fixadvance.c

CTFontRef displayFont = CTFontCreateWithName(CFSTR("Andale Mono"), 18.0, NULL);
	
float charWidth = 18.0;
CFTypeRef keys[1];
CFTypeRef values[1];
	
keys[0] = kCTFontFixedAdvanceAttribute;
values[0] = CFNumberCreate(nil, kCFNumberFloatType, (void *)&charWidth);
	
CFDictionaryRef fontAttributes = CFDictionaryCreate(NULL, (const void **)keys, (const void **)values, 1, NULL, NULL);
CTFontDescriptorRef fontDescriptor = CTFontDescriptorCreateWithAttributes(fontAttributes);
CTFontRef displayFont2 = CTFontCreateCopyWithAttributes(displayFont, 0.0, NULL, fontDescriptor);
	
// use the font
CFAttributedStringSetAttribute(attrString, CFRangeMake(0, len), kCTFontAttributeName, displayFont2);
	
CFRelease(fontDescriptor);
CFRelease(fontAttributes);
CFRelease(displayFont2);
CFRelease(displayFont);