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// Function pointer prototype; this will be used to call the MAKE OBJECT CUBE function.
typedef void (__cdecl *fpMakeObjectCube)(int iID, float fSize);

// This is a global function pointer of the type we just declared. We will use it just as 
// dbMakeObjectCube() from DarkGDK.
fpMakeObjectCube dbMakeObjectCube = NULL;


__declspec ( dllexport ) void Constructor() {
    // This is called when your dll is loaded. Use it to allocate dynamic memory
    // or any other kind of setup your plugin requires.
}

__declspec ( dllexport ) void Destructor() {
    // As you would've guessed, this is called just before unloading your plugin.
    // Free dynamic memory and otherwise release resources / clean up after your dll.
}

__declspec ( dllexport ) void ReceiveCoreDataPtr ( void *pCore ) {
    // This is the function I was talking about; the pCore parameter is a pointer to 
    // an instance of the GlobStruct struct (include "globstruct.h" from DarkGDK / DarkSDK
    // to use it). You have to cast it from void to a pointer to the struct like so:
    GlobStruct *pGlob = (GlobStruct*)pCore;
    // You should obviously have a global variable pGlob instead so you can access it from elsewhere
    // in your plugin.
    // The GlobStruct contains HINSTANCE's of the dlls loaded by DBPro (as well as flags denoting 
    // whether they have indeed been loaded or not).
    // You can define a function pointer prototype that matches the desired function and then 
    // use GetProcAddress to convert a pointer to the dll function to your own prototype for later 
    // access.
    // As you saw, we set up a function pointer matching the dbMakeObjectCube function at the top
    // of this snippet. Now that we have access to the GlobStruct, we can use it to access this 
    // function from the dll, provided said dll has been loaded by the DBPro runtime.
    if(pGlob->g_Basic3Dmade)
        dbMakeObjectCube = (fpMakeObjectCube)GetProcAddress(pGlob->g_Basic3D, "?MakeCube@@YAXHM@Z");
    // If the Basic3D dll had indeed been loaded, dbMakeObjectCube now points to the function with 
    // the mangled name "?MakeCube@@YAXHM@Z" in DBProBasic3DDebug.dll.
    // You can find these names by opening the dll files in notepad and browsing around, searching 
    // for appropriate strings. You can also use more advanced dll inspecting software.
 }



// Custom function for your plugin that creates a unit cube for the given object ID.
__declspec ( dllexport ) void MakeUnitCube ( int iID ) {
    // The ReceiveDataPtr is called at dll initialization, so it has already been run before the first
    // possible call here.
    // dbMakeObjectCube is thus setup and will be pointing to the appropriate function in the core DBP
    // dll, alternatively it will be NULL if that dll wasn't loaded at runtime, due to no function from
    // it being used in the compiled DBPro program.
    if(dbMakeObjectCube)
        dbMakeObjectCube(iID, 1.0f);
    else
        // Display error message here if wanted
}