Delphi libs can be used in C++ ?

[Pyrogine]

NP, I struggled with these problems too so happy to share the stuff I've learned about it.

1. You just need to export CreateInterface/DestroyInterface routines from your Delphi made dll, such as I outlined above.

2. You need to dynamically load this DLL on the c++ side (use LoadLibrary) and bind to these two routines.

3. Define the interface class on the C++ side and pass a pointer to this class to CreateInterface:

CMyClass *myclass;

// create object instance
CreateInterface(0, &myclass);
...

// destroy object when your done
DestroyInterface(&myclass);

Note: You need to define the aObj as a pointer to a pointer (CreateInterface(int aIID, void **aObj); )because you need the modified pointer on return.

[arthurprs]

NP, I struggled with these problems too so happy to share the stuff I've learned about it.

1. You just need to export CreateInterface/DestroyInterface routines from your Delphi made dll, such as I outlined above.

2. You need to dynamically load this DLL on the c++ side (use LoadLibrary) and bind to these two routines.

3. Define the interface class on the C++ side and pass a pointer to this class to CreateInterface:

CMyClass *myclass;

// create object instance
CreateInterface(0, &myclass);
...

// destroy object when your done
DestroyInterface(&myclass);

Note: You need to define the aObj as a pointer to a pointer (CreateInterface(int aIID, void **aObj); )because you need the modified pointer on return.

Here the code only compile with a single *, and works nice

[Pyrogine]

Opps, yes, that is correct, only one * needed. You are passing by reference.

Glad to hear it's working for you. Keep us posted on your progress.

[arthurprs]

Everything is working perfectly until now, i will post some results soon;

[marcov]

[quote="arthurprs"]chronozphere:~
.lib are a file that C/C++ compilers use for static ]

Only MSVC. GCC uses .a

[arthurprs]

someone know why c++ don't have inttostr? wtf!

[Pyrogine]

Check sprintf.

[WILL]

someone know why c++ don't have inttostr? wtf!

C++ was invented by a telecom company... you do the math.

[arthurprs]

Im getting real problems now,
when compile the dll in FreePascal 2.2 the C++ program crashes...

someone knows if freepascal have problems in abstract classes, sddcall or dll's :?:

[Pyrogine]

The VMTs must match. I don't use FPC so I can't comment what the base object type is like, but make sure the VMT on the host side match what's on the DLL side. If you did not change the VMT on the C++ to match what it's like in FPC, then this can be a source of the problem. For example if you have more virtual methods in the C++ side than on the DLL side, when you call a c++ method it maybe calling the wrong method in the DLL side.

So, make sure your virtual methods and the calling conventions all match. There maybe other issue related to FPC, but again, I don't use it so I'm unable to offer any suggestions on its usage, sorry.