C / C++ / MFC

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database Dennis L4-Dec-03 23:36 Dennis L 4-Dec-03 23:36  Hi All? can anyone tell me how can I connect my Win32 API (NO MFC)application with a .mdb database using DAO or ADO ( I don't want to use ODBC)??? Thanks for any answer! Re: database Steve S5-Dec-03 0:49 Steve S 5-Dec-03 0:49  I'd use the ATLDBCLI templates. Not MFC, not dependant on MFC, lighter-weight than ADO. Alternatively, if it's only ever going to be MDB, use the DAO SDK (which should be on the VC6 CD somewhere) Steve S Re: database database Dennis L5-Dec-03 4:29 Dennis L 5-Dec-03 4:29  Does DAO SDK works without linking my application with MFC dll?? Re: database database Steve S5-Dec-03 5:50 Steve S 5-Dec-03 5:50  Yes, as far as I know there are no dependencies on MFC in the DAO SDK. Note that this ISN'T the same as the CDaoXXXXX stuff from MFC, of course. Steve S Displaying Images ineedhelp4-Dec-03 22:54 ineedhelp 4-Dec-03 22:54  Hi guys, I need to be able to display jpgs as a background for an MFC dialog based application but have no idea where to start. Any methods are greatly appreciated. Xtremean Re: Displaying Images Monty25-Dec-03 1:45 Monty2 5-Dec-03 1:45  search in MSDN for IPicture article by paul dilascia Re: Displaying Images Big Art5-Dec-03 5:38 Big Art 5-Dec-03 5:38  If you are using VC7, MFC has a new class called CImage that lets you load any image format. OR You could use a the new CDHtmlDialog class and use HTML to display the jpg. Art void-casting unused return values Johann Gerell4-Dec-03 22:42 Johann Gerell 4-Dec-03 22:42  I've noticed a (bad?) habit from some colleagues of mine to void-cast unused return values, as in (void)::SystemTimeToFileTime(&st, &ft) I've personally never ever done that in C/C++, but something like it when scripting bash back in my dark Linux days (don't ask...) Why on earth are they doing it and is it even necessary? I hope someone will say it's not recommended and provide a good link to Bjarne etc... -- Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so. (Douglas Adams) Re: void-casting unused return values фил4-Dec-03 23:10 фил 4-Dec-03 23:10  it could be some kind of convention they're using. There're many awkward conventions my friend, most of them nobody knows about; it's like politics. Phil Re: void-casting unused return values Mike Dimmick4-Dec-03 23:44 Mike Dimmick 4-Dec-03 23:44  It's basically a semantic marker: it says 'Yes, I know that this function has a return value, but I'm deliberately ignoring it.' Some style manuals suggest doing this, I believe - if a function returns a value, you should either use the value, or cast to void. From the compiler's perspective, it should compile exactly the same code whether or not this cast is here. Personally, although I've done it on a couple of occasions, I don't normally bother. It's more typing for no real value. In the case of SystemTimeToFileTime, the function could fail if the SYSTEMTIME structure contains duff information (e.g. 31st of February, or a year before 1601). Re: void-casting unused return values cmk5-Dec-03 11:40 cmk 5-Dec-03 11:40  This style used to be used by UNIX programmers to state "yes i know the function returns 'x', but i have no use for the return value". This was a bit of a fallout from the belief that if a function returned a value the value should be checked (religiously). It was most often used for things like printf(), or when the function returned an error code, but that there was nothing usefull the program could do in case of an error (e.g. testing if malloc() returned null). It is purely stylistic. ...cmk Rosencrantz: I don't believe in it anyway. Guildenstern: What Rosencrantz: England Guildenstern: Just a conspiracy of cartographers then. Save the whales - collect the whole set Re: void-casting unused return values Joe Woodbury5-Dec-03 20:54 Joe Woodbury 5-Dec-03 20:54  While it is stylistic, and I loathe it, many, many years ago, there were C compilers that emitted a warning if the return value from a function wasn't either checked or used to set a variable. Anyone who thinks he has a better idea of what's good for people than people do is a swine. - P.J. O'Rourke standalone CHeaderCtrl: how to make text non-bold? ckorda4-Dec-03 22:41 ckorda 4-Dec-03 22:41  I'm trying to use CHeaderCtrl standalone (without a CListCtrl) but it insists on making its text bold, which looks totally stupid. I can't for the life of me figure out how to make it use the non-bold system font that it uses when it's part of a CListCtrl (the same one menus, edit controls, etc. use). The CHeaderCtrl is a member of my CMainFrame class, and I create the control in CMainFrame::OnCreate. I tried calling the control's SetFont member, before and after creating the columns, with and without redraw, and with every type of CFont I could think of, all to no avail. Is this a bug in MFC? ~CK int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct) { if (CFrameWnd::OnCreate(lpCreateStruct) == -1) return -1; // create header control above CFormView CRect r; GetClientRect(r); r.bottom = HEADER_HEIGHT; m_Hdr.Create(WS_CHILD | WS_VISIBLE, r, this, 0); // try to get rid of stupid bold font WHY DOESN'T THIS WORK?!? CFont *pFont = (CFont *)GetDC()->SelectStockObject(DEFAULT_GUI_FONT); SetFont(pFont, TRUE); // populate header HDITEM hdi; const cols = 3; LPCSTR str[cols] = {"Volume", "Pan", "Pitch"}; int wid[cols] = {172, 172, 172}; hdi.mask = HDI_TEXT | HDI_WIDTH | HDI_FORMAT; hdi.fmt = HDF_LEFT | HDF_STRING; for (int i = 0; i < cols; i++) { hdi.pszText = (char *)str[i]; hdi.cchTextMax = strlen(str[i]); hdi.cxy = wid[i]; m_Hdr.InsertItem(i, &hdi); } return 