Re: Load MFC regular DLL failed - C / C++ / MFC Discussion Boards

machengzhi28-Jan-10 19:29

28-Jan-10 19:29

Yes. I use debug version DLL in my debug enviroment.I debug my code and found LoadLibrary always return NULL. I use the same compiler as the DLL.

Re: Load MFC regular DLL failed

KingsGambit28-Jan-10 19:34

KingsGambit

28-Jan-10 19:34

Can you try GetLastError() to see the cause of failure?

Re: Load MFC regular DLL failed

machengzhi28-Jan-10 19:38

machengzhi

28-Jan-10 19:38

I have use try-catch to catch exception, but no exception throw.

Re: Load MFC regular DLL failed

KingsGambit28-Jan-10 19:41

KingsGambit

28-Jan-10 19:41

You can include following code after your LoadLibrary() call to get the error code:

DWORD dwErr = GetLastError();

And check the dwErr value in Visual Studio Error Lookup tool which is available under 'Tools' menu.

Re: Load MFC regular DLL failed

machengzhi28-Jan-10 19:55

machengzhi

28-Jan-10 19:55

I try it. error no is 126, error openning file.

Re: Load MFC regular DLL failed

KingsGambit28-Jan-10 20:01

KingsGambit

28-Jan-10 20:01

It seems as you figured out, the depending DLL is missing. Can you check if everything works fine on Release version?

Re: Load MFC regular DLL failed

KingsGambit28-Jan-10 20:15

KingsGambit

28-Jan-10 20:15

Can you check if the following post helps?
http://social.msdn.microsoft.com/Forums/en-US/vcgeneral/thread/6d16ecce-f92b-4c53-a45b-40119c4566a6[^]

Re: Load MFC regular DLL failed

machengzhi3-Feb-10 20:36

machengzhi

3-Feb-10 20:36

Dear Rejeesh.T.S, thanks for your help, I have resovled my problem. I reviewed many articles about MSVCR80D.DLL and MSJAVA.DLL lost. These DLLs will be installed in system32 folder if you install VS2005. When I firstly installed VS2008 and then installed VS2005 sencondly, these DLLs would not be installed.So problem appeared. If you installed these IDE in adverse order, problem will not appeared. I copy msvcr80D.dll, msvcm80D.dll and msjava.dll in the system32 folder, problem disappeared. Thank you again.

Re: Load MFC regular DLL failed

norish29-Jan-10 3:26

norish

29-Jan-10 3:26

Do you have the msjava.dll in your pc?
Nowadays, Microsoft dose not deploy that dll when installing the os, I think.
Check your pc configuration, please.

Re: Load MFC regular DLL failed

machengzhi2-Feb-10 15:27

machengzhi

2-Feb-10 15:27

Yes，there isn't MSJAVA.DLL in my PC. I place MSVCR80D.DLL in the folder where the target DLL exist, dependens report error opening file(MSJAVA.DLL). How can I resolved this problem when using VS2005.My DLL can't be load both in Release and in Debug.

Hardcoded CString file path

al250028-Jan-10 9:28

al2500

28-Jan-10 9:28

Hi all,

Just trying to hardcode a file path into a CString variable but result ignores backslash (I believe it may be interpreted as control character?).

e.x.

CString Path;

Path = "..\dir1\dir2\filename.ext";

result for path is "..dir1dir2filename.ext"

Also, another nagging string issue I have never understood is a compile error I get when I try to concatenate string literals -

Path = "abcd" + "abcd"; //causes a compile error, "cannot add 2 pointers

My compiler (VS 2005) is set to use Multi-Byte Character Set.

I once tried to research unicode v.s. Multi-Byte Character Set and I could not make heads or tails of the significance.

Thanks for any tips.

Re: Hardcoded CString file path

CPallini28-Jan-10 9:35

CPallini

28-Jan-10 9:35

al2500 wrote:
Path = "..\dir1\dir2\filename.ext";

'\' must be escaped (repeated since it is the escape character) in a string literal, change to

Path = "..\\dir1\\dir2\\filename.ext";

al2500 wrote:
Path = "abcd" + "abcd";

'+' is not the concatenation operator for string literals, you should change it to:

Path = "abcd" "abcd";

Path = "abcd";
Path += "abcd";

Path = CString("abcd") + CString("abcd");

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: Hardcoded CString file path

Richard MacCutchan28-Jan-10 10:13

Richard MacCutchan

28-Jan-10 10:13

CPallini wrote:
Path = "abcd";
Path += "abcd";

I think not.

MVP 2010 - are they mad?

Re: Hardcoded CString file path

CPallini28-Jan-10 10:35

CPallini

28-Jan-10 10:35

Well, you should ask MS to change the documentation [^], [^] and, above all, persuade the compiler of ... Roll eyes | :rolleyes:

Re: Hardcoded CString file path

Richard MacCutchan28-Jan-10 11:23

Richard MacCutchan

28-Jan-10 11:23

Apologies, you are, or should be, right. I really need to stay away from MFC questions.

MVP 2010 - are they mad?

