C / C++ / MFC

FirstPrevNext

Re: How to capture mouse events from a control within a Dialog Box? Arris7422-Jan-07 6:07 Arris74 22-Jan-07 6:07  What ? Strange ! Which version of VS you are using ? I use VS2003. Actually When I right click the ListCtrl control and I select Add Class, There are only 3 or classes available ( CDialog, Cpropertypage etc..) but no CListCtrl. Re: How to capture mouse events from a control within a Dialog Box? prasad_som24-Jan-07 17:32 prasad_som 24-Jan-07 17:32  Use class view to add class, instead. Prasad Notifier using ATL | Operator new[],delete[][^] Re: How to capture mouse events from a control within a Dialog Box? Arris7427-Jan-07 6:52 Arris74 27-Jan-07 6:52  That's ok. I've got the solution. thanks anyway. Re: How to capture mouse events from a control within a Dialog Box? Waldermort22-Jan-07 2:28 Waldermort 22-Jan-07 2:28  You have derived from CDialog, but the trouble is mouse messages are sent to the controls ( your list control ) not the dialog itself. You need to derive a class from the list control and handle the messages from there. Another way you could handle this is checking the message paramater of the MSG struct after each call to GetMessage(). Though I'm not exactly sure how you adjust the message loop in MFC. Re: How to capture mouse events from a control within a Dialog Box? Arris7422-Jan-07 6:33 Arris74 22-Jan-07 6:33  You have derived from CDialog, but the trouble is mouse messages are sent to the controls Actually, the messages are correctly routed to the CDialog. But when the mouse is within the control, I do not know where the messages are routed. You need to derive a class from the list control and handle the messages from there I derived a class from CListCtrl but no messages are routed to this class. Though I'm not exactly sure how you adjust the message loop in MFC. What is the procedure to do this? What is entry point in VC++ to setup this? Pass a sting to a dll that neads a WCHAR Calvin Streeting22-Jan-07 2:02 Calvin Streeting 22-Jan-07 2:02  Hi.. I am having trouble passing a string of a file name (from VB to my c++ DLL) the function StgOpenStorage requires a "const WCHAR*" for the filename. so what type should i pass to it. I would prefer to pass a VB string and let the DLL do the relevant transulation of types (i don't want to use strPtr(filename) in VB many thanks sample code //------------------------------------------------------------- SSFILEDLL_API bool __stdcall OpenEmail(fileName) { if (bIsopen == false) { HRESULT hr; hr = MAPIInitialize(NULL); if (FAILED(hr)) return false; hr = OleInitialize(NULL); if (FAILED(hr)) return false; //get storage from msg file //here is the bit where the filename is used //hr = StgOpenStorage(L"C:\\Email.msg" works but i want to pass it from vb hr = StgOpenStorage(filename , NULL, STGM_READWRITE | STGM_TRANSACTED | STGM_SHARE_EXCLUSIVE, NULL, 0, &pStorage); if (FAILED(hr)) return false; //open a IMessage session hr = OpenIMsgSession (pMalloc, 0 , &pMsgSession); if (FAILED(hr)) return false; //open an IMessage on the IStorage object hr = OpenIMsgOnIStg(pMsgSession, MAPIAllocateBuffer, MAPIAllocateMore, MAPIFreeBuffer, pMalloc, NULL, pStorage, NULL, 0,0,&pSourceMsg); if (FAILED(hr)) { return false; } else { bIsopen = true; return true; } } else { return false; } } Re: Pass a sting to a dll that neads a WCHAR toxcct22-Jan-07 2:15 toxcct 22-Jan-07 2:15  read the posting guidelines[^], especially when you post huge code blocks. Calvin Streeting wrote: Pass a sting wow, that'll be hard Don't know where to start ? Refer the Forums Guidelines and ask a friend [VisualCalc 3.0][Flags Beginner's Guide] Re: Pass a sting to a dll that neads a WCHAR James R. Twine22-Jan-07 3:01 James R. Twine 22-Jan-07 3:01     I was under the impression that VB strings were wide/Unicode by default, and would be in the form of a BSTR (BSTR == BASIC String, IIRC), which is already a wide string.    You can pass a BSTR in place of a const wchar_t* or const WCHAR* just fine.  As far as how to get that BSTR directly to the function in the DLL, I cannot help you there - I do not do VB, nor am I 100% certain that the internal format of the BSTR is exactly the same as its external/COM format.    Peace! -=- James Please rate this message - let me know if I helped or not!