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Hello I am using this code in my dll:

FUNCTION void Testit( void )
{
	_Dot =  (void(*)  (int,int)) GetProcAddress( g_pGlob->g_Basic2D, "DOT%LL%?Dot@@YAXHH@Z%X,Y");
	_Dot(50,50);
}

But I get a memory error in pro, Can anyone see what's wrong here..?
Many thanks, Eddie

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IanG

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Posted: 13th Aug 2005 16:53

First of all have you loaded the dll?

second of all can you do it like that using (void(*) (int,int)) - i've never seen it done like that before, i usually do it like this

HANDLE MyDLL = LoadLibrary("MyDLL.dll");
typedef int (*HelloFnPtr)(int);
HelloFnPtr Hello;
Hello = (HelloFnPtr)GetProcAddress("Hello");
int x = Hello(1);
FreeLibrary(MyDLL);

but of course you are using the header, so i'm not sure how you would do it

what memory error are you getting?

amd athlon xp 2600+,1280mb,FX 5200 128mb,200gb,xp pro sp2

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Eddie B

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Posted: 13th Aug 2005 17:13 Edited at: 13th Aug 2005 17:17

The instruction at 0x0000000 could not be read at 0x00000000 or something like that.

My Hole code:

#include "stdafx.h"
#include "globstruct.h"
#include <stdio.h>
#include <stdlib.h>
#include <d3d9.h>
#include <math.h>

GlobStruct* g_pGlob = NULL;

BOOL APIENTRY DllMain( HANDLE hModule,
                       DWORD  ul_reason_for_call,
                       LPVOID lpReserved
					 )
{

    return TRUE;
}


#define FUNCTION __declspec ( dllexport )

HINSTANCE Core;

void (*_Dot)( int,int ); 


FUNCTION void ReceiveCoreDataPtr (LPVOID _Core)
{

	g_pGlob=(GlobStruct*)_Core;
	Core = GetModuleHandle("DBProCore.dll");

}

#ifdef __cplusplus
extern "C" {
#endif
    
FUNCTION void Testit( void )
{
	_Dot =  (void(*) (int,int)) GetProcAddress( g_pGlob->g_Basic2D, "DOT%LL%?Dot@@YAXHH@Z%X,Y");
	_Dot(50,50);
}

#ifdef __cplusplus
}
#endif

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OSX Using Happy Dude

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Posted: 13th Aug 2005 19:29 Edited at: 13th Aug 2005 20:17

I hope _DOT is defined like :

void (PASCAL *_DOT)(int x,int y);

You should initialise it like :

(FARPROC &) _DOT=GetProcAddress(g_pGlob->g_Basic2D, "?Dot@@YAXHH@Z");

Make sure g_pGlob->g_Basic2D is a correct handle

You should then call it like :

(_DOT)(x,y);

AtomZ - its got an A. Its got a Z. Now its just needs U
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Web Site:http://www.nicholaskingsley.co.uk

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empty

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Posted: 13th Aug 2005 20:11

The function name is ?Dot@@YAXHH@Z%X,Y.
DOT%LL%?Dot@@YAXHH@Z%X,Y is the string table entry.

Play Nice! Play Basic! Version 1.08

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Eddie B

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Posted: 13th Aug 2005 20:51

#include "stdafx.h"
#include "globstruct.h"
#include <stdio.h>
#include <stdlib.h>
#include <d3d9.h>
#include <math.h>

GlobStruct* g_pGlob = NULL;

BOOL APIENTRY DllMain( HANDLE hModule,
                       DWORD  ul_reason_for_call,
                       LPVOID lpReserved
					 )
{

return TRUE;
}

#define FUNCTION __declspec ( dllexport )

HINSTANCE Core;

void (PASCAL *_DOT)(int x,int y);

FUNCTION void ReceiveCoreDataPtr (LPVOID _Core)
{

g_pGlob=(GlobStruct*)_Core;
	Core = GetModuleHandle("DBProCore.dll");

}

#ifdef __cplusplus
extern "C" {
#endif
    
FUNCTION DWORD dbpstring()
{
	
	   LPSTR pstring = "Cooool";
       LPSTR pret=NULL;
       DWORD dwSize=strlen((LPSTR)pstring );
       
       g_pGlob->CreateDeleteString ( (DWORD*)&pret, dwSize+1 );
       strcpy(pret, (LPSTR)pstring);
        
       return (DWORD) pret;
         
