Hi!

Im a newbie to C++ and have a problem compiling with the DMC. I included a header-file (.h) into an very simple cpp-programm.

In this file is e.g. a line like this:

int WINAPI CasioIO_RespondToReceive(HCASIOIO handle, BYTE rows, BYTE columns,
double * values);

DMC reports errors cause of an missing "," and errors cause the "*", but the
code should be correct.
Have i to change the lines for DMC? Or is this header-file-line wrong?

greetings
davidek

davidek skrev:
> Hi!
> 
> Im a newbie to C++ and have a problem compiling with the DMC.
> I included a header-file (.h) into an very simple cpp-programm.
> 
> In this file is e.g. a line like this:
> 
> int WINAPI CasioIO_RespondToReceive(HCASIOIO handle, BYTE rows, BYTE columns,
> double * values);
> 
> DMC reports errors cause of an missing "," and errors cause the "*", but the
> code should be correct.
> Have i to change the lines for DMC? Or is this header-file-line wrong?

Do you have a decleration of HCASIOIO?
I don't think it is a standard one.

-- 
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http://damb.dk
But it's mine - Bertel

The complete Header-File, which was delivered with an CasioIO.dll, is the
following: (casioio.h)

#define HCASIOIO	int

#define IOTYPE_CFX		1

#define ERR_NOTSUPPORTED	2
#define ERR_COMMPORT		4

#define TYPE_VALUE		1
#define TYPE_MATRIX		2
#define TYPE_LIST		3


typedef void (*CASIOIO_EVENT)();

int WINAPI CasioIO_Uninit();
int WINAPI CasioIO_RespondToReceive(HCASIOIO handle, BYTE rows, BYTE columns,
double * values);
int WINAPI CasioIO_AfterReceive(HCASIOIO handle, BYTE * type, BYTE * name);
int WINAPI CasioIO_AfterSend(HCASIOIO handle, BYTE * type, BYTE * name, BYTE *
rows, BYTE * columns, double * values);
int WINAPI CasioIO_Init(BYTE comport, int iotype);
HCASIOIO WINAPI CasioIO_Open(int authorID, int productID, CASIOIO_EVENT sendproc,
CASIOIO_EVENT receiveproc);
int WINAPI CasioIO_Close(HCASIOIO handle);

davidek skrev:
> The complete Header-File, which was delivered with an CasioIO.dll, is the
> following: (casioio.h)
> 

[snip code]

Do you include windows.h before casioio.h ?
If not, try it.

Do you have a .lib file for the dll?

-- 
Just another homepage:
http://damb.dk
But it's mine - Bertel

Yes, i included windows.h before casioio.h.

Yes, i have a .lib file too. (It was delivered with the .dll too.)


davidek

davidek skrev:
> Yes, i included windows.h before casioio.h.
> 
> Yes, i have a .lib file too. (It was delivered with the .dll too.)

Strange.

I wrote this:

#include <windows.h>
#include "casioio.h"
HCASIOIO Handle;
void SendFunc()
{
}
void RecvFunc()
{
   double X[] = {1, 2};
   CasioIO_RespondToReceive(Handle, 2, 3, X);
}
int main()
{
   CasioIO_Init(1, 0);
   Handle = CasioIO_Open(123, 321, SendFunc, RecvFunc);
}

It compiles without problems.
casioio.h is a file with the content you posted.

Can you post a complete example that show the problem?
Can I download casioio.h/.dll/.lib ?

-- 
Just another homepage:
http://damb.dk
But it's mine - Bertel

Hi!

The background to my problem: I started to learn java-programming. Now i want to call functions of this dll out of java. For that i use the JNI (Java Native Interface), which allows to use DLLs in java.

I have to call the CasioIO.dll out of an new DLL, that i try to create (Wrapper). But i simply dont get the DLLs functions in the cpp-programm.

At he current state the Optlink reports "Error 42: Symbol Undefined" about the CasioIO-methods.

Here is a link to the CasioIO-download: http://users.pandora.be/gp/casio/casioio/casioio_sdk.zip

My files are in the attachment.

Greetings
davidek

davidek skrev:
> Hi!
> 
> The background to my problem: I started to learn java-programming. Now i want to
> call functions of this dll out of java. For that i use the JNI (Java Native
> Interface), which allows to use DLLs in java.
> 
> I have to call the CasioIO.dll out of an new DLL, that i try to create (Wrapper).
> But i simply dont get the DLLs functions in the cpp-programm.
> 
> At he current state the Optlink reports "Error 42: Symbol Undefined" about the
> CasioIO-methods.

You could do:
#include <windows.h>
#include <iostream>
#include "../SDK/vc/casioio.h"
#include "jni_test.h" //This includes the JNI. It is an header file created by a java-sdk-tool.

typedef int WINAPI (*CasioIO_UninitPtrT)();
CasioIO_UninitPtrT CasioIO_UninitPtr;
typedef int WINAPI (* CasioIO_InitPtrT)(BYTE comport, int iotype);
CasioIO_InitPtrT CasioIO_InitPtr;


JNIEXPORT jint JNICALL Java_jni_1test_Uninit(JNIEnv *env, jclass)
{
   return CasioIO_UninitPtr();
}

JNIEXPORT jint JNICALL Java_jni_1test_Init(JNIEnv *env, jclass cl, jshort comport, jint iotype)
{
   return CasioIO_InitPtr(comport, iotype);
}

void InitPointers()
{
   HINSTANCE Library = LoadLibrary("CasioIO.dll");
   CasioIO_UninitPtr = (CasioIO_UninitPtrT )GetProcAddress(Library, "CasioIO_Uninit");
   if(!CasioIO_UninitPtr)
   {
      std::cout << "Failed to find CasioIO_Uninit" << std::endl;
   }

   CasioIO_InitPtr = (CasioIO_InitPtrT )GetProcAddress(Library, "CasioIO_Init");
   if(!CasioIO_InitPtr)
   {
      std::cout << "Failed to find CasioIO_Init" << std::endl;
   }
}

__declspec(dllexport) BOOL APIENTRY DllMain(HANDLE hModule, DWORD ul_reason_for_call, LPVOID lpReserved)
{
   switch (ul_reason_for_call)
   {
   case DLL_PROCESS_ATTACH:
      InitPointers();
      break;
   case DLL_THREAD_ATTACH:
   case DLL_THREAD_DETACH:
   case DLL_PROCESS_DETACH:
      break;
   }
   return TRUE;
}

The above code compiles and creates a jni_test.DLL with this command line:
dmc -I\j2sdk1.4.2_10\include -I\j2sdk1.4.2_10\include\win32 -mn -WD jni_test.cpp kernel32.lib

You need to do something else than stc::cout << "..." in case of errors.

-- 
Just another homepage:
http://damb.dk
But it's mine - Bertel

Hi!

Thank you very much! That solution works fine! I got an value back from the DLL-Method to the Java-App!

Thanks for the answers you wrote and for the effort!

Greetings
davidek