<HR>If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong! Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road! See DeleteFXPFiles Re: Pass a sting to a dll that neads a WCHAR Calvin Streeting22-Jan-07 3:30 Calvin Streeting 22-Jan-07 3:30  I thought so but if I... SSFILEDLL_API bool __stdcall OpenEmail(BSTR FileName) then the StgOpenStorage fails but if i hard code in the filename L"c:\\email.msg" it works... am i missing some thing Re: Pass a sting to a dll that neads a WCHAR James R. Twine22-Jan-07 4:27 James R. Twine 22-Jan-07 4:27     StgOpenStorage(...) fails when?  At compile time, at run time, and with what error?  Oh, and that should be a const BSTR parameter - you are not going to modify it so it can be constant.    Peace! -=- James Please rate this message - let me know if I helped or not!<HR>If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong! Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road! See DeleteFXPFiles Re: Pass a sting to a dll that neads a WCHAR Calvin Streeting22-Jan-07 4:53 Calvin Streeting 22-Jan-07 4:53  if i use "const BSTR filename" it compiles ok but fails at run time (StgOpenStorage(..) returns -2147287038) when called. it also sometimes crashes the vb app. Many thanks for your help Re: Pass a sting to a dll that neads a WCHAR James R. Twine22-Jan-07 5:08 James R. Twine 22-Jan-07 5:08     Examine the string in the debugger (run the DLL under the debugger by specifying the VB application as the executing application), and see if the string looks valid or not.    Peace! -=- James Please rate this message - let me know if I helped or not!<HR>If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong! Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road! See DeleteFXPFiles Re: Pass a sting to a dll that neads a WCHAR Calvin Streeting22-Jan-07 5:21 Calvin Streeting 22-Jan-07 5:21  ok now you are hitting the limit of my c++ (this is my first c++ program ).. i feel i might need to read the section on debuging... but for you info it shows szString = 0x0013c884 |__ 12849 which i take it is ram address?... is there any way to get it to print out the BSTR or msgbox it.... calvin Re: Pass a sting to a dll that neads a WCHAR James R. Twine22-Jan-07 8:09 James R. Twine 22-Jan-07 8:09     You need your debugger configured to show Unicode strings, and that will allow you to see if the value you are seeing can be treated as a BSTR or not.    You can use MessageBoxW(...) to see the value by doing something like this: ::MessageBox<code>W</code>( szString, L"The String", MB_OK );    Pay attention to the "W" in ::MessageBoxW(...).  The call to MessageBoxW will either show the contents of the string (if the string pointer is valid), or will likely crash or show garbage if not.    Peace! -=- James Please rate this message - let me know if I helped or not!<HR>If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong! Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road! See DeleteFXPFiles Re: Pass a sting to a dll that neads a WCHAR Calvin Streeting22-Jan-07 9:30 Calvin Streeting 22-Jan-07 9:30  Hi.. I found out that bit about setting debuger options and have done it (thanks for the clue) and i have found that szString = 0x0013D374 ??????g so i used the memory tool (learning how to debug, this is simular to pic asm) and found the memory and it says 0013D374 43 3A 5C 5C 65 6D 61 69 6C 2E 6D 73 67 00 00 00 0D C:\\email.msg.... so am i right in thinking it is not getting through... so back to google Many thanks for you help i will "Please rate this message - let me know if I helped or not!" once i have this working, infact even if i don't as you have been very helpfull Re: Pass a sting to a dll that neads a WCHAR [modified] Calvin Streeting22-Jan-07 11:03 Calvin Streeting 22-Jan-07 11:03  Ok finaly got it.... convert 1. Pass Char * from vb to C++ 2. covnvert to BSTR 3. Pass to StgOpenStorage(...) reason vb passed a "8 bit ANSI string" function wanted a "Wide UNICODE string" see below SSFILEDLL_API bool __stdcall OpenEmail(char *FileName) { if (bIsopen == false) { HRESULT hr; hr = MAPIInitialize(NULL); if (FAILED(hr)) return false; hr = OleInitialize(NULL); if (FAILED(hr)) return false; //convert Char * to BSTR BSTR bFileName; int count = 0; count = MultiByteToWideChar(CP_ACP, 0, szString , strlen(szString), NULL , 0); if(count > 0) { bFileName = SysAllocStringLen(0, count); MultiByteToWideChar(CP_ACP, 0, szString , strlen(szString), bFileName , count); } //get storage from msg file hr = StgOpenStorage(bFileName , NULL, STGM_READWRITE | STGM_TRANSACTED | STGM_SHARE_EXCLUSIVE, NULL, 0, &pStorage); if (FAILED(hr)) { return false; } else { return true; } } else { return false; } } once again many thanks, it works, it works err ok what was next for your information this code is for http://ssfiledll.sourceforge.net/ -- modified at 19:52 Monday 22nd January, 2007 Dragging A Rectangle Franz Klein22-Jan-07 1:48 Franz Klein 22-Jan-07 1:48  I am looking for VC++ code on how to drag a rectangle. It must not be Managed C++. But something that will work with VS2003. I have seen such code somewhere here on CodeProject but multiple searches hasn't revealed anything. Anybody that can direct me please? I am the handsome one in the crowd. Playing Ogg Files srikanth rao nadipelli22-Jan-07 1:22 srikanth rao nadipelli 22-Jan-07 1:22  hello everybody, My name is Srikanth.I am new to the discussion board.I have a problem in My application ie, i cant play ogg files. when i am rewinding or forwarding the file then an error is occuring and the error is "couldnt read from specified memory location" and i tried to find it but my effort was in vain. So I am in very much need of ur help.kindly help me. srikanthrao CMultiDocTemplates [modified] baerten22-Jan-07 1:03 baerten 22-Jan-07 1:03  Hi everyone, in a big appliaction, we have certainly 50 different Windows. My application is an MDI-Style. So i need for example 50 CMultiDocTemplates for f.ex. 50 different MDI-Frames. Is it the right way or is it easier to create dynamically an Frame and there'in creating his View ? In all examples and books it's explained with Templates but is it also used in professional-life ? Thanks a lot -- modified at 7:23 Monday 22nd January, 2007 ebook i.e. soft copy of book on ATL COM required cancerion22-Jan-07 0:46 cancerion 22-Jan-07 0:46  i want a ebook i.e. soft copy of book on ATL COM , so please send me a link or book on my mail is tosachingupta@yahoo.com Re: ebook i.e. soft copy of book on ATL COM required Don Box22-Jan-07 1:27 Don Box 22-Jan-07 1:27  Hello Sachin! I've e-book of ATL. If u want it, come online at jubinc@skype. Come online at:- jubinc@skype Re: ebook i.e. soft copy of book on ATL COM required nutkase22-Jan-07 2:07 nutkase 22-Jan-07 2:07  hi, can you mail me the book as well at je_shoaib@hotmail.com thanks SendMessage does not work Shailesh Ha22-Jan-07 0:40 Shailesh Ha 22-Jan-07 0:40  Hi , I have a embededVC code something like this: DWORD wc = WaitForMultipleObjects( sizeof(hObjectList)/sizeof(HANDLE), // number of handles in array hObjectList, // object-handle array FALSE, // wait option (DWORD) INFINITE // time-out interval ); switch ( wc) { case WAIT_OBJECT_0: break; case WAIT_OBJECT_0 + 1: //Center button if (WaitForSingleObject(hCenterState,0)==WAIT_OBJECT_0) { /*hCenterState button pushed*/ ::SendMessage(hWnd,WM_TRIGGER_PULL,0,0); } break; } the above code is in a function which is on a thread (obviously) ...(. thread is initiaited on WM_INITDILAOG of the dialog.I pass the dialog handle to the creathread function) Problem is that the SendMessage function posts a message WM_TRIGGER_PULL only for the first time i open the dialog.If i exit the dialog and then open it again , this time the SendMessage does not post the WM_TRIGGER_PULL message. i cant get y it cant post the msg the second time. Any body has solution to this is most welcome with a reply. thanks in Advance Re: SendMessage does not work Jonathan [Darka]22-Jan-07 1:44 Jonathan [Darka] 22-Jan-07 1:44  Please stop reposting. Post a question once only, else people will ignore them. Jonathan Wilkes Darka [Xanya.net] Re: SendMessage does not work toxcct22-Jan-07 1:55 toxcct 22-Jan-07 1:55  read the Forum Posting Guidelines[^] PLEASE ! Don't know where to start ? Refer the Forums Guidelines and ask a friend [VisualCalc 3.0][Flags Beginner's Guide]

Last Visit: 31-Dec-99 18:00     Last Update: 27-Jun-24 11:47 Refresh ᐊ Prev1...7616761776187619762076217622762376247625 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.