call() with dialogs? [edit] in Developer Help

ID:142707
 
Mar 26 2008, 8:35 am (Edited on Mar 26 2008, 1:17 pm)
Code:
// byond_choosecolor.dll - relevant code

char *rgb(COLORREF rgbVal)
{
    int r = GetRValue(rgbVal), g = GetGValue(rgbVal), b = GetBValue(rgbVal);
    int rHi = r & 0x0F, gHi = g & 0x0F, bHi = b & 0x0F;
    int rLo = r >> 4, gLo = g >> 4, bLo = b >> 4;
    char *returnVal = new char[8];

    returnVal[0] = '#';
    returnVal[1] = (unsigned char)(rLo<10 ? rLo+48 : rLo+55);
    returnVal[2] = (unsigned char)(rHi<10 ? rHi+48 : rHi+55);
    returnVal[3] = (unsigned char)(gLo<10 ? gLo+48 : gLo+55);
    returnVal[4] = (unsigned char)(gHi<10 ? gHi+48 : gHi+55);
    returnVal[5] = (unsigned char)(bLo<10 ? bLo+48 : bLo+55);
    returnVal[6] = (unsigned char)(bHi<10 ? bHi+48 : bHi+55);
    returnVal[7] = '\0';
    return returnVal;
}

extern "C" __declspec(dllexport) char *byond_ChooseColor(int n, char *v[])
{
    CHOOSECOLOR cc;
    ::ZeroMemory(&cc, sizeof(cc));
    cc.lStructSize = sizeof(cc);
    cc.Flags = CC_PREVENTFULLOPEN;

    if(::ChooseColor(&cc))
        return rgb(cc.rgbResult);
    else return 0;
}

// test.dm

client/verb/Test()
    src << call("byond_choosecolor.dll", "byond_ChooseColor")()


Problem description:
I thought it would be neat to use a common Windows dialog box to select a color. The above was my initial attempt at it, but it doesn't really work. In fact, nothing happens after I execute the verb and allow access to the DLL---until I take focus from the Dream Seeker window, which causes Dream Seeker to crash abruptly. Is there something I'm missing out on entirely that's causing a major crash here, or is what I'm trying just not feasible?

I've uploaded the DLL itself temporarily here, so that you don't have to compile your own to test the above result if you can't or don't want to. Thanks in advance!

Edit: For some reason, I had some funky logic in the rgb() function. Fixed it, I think. Problem still stands with the crashing, though. :S

Hiead
#1 Mar 26 2008, 9:57 am
I thought the new call dll was performed by the server, not the client. If that is true, then it doesn't make sense to open a dialog. Imagine users on other computers causing your server to open dialogs.

I could be wrong...
#2 Mar 26 2008, 12:24 pm
In response to Traztx (#1)
Fortunately, not all games have to be MMORPGS. My personal favorite kind of game is a single-player RPG, but this could also be applied to anything where each player is running his or her own client. Multiplayer games can be made by connecting single-player worlds via Export()/Topic(), and possibly in the future via socket connections.

Hiead