Re: Hardcoded CString file path

al250028-Jan-10 11:31

al2500

28-Jan-10 11:31

Thanks guys,

I also realized that hardcoding a path(even relative) is stupid and in fact I could not get it to work. I found the following superior method that I had used elsewhere-

char acPath[256];
        if ( GetModuleFileName( NULL, acPath, 256 ) != 0) {
            // guaranteed file name of at least one character after path
            * ( strrchr( acPath, '\\' ) + 1 ) = '\0';
            //AfxMessageBox( acPath );   // Use it
        }

Re: Hardcoded CString file path

Richard MacCutchan28-Jan-10 10:18

Richard MacCutchan

28-Jan-10 10:18

al2500 wrote:
I once tried to research unicode v.s. Multi-Byte Character Set and I could not make heads or tails of the significance.

Unicode is usually a 16-bit (sometimes 32-bit) encoding of a character set. Multi-byte character sets (e.g. UTF-8) are encodings where each character is represented by one or more bytes. In each character the left most bit(s) of the first byte indicate how many bytes make up each character. In the ASCII set of characters in the range 0x00 to 0x7F each character is one byte long. There is some useful (and well explained) information here[^].

MVP 2010 - are they mad?

error C2679: binary '>>' : no operator found

mlchavez28-Jan-10 8:52

mlchavez

28-Jan-10 8:52

Hi:

I am migrating from VS 6.0 to VS 2008 and I am stuck on this error.

error C2679: binary '>>' : no operator found which takes a right-hand operand of type 'const char [13]' (or there is no acceptable conversion)

It is occurring here:
istream & operator>>(istream &stream,IOwnship &object)
{
//## begin IOwnship::operator>>%.body preserve=yes
char tempStr[80]={0};
UINT16 temp16;

stream >> (ISimObj&)object;

int i;
for( i=0; i<IOwnship::NUM_EXPENDABLE_SLOTS; ++i){
stream >> object.m_expCount[i] >> temp16;
object.m_expType[i] = (ExpendableType)temp16;
}

stream >> temp16; object.m_fuelType = (FuelType)temp16;

for(i=0; i<NUM_FUEL_TANK_TYPES; ++i){
stream >> object.m_fuelQty[i];
}

UINT32 malfID;
UINT16 malfStatus;
UINT16 moreMalfs;
stream >> "Malfunctions";
for(stream >> moreMalfs; moreMalfs; stream >> moreMalfs){
stream >> malfID >> malfStatus;
object.m_malfStatusMap[malfID] = MalfStatusActType(malfStatus);
}

I have included:
#include <iostream>
using namespace std;

This works fine in VS 6.0.. any help would be greatly appreciated

Re: error C2679: binary '>>' : no operator found

Richard MacCutchan28-Jan-10 9:11

Richard MacCutchan

28-Jan-10 9:11

mlchavez wrote:
stream >> "Malfunctions";

You are trying to read from stream into a constant, I don't think this will work; and even if it did it would serve no purpose.

MVP 2010 - are they mad?

Re: error C2679: binary '>>' : no operator found

mlchavez28-Jan-10 9:39

mlchavez

28-Jan-10 9:39

thank you for the speedy reply.

I really appreciate the help Smile | :)

Re: error C2679: binary '>>' : no operator found

Richard MacCutchan28-Jan-10 9:46

Richard MacCutchan

28-Jan-10 9:46

I hope it helps to solve your problem.

MVP 2010 - are they mad?

Re: error C2679: binary '>>' : no operator found

CODEPC28-Jan-10 10:18

CODEPC

28-Jan-10 10:18

mlchavez wrote:
stream >> "Malfunctions";

Are you sure this will work with VC 6.0?

playing .wav files using double buffering approach

Danzy8328-Jan-10 8:45

Danzy83

28-Jan-10 8:45

I am programming a console application that plays .wav files. I have set the members of the WAVEFORMATEX to the values of the read file. As a try, I set the lpData member of the WAVEHDR member to the buffer where the file was read into and the dwBufferLength to the size of the file. I have also prepared the WAVEHDR structure. This plays the file when I call the Sleep function for some seconds (Not the best approach) after calling waveOutWrite. I have read that files should be played using double buffering approach but I don't know how this is implemented. I used a callback function in the waveOutWrite function and I am also able to trap WOM_DONE and WOM_OPEN messages.

Please I need help on how this double buffering sheme is implemented. I have read that when one buffer is being sent, the other is being prepared but I don't know how to do this. Some tutorials may help to get the idea.

Please help me.

Re: playing .wav files using double buffering approach

enhzflep29-Jan-10 20:29

enhzflep

29-Jan-10 20:29

http://www.planet-source-code.com/vb/scripts/ShowCode.asp?txtCodeId=4422&lngWId=3

Using Google Map in MFC application?

CODEPC28-Jan-10 7:22

CODEPC

28-Jan-10 7:22

Hi
Is it possible to use Google Map in a MFC application? I want to read in the roadway map (traffic network) data.

Is there a sample for it?

Thanks,

Zhen

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