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CDateTimeCtrl Djibril12-Sep-02 10:10 Djibril 12-Sep-02 10:10  Hi, I added a CDateTimeCtrl on my dialog. Then I added a CTime member variable like this: in MyDialog.h : CTime m_dateWarranty; in MyDialog.cpp : DDX_DateTimeCtrl(pDX, IDC_DATETIMEPICKER_WARR, m_dateWarranty); Link gives the following error: error LNK2001: unresolved external symbol "void __stdcall DDX_DateTimeCtrl(class CDataExchange *,int,class CTime &)" (?DDX_DateTimeCtrl@@YGXPAVCDataExchange@@HAAVCTime@@@Z) Thanks, Where there is a WISH, there is a WILL. Re: CDateTimeCtrl Joaquín M López Muñoz12-Sep-02 11:50 Joaquín M López Muñoz 12-Sep-02 11:50  Try #includeing <afxdtctl.h>. Joaquín M López Muñoz Telefónica, Investigación y Desarrollo Re: CDateTimeCtrl Djibril12-Sep-02 12:06 Djibril 12-Sep-02 12:06  This solved my problem! Thank you so much. Where there is a WISH, there is a WILL. var value can't be assigned jimNLX12-Sep-02 10:03 jimNLX 12-Sep-02 10:03  I have a var that I'm setting in my code on a timer, when I stop the code in the debugger and step through it, it doesn't set the value to anything. Why? The only time I get it to take a value is when I use a constant. The code is basically x = y, y has a value of 1.234 but x is alway 0.0000. Any idea why this would happen? Re: var value can't be assigned Ravi Bhavnani12-Sep-02 11:00 Ravi Bhavnani 12-Sep-02 11:00  Are both x and y floating point variables? Are you sure y isn't zero? Are you sure x isn't being set? Post the code - it seems you're doing something wrong. /ravi Let's put "civil" back in "civilization" http://www.ravib.com ravib@ravib.com Re: var value can't be assigned jimNLX12-Sep-02 11:33 jimNLX 12-Sep-02 11:33  Yes x and y are both floating point numbers. This is the code I'm looking at: m_mf2_rngcntdwn (this is a float defined in an edit box) = ThreatStruct.cvf[0].fSlantRange; In the debugger fSlantRange = 1.234 as I have hard coded this in and check it in the debugger. m_mf2_rngcntdwn = 0.0000...and never changes. Re: var value can't be assigned Joaquín M López Muñoz12-Sep-02 11:42 Joaquín M López Muñoz 12-Sep-02 11:42  If (by chance) what you're noticing is that the value displayed in the edibox does not change, try calling UpdateData(FALSE) after the line where you assign m_mf2_rngcntdwn. Joaquín M López Muñoz Telefónica, Investigación y Desarrollo Re: var value can't be assigned jimNLX12-Sep-02 11:45 jimNLX 12-Sep-02 11:45  I thought this might be the case and have verified that the box will update when the value changes. Thanks. Re: var value can't be assigned Ravi Bhavnani12-Sep-02 11:44 Ravi Bhavnani 12-Sep-02 11:44  Hmm, that's odd if the debugger says m_mf2_rngcntdwn remains zero immediately after you do the assignment. You said m_mf2_rngcntdwn is a "float defined in an edit box". But it's just a float variable, right? Sorry if I'm being anal, but I'm trying to figure out if you're checking the variable after a DDX, causing an empty edit control to set it to zero. What happens if you replace the code with this? float fFoo = ThreatStruct.cvf[0].fSlantRange; What is the value of fFoo after the assignment? /ravi Let's put "civil" back in "civilization" http://www.ravib.com ravib@ravib.com Re: var value can't be assigned jimNLX12-Sep-02 11:48 jimNLX 12-Sep-02 11:48  I tried that already and it doesn't set that either! It really is beyond me, logic, and reason. I've even deleted the box and put the code back in...Nada! Thanks for trying. Re: var value can't be assigned Ravi Bhavnani12-Sep-02 11:56 Ravi Bhavnani 12-Sep-02 11:56  Just for grins, do this and tell me what you see in the output window. TRACE ("fSlantRange = %f\n", ThreatStruct.cvf[0].fSlantRange); float fFoo = ThreatStruct.cvf[0].fSlantRange; TRACE ("fFoo = %f\n", fFoo); /ravi Let's put "civil" back in "civilization" http://www.ravib.com ravib@ravib.com Re: var value can't be assigned Tomasz Sowinski12-Sep-02 11:53 Tomasz Sowinski 12-Sep-02 11:53  'm_' prefix suggests that this is a member variable. Can you check 'this' pointer in the debugger? Does it point to reasonable location? Tomasz Sowinski -- http://www.shooltz.com To some its a six-pack, to me it's a support group Re: var value can't be assigned jimNLX12-Sep-02 12:08 jimNLX 12-Sep-02 12:08  m_mf2_rngcntdwn = ThreatStruct.cvf[0].fSlantRange; TRACE ("fSlantRange = %f\n", ThreatStruct.cvf[0].fSlantRange); float fFoo = ThreatStruct.cvf[0].fSlantRange; TRACE ("fFoo = %f\n", fFoo); ----------------------------------------------------- OUTPUT: fSlantRange = 0.000000 fFoo = 0.000000 -------------------------------------------------- on selecting ThreatStruct.cvf[0].fSlantRange in the debugger in shows 1.23400 