DPlot

I have the following in my code:

#ifdef __GNUC__
HINSTANCE dll;
if((dll = dPlot_Init()) == NULL)
{
printf("LoadLibrary for DPLOTLIB.DLL failed.\n");
exit(0);
}
#endif
FreeLibrary(dll);

I'm getting the same error whether I link to dplotlib.dll or not.

Do I need to change this??

Using MinGw, I keep getting the following link error
C:\Program Files\MinGWStudio\AICont\Tst1.c:134: undefined reference to `DPlot_AddData8@24'
collect2: ld returned 1 exit status


If I comment out that line, the original DPLOT call works
I include DPlot.h, x is double x[500]. I mess around with ...