ftp.nice.ch/pub/next/developer/objc/fromnext/MiniExamples.91.9.s.tar.gz#/MiniExamples/ConvertXYtoChar/ConvertXY_main.m

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#import <stdlib.h>
#import <appkit/Application.h>

void main(int argc, char *argv[]) {
    NXApp = [Application new];
    [NXApp loadNibSection:"ConvertXY.nib" owner:NXApp];
    [NXApp run];
    [NXApp free];
    exit(0);
}

These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.