me at http://www.thisisalok.tk Re: Linking library BlackDice23-Oct-04 10:26 BlackDice 23-Oct-04 10:26  on your IDE's menu, click Project->Add Existing Item, and add the header file that way Who are all these people and what are they doing in my house?...Me in 30 years, inside a grocery store My articles[^] bdiamond console app closes jerrodab23-Oct-04 9:52 jerrodab 23-Oct-04 9:52  Newb question, im very new to c++, books im learning from say console app sould stay open with the message hit anykey to continue... but on my machine that dosent happen, after the program ends the console window closes so it is rather hard to see the resualts of the program. How do i keep it open with out adding some program lines to make it wait for some input after the rest of the progarm is done? Re: console app closes SuperTank23-Oct-04 10:01 SuperTank 23-Oct-04 10:01  press ctrl+F5 if your using Visual Studio. or add #include < Windows.h > among your header-files and system("pause"); on the buttom of main function humpa humpa Re: console app closes Anonymous23-Oct-04 16:06 Anonymous 23-Oct-04 16:06  You can also use getch() which is defined in conio.h. -John Grabbing images from Video Files AJ12323-Oct-04 9:18 AJ123 23-Oct-04 9:18  Hi there, I am developing a piece of code to grab images from Video files. Is the Video For Windows API still the way to go? As a side note, does anyone know how easy it is to grab images from DVDs? AJ Getting CMainFrame members from CView Leyu23-Oct-04 8:00 Leyu 23-Oct-04 8:00  I am trying to store top score (CString and int) (name and score) values to the registry They are declared in the CMainFrame Class and initialized with the default values and in OnCreate from the stored values from the registry i debugged it and seen that they are okay till the end of the OnCreate function; Used WriteProfileInt & WriteProfileString In OnClose and Used GetProfileInt &GetProfileString In OnCreate I wanted to update the values when the game is over and when game is over i post a message using PostMessage in The CView and in the handler function i use ((CMainFrame*)AfxGetApp())->m_strTopScore => now this value is null ((CMainFrame*)AfxGetApp())->m_iTopScore => now this value is 512 But As I said earlier the m_strTopScore was assigned a default value of "New Player" and the m_iTopScore=0; and when i try assign the m_strTopScore with new value ((CMainFrame*)AfxGetApp())->m_strTopScore="New String"; i get an ASSERT in line that says _AFX_INLINE CStringData* CString::GetData() const { ASSERT(m_pchData != NULL); return ((CStringData*)m_pchData)-1; } I used regedit and seen the stored default values in OnCreate i.e "NewPlayer" and 0 Why is the Value of 0 changed to 512 and NewPlayer to null There is no place this variables are modified ??????? Any Ideas??????? Re: Getting CMainFrame members from CView Michael P Butler23-Oct-04 8:47 Michael P Butler 23-Oct-04 8:47  Your question is a little confused. Are you storing your data in your CFrameWnd derived class (CMainFrame) or in your CWinApp derived class. AfxGetApp() returns a point to a CWinApp class and not your CMainFrame You need to use AfxGetMainWnd to get a pointer to your CFrameWnd derived class. Michael CP Blog [^] Re: Getting CMainFrame members from CView BlackDice23-Oct-04 9:34 BlackDice 23-Oct-04 9:34  you should also be able to use CView::GetParentFrame() Who are all these people and what are they doing in my house?...Me in 30 years, inside a grocery store My articles[^] bdiamond Re: Getting CMainFrame members from CView BlackDice23-Oct-04 10:04 BlackDice 23-Oct-04 10:04  Sorry, I didn't mean GetParentFrame(), I meant GetParent(). This is a line of code that I use in one of my applications: CMainFrame* pFrame = (CMainFrame*)GetParent(); then use pFrame->m_strTopScore ; make sure your variables are in the public section of your class definition for CMainFrame and make sure you #include "Mainfrm.h" in your view's .cpp file. Who are all these people and what are they doing in my house?...Me in 30 years, inside a grocery store My articles[^] bdiamond How to switch between windows? missnazar23-Oct-04 8:00 missnazar 23-Oct-04 8:00  Hi, When I press a push button on one dialog box ,other dialog box or form should be displayed.How Can I do that? Also please tell me how can we start an application B from other application A( eg. by pressing push button on application A). Drushti Re: How to switch between windows? Michael P Butler23-Oct-04 8:42 Michael P Butler 23-Oct-04 8:42  In the button click event handler, add something like <br /> CSecondDialog dlg;<br /> <br /> dlg.DoModal(); Have a read of CDialog::DoModal[^] for further info. Launching a FormView is slightly more complex, especially in an SDI app - have a read of Switching Views in a Single Document Interface Program[^] Michael CP Blog [^] Re: How to switch between windows? missnazar23-Oct-04 21:06 missnazar 23-Oct-04 