}

FUNCTION void Testit()
{
	(FARPROC &) _DOT=GetProcAddress(g_pGlob->g_Basic2D, "?Dot@@YAXHH@Z");
	(_DOT)(10,10);
}

#ifdef __cplusplus
}
#endif

#include "stdafx.h"
#include "globstruct.h"
#include <stdio.h>
#include <stdlib.h>
#include <d3d9.h>
#include <math.h>

GlobStruct* g_pGlob = NULL;

BOOL APIENTRY DllMain( HANDLE hModule,
                       DWORD  ul_reason_for_call,
                       LPVOID lpReserved
					 )
{

    return TRUE;
}


#define FUNCTION __declspec ( dllexport )

HINSTANCE Core;

void (PASCAL *_DOT)(int x,int y);

FUNCTION void ReceiveCoreDataPtr (LPVOID _Core)
{

	g_pGlob=(GlobStruct*)_Core;
	Core = GetModuleHandle("DBProCore.dll");

}

#ifdef __cplusplus
extern "C" {
#endif
    
FUNCTION DWORD dbpstring()
{
	
	   LPSTR pstring = "Cooool";
       LPSTR pret=NULL;
       DWORD dwSize=strlen((LPSTR)pstring );
       
       g_pGlob->CreateDeleteString ( (DWORD*)&pret, dwSize+1 );
       strcpy(pret, (LPSTR)pstring);
        
       return (DWORD) pret;
         
}

FUNCTION void Testit()
{
	(FARPROC &) _DOT=GetProcAddress(g_pGlob->g_Basic2D, "?Dot@@YAXHH@Z");
	(_DOT)(10,10);
}

#ifdef __cplusplus
}
#endif

There is my new code, Still doesnt work..

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OSX Using Happy Dude

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Posted: 14th Aug 2005 02:15

Is ReceiveCoreDataPtr actually being called ?

AtomZ - its got an A. Its got a Z. Now its just needs U
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Eddie B

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Posted: 14th Aug 2005 14:06 Edited at: 14th Aug 2005 14:09

ah ok... But how do I call it.. What argument should LPVOID _Core be? Something like ReceiveCoreDataPtr("Path/DBProBasic2DDebug.dll");

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OSX Using Happy Dude

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Posted: 14th Aug 2005 14:35

ReceiveCoreDataPtr is called by DBPro itself, if, I remember correctly the constructor and destructor are present.

AtomZ - its got an A. Its got a Z. Now its just needs U
Blog:http://spaces.msn.com/members/BouncyBrick/
Web Site:http://www.nicholaskingsley.co.uk

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Eddie B

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Posted: 14th Aug 2005 14:53

Line this:

 MYCOMMAND void Constructor ( void )
 {
 // Create memory here
 }
 MYCOMMAND void Destructor ( void )
 {
 // Free memory here
 }

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Eddie B

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Posted: 14th Aug 2005 15:04

My new Code:

Main.cpp:

#include "stdafx.h"
#include <stdio.h>
#include "main.h"
#include <stdlib.h>
#include <d3d9.h>
#include <math.h>

GlobStruct* g_pGlob = NULL;

BOOL APIENTRY DllMain( HANDLE hModule,
                       DWORD  ul_reason_for_call,
                       LPVOID lpReserved
					 )
{

    return TRUE;
}


#define MYCOMMAND __declspec ( dllexport )

HINSTANCE Core;

void (PASCAL *_DOT)(int x,int y);

MYCOMMAND void ReceiveCoreDataPtr (LPVOID _Core)
{

	g_pGlob=(GlobStruct*)_Core;
	Core = GetModuleHandle("DBProCore.dll");

}

#ifdef __cplusplus
extern "C" {
#endif


MYCOMMAND void Testit()
{

	(FARPROC &) _DOT=GetProcAddress(g_pGlob->g_Basic2D, "?Dot@@YAXHH@Z%X,Y");
	(_DOT)(10,10);
}



#ifdef __cplusplus
}
#endif

main.h:

//
// Header File
//

// Common Includes
#include "globstruct.h"
#include "windows.h"

// Define macro
#define MYCOMMAND __declspec ( dllexport )

// Constructor Functions (optional)
MYCOMMAND void Constructor ( void );
MYCOMMAND void Destructor ( void );
MYCOMMAND void ReceiveCoreDataPtr ( LPVOID pCore );

// Do not decorate DLL-function-names
extern "C"
{
	// My Commands and Functions
	MYCOMMAND void Testit();
}

It still does not work.

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Ianhfar

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Posted: 15th Aug 2005 13:35