0; } Re: standalone CHeaderCtrl: how to make text non-bold? Jack_Cai5-Dec-03 2:48 Jack_Cai 5-Dec-03 2:48  This is because of the setting of "Display properties". Change your setting of display in the control panel and set the header text font as non-bold font. Re: standalone CHeaderCtrl: how to make text non-bold? ckorda5-Dec-03 4:45 ckorda 5-Dec-03 4:45  I'm not sure. First of all I don't see a setting for header text in the display properties, not in Windows 2000. I even tried selecting the Windows Classic BIG FONT setting, and it changed a lot of text all over the place, but not CHeaderCtrl's text. And in any case, it makes no sense that a CHeaderCtrl should use non-bold when it's embedded in a CListCtrl (i.e. in just about every MFC app in the world) and bold when it's embedded in a CFrameWnd. It seems to me it's either an MFC bug, or there's something magical that CListCtrl does to its CHeaderCtrl that I haven't figured out how to do. ~CK this is how to make a CHeaderCtrl non-bold (1 line) ckorda5-Dec-03 9:41 ckorda 5-Dec-03 9:41  Assuming m_Hdr is a member variable of type CHeaderCtrl, in whatever function creates m_Hdr, immediately after m_Hdr.Create(...), add this line: m_Hdr.SendMessage(WM_SETFONT, (WPARAM)GetStockObject(DEFAULT_GUI_FONT)); ***NOTE*** that the following does *NOT* work: m_Hdr.SetFont((CFont *)GetStockObject(DEFAULT_GUI_FONT)); Why? I don't know. Maybe because SetFont posts the message, instead of sending it, so that the temporary font pointer returned by GetStockObject is already garbage by the time the header control receives the message? ~CK Loading all the Icons name from the local or remote directory into a combo box Ravindran4-Dec-03 22:29 Ravindran 4-Dec-03 22:29  Hello Guys, i need some help regarding loading icons from a local directory in VC++, in my app there is a combo box... if i pass an directory name to the app.. then all the file names of the icon's in that directory should be loaded in the Combo Box. post with some sample code toooo for the above question Thanks in advance Hariharan.S.N ravi Re: Loading all the Icons name from the local or remote directory into a combo box фил5-Dec-03 3:44 фил 5-Dec-03 3:44  1. construct the CFileFind class 2. Call FindFile() 3. enter a loop that ends if you can't do 4 4. Call FindNextFile() 5. use CFileFind's get procs to filter out the icons and do whatever you want with those filenames Phil Display bmp file in windows suneetchandok4-Dec-03 22:08 suneetchandok 4-Dec-03 22:08  Hi guys i have made resizable combo box. i need to display a bmp in the scroll bar. Can any body tell me whch api to use I have a handle of HDC in my combo box Regards Suneet Chandok Re: Display bmp file in windows Monty25-Dec-03 1:49 Monty2 5-Dec-03 1:49  bhai phat legi is kaam me you will have to derive a class from CScrollWnd and in onpaint call CScrollWnd's Onpaint and then paint ur bitmap , then use this new class and add scroll support to CCmboBox Object-oriented design in a pure Win32 application Rickard Andersson204-Dec-03 21:57 Rickard Andersson20 4-Dec-03 21:57  How do you do to accomplish an object-oriented desing in a pure Win32 API written application? No, MFC, WTL or any other frameworks. And don't post dummy questions and ask why I wanna do this etc etc etc... Thanks! Rickard Andersson Here is my card, contact me later! UIN: 50302279 Sonork: 37318 Re: Object-oriented design in a pure Win32 application Johann Gerell4-Dec-03 22:17 Johann Gerell 4-Dec-03 22:17  I presume what you mean is actually "How do I encapsulate the HWND in a C++ class and make a proper class hierarchy?" Otherwise stop read here. How you design the hierarchy depends on your own ability to design - if you have done it in another area, then you can do here also. The tricky part encapsulating the HWND and maintaining window procedures is to associate a class instance with a particular physical window, i.e., HWND with this. This can be done in many ways: ATL/WTL uses thunking and MFC a hash map, but it can be as simple as stashing the this pointer in the userdata section of the window with ::SetWindowLong() or setting this as a window property with ::SetProp() or even using a global variable (but that would not get us very far...) I would, however, recommend WTL. -- Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so. (Douglas Adams) Re: Object-oriented design in a pure Win32 application Michael P Butler5-Dec-03 2:37 Michael P Butler 5-Dec-03 2:37  Rickard Andersson18 wrote: How do you do to accomplish an object-oriented desing in a pure Win32 API written application? No, MFC, WTL or any other frameworks. Have a read of Windows++[^] Michael Blue canary in the outlet by the light switch Who watches over you Make a little birdhouse in your soul - They Might Be Giants MFC-Dialog based: Is ther something like &quot;OnShow&quot; ?? bjolletts4-Dec-03 21:57 bjolletts 4-Dec-03 21:57  Is there a such message for a dialog based program like "WM_SHOW" that indicates that the dialog has been shown on the screen ? I would like perform a certain task just when the dialog has bee n displayed to the user. Cant use OnPaint (and have a "do once" flag) since the task waits for the user to put his finger on a fingerprint scanner. So if he then moves the window or something the program will hang ... OnCreate, OnInitDialog, OnShowWindow all runs before the dialog is shown ... any ideas ? Thanks, Daniel Re: MFC-Dialog based: Is ther something like &quot;OnShow&quot; ?? forjer5-Dec-03 2:49 forjer 5-Dec-03 2:49  What about OnActivate or OnFocus? (not 100% sure these are the exact names).

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