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Your code that draws the bitmap needs to take into account the current scroll position when displaying the bitmap:
int x = GetScrollPos(SB_HORX);
int y = GetScrollPos(SB_VERT);
If you treat these values as -ve destination plot position when drawing the bitmap, it should show correctly.
Roger Allen
Sonork 100.10016
Were you different as a kid? Did you ever say "Ooohhh, shiny red" even once? - Paul Watson 11-February-2003
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I am prompted with what type of project I want to start, I pick MFC because I want to work with forms. But being a newbie, it took me 3 days to figure that out!
I still dont know what MFC stand for, or why I have to choose it to use forms. How does this differ from Application? I assume that I can still use forms in Application mode, I just have to go through the process of creating them?
Can anyone educate me, or point me to a dummie's link that would explain this?
Thanks,
Andrew
=================================
New to VC++ programming, working hard to learn. 
Programming platform: eVC++ 3.0 for WinCE/PPC
=================================
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MFC stands for Microsoft Foundation Class. I don't know enough about the different types of projects to try to explain them, but there are many excellent articles on CP that explain a lot of this stuff. Nothing will beat a good intro book on VC++ though. Hope you get it all figured out.
Brad Jennings
"if the golden arches shut shop, where else are the VB people going to get work." - Colin Davies
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Ive got Microsoft Press:
Visual C++ .NET Step by Step
Its pretty good, but Im not digesting it all. 
Ive also got two older books, some of the stuff applies, much of it doesnt:
Sams: Moving from QBasic to C
Sams: Absolute Beginner's Guide to C (2ed Ed.)
Dont know yet, if the books help, or hinder... 
Andrew
=================================
New to VC++ programming, working hard to learn.
Programming platform: eVC++ 3.0 for WinCE/PPC
=================================
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If you are looking for some C and C++ material, here[^] is a great website. This is the class website for the Intro to C++ class I took a few years ago. His reference note and lecture notes are excellent IMO and I still use them from time to time.
Brad Jennings
"if the golden arches shut shop, where else are the VB people going to get work." - Colin Davies
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Hello,
I can not use CAtlMap when the template parameter is CString or other similar user-defined type in a MFC project, like CAtlMap<CString,CString>. Every time I get the C2440 error(cannot convert from 'type1' to 'type2'). And I found the "afx.h" caused the error.
Has someone met this problem? I must use ATL collection classes in MFC project, How can I do?
Thanks.
Kerry Chou
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hello experts,
is there any method for manipulating SYSTEMTIME ? I want to be able to add hours/seconds/minutes/days/month/year to a SYSTEMTIME. just wondering if there are some prewritten apis for this purpose?
thanks
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Okay, Ive got the other part of my problem fixed, and it appears to be working... That is, fetching text values from Edit Boxes and converting them to Long, then adding them for the sum.
Now, I want to convert the sum variable back to text so it can be used in a message box.
Heres what I have, code snippit:
===========================================================
// Fetch the text from Edit Boxes 1 and 2, and assign them
// to variables Number1 and 2.
GetDlgItemText(IDC_EDIT1, Number1);
GetDlgItemText(IDC_EDIT2, Number2);
// Initilize Long variables for number 1 and 2,
// and the resulting sum, Answer.
long N1;
long N2;
long Ans;
// Convert the text Number1 to Long N1,
// and 2 respectivly
N1 = wcstol(Number1, NULL, 10);
N2 = wcstol(Number2, NULL, 10);
// Add for the sum
Ans = N1 + N2;
// * Error compiling here.. *
// Objective: convert the Long Ans to the
// string AnsSum for printing in message box, etc..
