Thread: dll help...

I am making dlls for Game Maker. There is a certain way to make them. Here is the code to make a function...

Code:

extern "C" __declspec(dllexport) __stdcall double rh_deletefile(LPCTSTR arg1);

extern "C" __declspec(dllexport) __stdcall double rh_deletefile(LPCTSTR arg1)
{
    
    //functions stuff here

    return 0;  //it has to return somthing or it won't work
};

The rest of the code doesnt' matter, that all works. Now notice the LPCTSTR arg1. I belive most people know what that is. But if you don't that is how I transfer stuff between game maker and the dll basicly. (gives more flexability). So heres the probelem.

I want a function that gives the computers name (for example). Now I can not return it because it is a word nto a number. I need to know how I can return it or somthing so I can send it to Game Maker.

Here is the code so far...

Code:

extern "C" __declspec(dllexport) __stdcall double rh_getcomputername();

extern "C" __declspec(dllexport) __stdcall double rh_getcomputername()
{
    LPTSTR computername;
    DWORD* size;
    
    GetComputerName(
    computername,
    size
    );

    return 0;

};

I only need computername, not the size.

I'm not sure at all how I would do this. Please help me.

Oh and sending it to a variable throw the code here and then trying to call the cariable throw Game Maker doesn't work, I just tired that.

Code:

    #include <windows.h>

    TCHAR computername[MAX_COMPUTERNAME_LENGTH + 1];
    DWORD sz = sizeof(computername) / sizeof(*computername);

    BOOL ret = GetComputerName(computername, &sz);

gg

alright that really doens't help much, it doesn't solve my probeblem.

but you did solve an error I had with Game Maker....

Code:

extern "C" __declspec(dllexport) __stdcall BOOL GetComputerName(LPTSTR lpBuff, UINT bufflen)
{
    DWORD size = bufflen
    return GetComputerName(lpBuff, &size);
}