in the mouse over text. Re: var value can't be assigned Tomasz Sowinski12-Sep-02 12:15 Tomasz Sowinski 12-Sep-02 12:15  If fSlantRange is float (not double), then you'll have to cast it to double before using TRACE. Tomasz Sowinski -- http://www.shooltz.com To some its a six-pack, to me it's a support group Re: var value can't be assigned jimNLX12-Sep-02 12:19 jimNLX 12-Sep-02 12:19  If fSlantRange is float (not double), then you'll have to cast it to double before using TRACE. Not sure I understand this, why would I cast a float to a double to display as a float in TRACE? Re: var value can't be assigned Tomasz Sowinski12-Sep-02 12:24 Tomasz Sowinski 12-Sep-02 12:24  Because %f needs double, not float. Tomasz Sowinski -- http://www.shooltz.com To some its a six-pack, to me it's a support group Re: var value can't be assigned jimNLX12-Sep-02 12:33 jimNLX 12-Sep-02 12:33  I did the cast and the value is still 0 Re: var value can't be assigned Ravi Bhavnani12-Sep-02 13:44 Ravi Bhavnani 12-Sep-02 13:44  Have you by chance redefined ThreatStruct within the function, thereby causing it to be zero although the *real* ThreatStruct variable contains 1.234? /ravi Let's put "civil" back in "civilization" http://www.ravib.com ravib@ravib.com Re: var value can't be assigned jimNLX13-Sep-02 3:29 jimNLX 13-Sep-02 3:29  I've only defined it in one place and extern it everywhere else. I also get a lot of other stuff out of it just before this problem area... This is very strange... Thanks for the help. Need help with flicker free drawing! Daniel Strigl12-Sep-02 9:44 Daniel Strigl 12-Sep-02 9:44  Hi! I have a little problem with a mfc application! I have a sdi application with a scrollable view (CScrollView), where I draw some things with gdi. So, to reduce flicker I draw the things first in a memory device and blit it than to the view. I have also overwritten the "OnEraseBkgnd(CDC* pDC)" funktion (to reduce flicker free drawing): BOOL CLmsView::OnEraseBkgnd(CDC* pDC) { // TODO: Add your message handler code here and/or call default return FALSE; // CScrollView::OnEraseBkgnd(pDC); } It works fine, but when I am open a dialog (like the Info Dialog of the app) and move the dialog on the view of the app, the view will not be repainted and so the moving dialog is working like a "rubber". That looks very terrible... what can I do??? (SORRY FOR MY BAD ENGLISH!!!) -- Nice greets, Daniel. Re: Need help with flicker free drawing! TyMatthews12-Sep-02 10:36 TyMatthews 12-Sep-02 10:36  What does your OnDraw() function look like? Ty "The significant problems we face cannot be solved at the same level of thinking we were at when we created them." -Albert Einstein Re: Need help with flicker free drawing! Daniel Strigl12-Sep-02 19:56 Daniel Strigl 12-Sep-02 19:56  Hi! I have fixed the problem... It was a bug in the flicker free drawing function... I only repainted the clip-region instead of the full view... so it works fine! Thanks for your answer!!! -- Nice greets, Daniel. I fixed the problem!!! Daniel Strigl12-Sep-02 19:55 Daniel Strigl 12-Sep-02 19:55  Hi! I have fixed the problem... It was a bug in the flicker free drawing function... I only repainted the clip-region instead of the full view... so it works fine! -- Nice greets, Daniel. Text Extent in CListCtrl (AUTOSIZE) JennyP12-Sep-02 9:36 JennyP 12-Sep-02 9:36  Hello, I'm trying to change my CListCtrl text for each line. With the following code, I've been able to do it successfully. However, when it comes time to AUTOSIZE (GetListCtrl().SetColumnWidth(col, LVSCW_AUTOSIZE_USEHEADER)), it seems to use the system default font to determine how wide to make each column. So to get the widths right, do I have to bite-the-bullet and calculate it all myself? Or is there a way to tell CListCtrl what type of text is in the columns? Thanks! JennyP ...else if ( CDDS_ITEMPREPAINT == pLVCD->nmcd.dwDrawStage ) { .... CFont newFont; newFont.CreateFont(15,0, 0, 0, FW_NORMAL, 0, 0, 0, 0, 0, 0, 0, 0, "Arial"); CDC* pListDC; pListDC = pListDC->FromHandle(pLVCD->nmcd.hdc); pListDC->SelectObject(&newFont); newFont.Detach(); newFont.DeleteObject(); pListDC->SaveDC(); How do i pass a function to a function that need a DWORD? Anonymous12-Sep-02 9:29 Anonymous 12-Sep-02 9:29  In the acmStreamOpen function i need to specify a function name, but the type is DWORD_PTR, and i get an error when i cast it to that type. MMRESULT acmStreamOpen( LPHACMSTREAM phas, HACMDRIVER had, LPWAVEFORMATEX pwfxSrc, LPWAVEFORMATEX pwfxDst, LPWAVEFILTER pwfltr, DWORD_PTR dwCallback, DWORD_PTR dwInstance, DWORD fdwOpen ); What do i do, is it something with function pointers? Thanks.

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