CString AnsSum = atol( Ans );
// Build the text string TmpTxt to be used in message box
CString TmpTxt = "The numbers are " + Number1 + " and " + Number2 + " and the sum is " + _T(AnsSum);
// Finally, display the message box
MessageBox(TmpTxt, _T("Your answer"), MB_ICONINFORMATION | MB_OK);
===========================================================
Im getting these errors:
error C2664: 'atol' : cannot convert parameter 1 from 'long' to 'const char *'
error C2065: 'LAnsSum' : undeclared identifier
error C2666: '+' : 5 overloads have similar conversions
As you may recall from my previou post, this is a super newbie project Im working on, fetch two text vals from two edit boxes, convert them to Long, add them for the sum, convert the Long sum to Text and display the answer in a message box.
This project is introducing me to several various 'C++' structures and getting me used to the IDE. I am making progress, but I feel like a total idiot because I cant develop this simple app without having to ask questions. 
I come from years of app dev with VB, so this is quite a change for me.
If you reply, please address me as the idiot I am so I understand what I am doing wrong, and what I need to do, and if you feel fancy, the why... 
Thanks,
Andrew
New to VC++ programming, working hard to learn.
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atol() converts an ANSI string to long integer. The function you want is _itoa()(ANSI) or _itow()(UNICODE) or _itot(ANSI and UNICODE) which converts a long integer to a string.
From your previous post I am lead to believe you are using a UNICODE enviroment, so you should either use UNICODE functions (have a 'w' in them instead of an 'a') or use the TCHAR macros.
CPUA 0x5041
Sonork 100.11743 Chicken Little
"You're obviously a superstar." - Christian Graus about me - 12 Feb '03
Within you lies the power for good - Use it!
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Same problem as before, you're using an ANSI function (atol) and passing it a Unicode string (CString has a converter to LPCWSTR). Check out The Complete Guide to C++ Strings, Part I - Win32 Character Encodings[^] -- it explains the different string types and functions. You absolutely need to know this for Win32 programming. Just remember that in WinCE, everything is Unicode.
--Mike--
The Internet is a place where absolutely nothing happens.
-- Strong Bad
1ClickPicGrabber - Grab & organize pictures from your favorite web pages, with 1 click!
My really out-of-date homepage
Sonork-100.19012 Acid_Helm
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The link to strings has some great information in it, i think, Im too stupid at this point to understand most of what Im reading... Give me some time, Ill figure it out. I had little or no help learning VB, so this is like deja-vu.
New to VC++ programming, working hard to learn.
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PocketBlast wrote:
error C2065: 'LAnsSum' : undeclared identifier
Hey kewl , I was wondering where you had an Identifier named 'LAnsSum' until I saw that you wrapped 'AnsSum' in a _T() macro. The _T() macro is used to declare a literal string in your code as either an ANSI or UNICODE string. Basicly what it does is use the preprocessor to prepend a 'L' in front of what ever text you run through it.
#ifdef _UNICODE
#define _T(str) L##str
#else
#define _T(str) str
#endif
CPUA 0x5041
Sonork 100.11743 Chicken Little
"You're obviously a superstar." - Christian Graus about me - 12 Feb '03
Within you lies the power for good - Use it!
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Okay, now I have:
Ans = N1 + N2;
CString AnsSum;
_itow (Ans, AnsSum, 10);
And getting compiler error:
'_itow' : cannot convert parameter 2 from 'class CString' to 'unsigned short *'
Im still lost... Any suggestions?
Andrew
New to VC++ programming, working hard to learn.
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This should convert an integer to a CString:
AnsSum.Format("%d", Ans);
Brad Jennings
"if the golden arches shut shop, where else are the VB people going to get work." - Colin Davies
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Tried:
===========================================================
CString AnsSum;
// _itow (Ans, AnsSum, 10);
AnsSum.Format("%d", Ans);
===========================================================
Compiler/Linker gave:
: error C2664: 'void __cdecl CString::Format(const unsigned short *,...)' : cannot convert parameter 1 from 'char [3]' to 'const unsigned short *'
Guys, Im *very* sorry, Im so new to this I dont even understand the error message.