21:06  Thakyou Michael , it really helped in my application. Drsuhti Re: How to switch between windows? BlackDice23-Oct-04 9:36 BlackDice 23-Oct-04 9:36  to start another application, use ShellExecute() Who are all these people and what are they doing in my house?...Me in 30 years, inside a grocery store My articles[^] bdiamond Re: How to switch between windows? missnazar23-Oct-04 20:36 missnazar 23-Oct-04 20:36  Hi bdiamond, How to use Shellexecute to switch to other application in VC++ by just clicling a push button?? Can u please elaborate on this ? Thankyou in advance. Drushti Re: How to switch between windows? BlackDice25-Oct-04 2:54 BlackDice 25-Oct-04 2:54  ShellExecute(NULL, "open", "myapplication.exe", NULL, NULL, SW_SHOWNORMAL); that will open an application and start it called "myapplication.exe", of course you'd have to replace that with the real name of your app. However if an application is already open, you would probably have to use something like FindWindow() to get the window's hWnd, then call SetForegroundWindow() or something like that. Who are all these people and what are they doing in my house?...Me in 30 years, inside a grocery store My articles[^] bdiamond Memory leak?? Bob Stanneveld23-Oct-04 7:17 Bob Stanneveld 23-Oct-04 7:17  Hello, I have a program program that is leaking memory. I commented out all the code that possibly could cause the leak, but the leak is still there. The following code is all there is left: <br /> int main()<br /> {<br /> return 0;<br /> }<br /> And when I run this code I get the following leaks: Detected memory leaks! Dumping objects -> {46} normal block at 0x00A42760, 792 bytes long. Data: <september> 53 65 70 74 65 6D 62 65 72 00 CD CD CD CD CD CD {45} normal block at 0x00A44C70, 448 bytes long. Data: <thu mbe="" wed=""> 54 68 75 00 6D 62 65 00 57 65 64 00 6D 62 65 00 {44} normal block at 0x00A446F8, 1328 bytes long. Data: <%a %b %e %H:%M:%> 25 61 20 25 62 20 25 65 20 25 48 3A 25 4D 3A 25 {43} normal block at 0x00A425C8, 344 bytes long. Data: <pm wed="" m:%=""> 50 4D 00 CD CD CD CD CD 57 65 64 00 4D 3A 25 00 {42} normal block at 0x00A42440, 320 bytes long. Data: <c sun=""> 43 00 CD CD CD CD CD CD 53 75 6E 00 CD CD CD CD Object dump complete. The thread 0x58C has exited with code 0 (0x0). I'm using STLPort with _REENTRANT defined and VC6.0. Are there any memory leaks in STLPort that I should know about? Multiply it by infinity and take it beyond eternity and you'll still have no idea about what I'm talking about. Re: Memory leak?? Yulianto.23-Oct-04 17:05 Yulianto. 23-Oct-04 17:05  I think that is not memory leak <italic>Work hard and a bit of luck is the key to success. You don`t need to be genius, to be rich. Re: Memory leak?? Bob Stanneveld24-Oct-04 2:08 Bob Stanneveld 24-Oct-04 2:08  Hello, Why do you think that it is no leak? Multiply it by infinity and take it beyond eternity and you'll still have no idea about what I'm talking about. Re: Memory leak?? Tim Smith23-Oct-04 18:14 Tim Smith 23-Oct-04 18:14  What you are seeing are false positives. Probably stuff that gets allocated as part of global variable initialization. The CRT memory report is happening prior to those global variables getting destroyed. Tim Smith I'm going to patent thought. I have yet to see any prior art. Re: Memory leak?? Bob Stanneveld24-Oct-04 2:07 Bob Stanneveld 24-Oct-04 2:07  Thanks for your reply. Since I ran the code this morning, the memory leaks disappeared! I'll be happy as long as they stay away Multiply it by infinity and take it beyond eternity and you'll still have no idea about what I'm talking about. Re: Memory leak?? Neville Franks24-Oct-04 0:18 Neville Franks 24-Oct-04 0:18  Turn on CRT Debug checks at the start of main() and off again at the end. See: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vsdebug/html/_core_using_the_debug_heap.asp Neville Franks, Author of ED for Windows www.getsoft.com and Surfulater www.surfulater.com "Save what you Surf" Re: Memory leak?? Bob Stanneveld24-Oct-04 2:02 Bob Stanneveld 24-Oct-04 2:02  Hello, Thanks for your reply. I was checking the leak again this morning and it disappeared! Anyway, as long as it stays this way... Multiply it by infinity and take it beyond eternity and you'll still have no idea about what I'm talking about. Error closing dialog Larsson23-Oct-04 6:55 Larsson 23-Oct-04 6:55  Well I get the error: ASSERT(::IsWindow(m_hWnd)); On my main dialog I show the modless dialog and on the modless dialog I try to close it. MAIN dialog CModless m_modless; m_modless.ShowWindows(SW_SHOW); // Works Greate Modless dialog (on close ) CModless m_modless; m_modless.ShowWindow(SW_HIDE); // Get the error. On initdialog on the main dialog I use, m_modless.Create(IDD_MODLESS); // To create the modless dialog. It works to show the dialog but not to close it. What Im I doing wrong?

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