Importing C++ DLL to VB - 2d array from vb to c++

[MoMad]

I made a dll in C++, the dll was originally made in vb, but i just did a basic conversion to c++ for speed and performance reasons. But for some reason, vb doesnt understand the dll. Any help would be appriciated, thanks.

--see the last post.
-MoMad

[MoMad]

Here's the problem:

I have a dll made in C++. With 2 functions and a variable, but i want to use these functions inside vb.

// The following ifdef block is the standard way of creating macros which make exporting 
// from a DLL simpler. All files within this DLL are compiled with the SPECIALEFFECTS_EXPORTS
// symbol defined on the command line. this symbol should not be defined on any project
// that uses this DLL. This way any other project whose source files include this file see 
// SPECIALEFFECTS_API functions as being imported from a DLL, wheras this DLL sees symbols
// defined with this macro as being exported.
#ifdef SPECIALEFFECTS_EXPORTS
#define SPECIALEFFECTS_API __declspec(dllexport)
#else
#define SPECIALEFFECTS_API __declspec(dllimport)
#endif

#define MAX 1024

// This class is exported from the SpecialEffects.dll
// [variables]
extern SPECIALEFFECTS_API BYTE LookupTable[18][256][256];
extern SPECIALEFFECTS_API BOOL initialized;

// [functions]
extern SPECIALEFFECTS_API void doEffect(int effect, long src, long dest);
// public declare sub InitEffects Lib "SpecialEffects" ()
extern SPECIALEFFECTS_API void InitEffects(void);
// public declare sub SpecialBltArray Lib "SpecialEffects" (SrcArray() As Byte, _
// DestArray() As Byte, ByVal dX as Long, ByVal dY as Long, _
// SrcX As Long, SrcY As Long, SrcWid As Long, SrcHgt As Long, LookupTableIndex As Long);
extern SPECIALEFFECTS_API void SpecialBltArray(BYTE * SrcArray[], BYTE * DestArray[], long dX, long dY, 
	long SrcX, long SrcY, long SrcWid, long SrcHgt, 
	long LookupTableIndex);

But i seem to be missing something to make it compatible with vb because vb is giving me "DLL entry point Not found" when i call these functiions.

Please help.

-MoMad

[MoMad]

Ok. I got the DLL made, but now its giving me Illigal Operation Performed - Close.

So please anyone, help.

I tried everything, how do you go about debugging it???? All i see is machine code whenever i try debugging! Look:

?SpecialBltArray@@YGXQAY0EAA@E0JJJJJJJ@Z:
100010A0 E8 65 FF FF FF       call        @ILT+5(InitEffects) (1000100a)
100010A5 8B 44 24 1C          mov         eax,dword ptr [esp+1Ch]
100010A9 85 C0                test        eax,eax
100010AB 0F 8E 8B 00 00 00    jle         SpecialBltArray+9Ch (1000113c)
100010B1 8B 4C 24 0C          mov         ecx,dword ptr [esp+0Ch]
100010B5 8B 54 24 04          mov         edx,dword ptr [esp+4]
100010B9 53                   push        ebx
100010BA 55                   push        ebp
100010BB 8B 6C 24 1C          mov         ebp,dword ptr [esp+1Ch]
100010BF 56                   push        esi
100010C0 C1 E1 0A             shl         ecx,0Ah
100010C3 C1 E5 0A             shl         ebp,0Ah
100010C6 89 4C 24 28          mov         dword ptr [esp+28h],ecx
100010CA 8B 4C 24 24          mov         ecx,dword ptr [esp+24h]
100010CE 03 EA                add         ebp,edx
100010D0 57                   push        edi
100010D1 03 E9                add         ebp,ecx
100010D3 8B 4C 24 30          mov         ecx,dword ptr [esp+30h]
100010D7 89 44 24 1C          mov         dword ptr [esp+1Ch],eax
100010DB 33 C0                xor         eax,eax
100010DD 85 C9                test        ecx,ecx
100010DF 7E 38                jle         SpecialBltArray+79h (10001119)
100010E1 8B 7C 24 34          mov         edi,dword ptr [esp+34h]
100010E5 8B 74 24 20          mov         esi,dword ptr [esp+20h]
100010E9 C1 E7 08             shl         edi,8
100010EC 8B 4C 24 2C          mov         ecx,dword ptr [esp+2Ch]
100010F0 8B 54 24 18          mov         edx,dword ptr [esp+18h]
100010F4 03 CE                add         ecx,esi
100010F6 33 DB                xor         ebx,ebx
100010F8 8A 1C 28             mov         bl,byte ptr [eax+ebp]
100010FB 03 CA                add         ecx,edx
100010FD 33 D2                xor         edx,edx
100010FF 8A 11                mov         dl,byte ptr [ecx]
10001101 03 D7                add         edx,edi
10001103 C1 E2 08             shl         edx,8
10001106 40                   inc         eax
10001107 46                   inc         esi
10001108 8A 94 1A 0C 33 01 10 mov         dl,byte ptr [edx+ebx+1001330Ch]
1000110F 88 11                mov         byte ptr [ecx],dl
10001111 8B 4C 24 30          mov         ecx,dword ptr [esp+30h]
10001115 3B C1                cmp         eax,ecx
10001117 7C D3                jl          SpecialBltArray+4Ch (100010ec)
10001119 8B 74 24 2C          mov         esi,dword ptr [esp+2Ch]
1000111D 8B 44 24 1C          mov         eax,dword ptr [esp+1Ch]
10001121 81 C6 00 04 00 00    add         esi,400h
10001127 81 C5 00 04 00 00    add         ebp,400h
1000112D 48                   dec         eax
1000112E 89 74 24 2C          mov         dword ptr [esp+2Ch],esi
10001132 89 44 24 1C          mov         dword ptr [esp+1Ch],eax
10001136 75 A3                jne         SpecialBltArray+3Bh (100010db)
10001138 5F                   pop         edi
10001139 5E                   pop         esi
1000113A 5D                   pop         ebp
1000113B 5B                   pop         ebx
1000113C C2 24 00             ret         24

Here is the source code.

http://server2045.virtualave.net/mom...0-DLL-2-VB.zip

[Chris]

MoMad, does my another post help?

regards

[MoMad]

Which post are u talking about??

[Chris]

don't know it can help or not... http://www.vbforums.com/showthread.p...495#post537495

[MoMad]

Thanks

[MoMad]

OK, what im trying to do EXACTLY is that I want to pass a 2D array from VB to the dll and modify that array.

I have tried the MSDN and everything there is to try but they all talk of a single dimension array.

I tried Array(0,0) but that just gives me an error in VB. also, if i try just passing Array() that will also give me an error in VB.

ANY HELP HERE????