Thanks for working with me, I wouldnt blame you all if I got banned from this forum!
Andrew
=================================
New to VC++ programming, working hard to learn.
Programming platform: eVC++ 3.0 for WinCE/PPC
=================================
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Hmm, CString must be a little different between compilers.
Try:
CString AnsSum;<br />
char temp[33];<br />
ltoa(i, temp, 10);<br />
AnsSum = temp;
This works without any headers in VC++ 6.0 but if it doesn't know what ltoa is try [edit] including stdlib.h [/edit]. Don't feel bad about asking questions, simple or complex, we've all got to start somewhere.
Brad Jennings
"if the golden arches shut shop, where else are the VB people going to get work." - Colin Davies
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PocketBlast wrote:
AnsSum.Format("%d", Ans);
#include <tchar.h><br />
AnsSum.Format(_T("%d"), Ans);
I assume you are using UNICODE the error message is saying that the "%d" is in the wrong format for unicode it must be an unsigned short, the _T deals with it
If I have seen further it is by standing on the shoulders of Giants. - Isaac Newton 1676
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AnsSum.Format(_T("%d"), Ans);
Holy cow Batman! That worked!
Though, I didnt include #include <tchar.h>, may be default part of the IDE for WinCE, dont know..
Yes, I have recently been educated that I am programming for a Unicode environment, the PocketPC IE: WinCE. Though I have not a clue what that means at this point, Ill figure that out later. Now I gotta learn ANSI formats so I can write for the X86 platform! UGGGG!
Now I know why VB is so appealing to newbies! HAHA!
Thanks much for the on target help!
Andrew
=================================
New to VC++ programming, working hard to learn.
Programming platform: eVC++ 3.0 for WinCE/PPC
=================================
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AnsSum.Format(_T("%d"), Ans);
Cool, it looks like I was on the right track when I was trying to help, just haven't dealt with UNICODE before. I'll have to look into the tchar thing.
Brad Jennings
"if the golden arches shut shop, where else are the VB people going to get work." - Colin Davies
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I used the _T macro, the "correct" way would be to use L("%d")
"Using Generic-Text Mappings"
"Data Type Mappings"
i.e look for _T in the index
If I have seen further it is by standing on the shoulders of Giants. - Isaac Newton 1676
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hey, I was looking at the tutorial to show fonts in a combo box(http://www.codeproject.com/combobox/fontcombo.asp?forumid=3520&app=50#xxxx). I'm trying to implement it into my program but i'm having trouble.
Keep in mind I'm new to MFC.
It says: "Add a member of type CFontPreviewCombo to your dialog and attach it to your control."
How do I do this? I'm not sure what the member part means. Thanks for any help.
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hello experts,
I created a TimerThread class that derive from CWinThread,
class TimerThread: public CWinThread
{
public:
TimerThread();
SYSTEMTIME* start_time;
SYSTEMTIME* end_time;
VOID SetStartTime(SYSTEMTIME*);
VOID CopyTime(SYSTEMTIME*, SYSTEMTIME*);
};
and I have a global TimeThread* timerThread;
timerThread=AfxBeginThread(RUNTIME_CLASS(TimerThread));
I got the following error, i don't really understand it...
thanks for the help.
C:\sampleC++\dlg\dlgDlg.cpp(130) : error C2039: 'classTimerThread' : is not a member of 'TimerThread'
c:\samplec++\dlg\timerthread.h(2) : see declaration of 'TimerThread'
C:\sampleC++\dlg\dlgDlg.cpp(130) : error C2065: 'classTimerThread' : undeclared identifier
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In your code "classTimerThread" is one world. What is it and where is it declared?
Kuphryn
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sorry the error was thrown at this line:
timerThread=AfxBeginThread(RUNTIME_CLASS(TimerThread));
so it seems RUNTIME_CLASS() returned a classTimerThread or something.. I don't understand..
thanks for the help
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