C-API, Wand, MagickGetImageProfile and EXIF-Data

Hello,
I use the C-API MagickWand with the following function:

unsigned char *MagickGetImageProfile( MagickWand *wand, const char
*name, unsigned long *length );

The poor documentation tells:

	name:
	  Name of profile to return: ICC, IPTC, or generic profile.

for the parameter name. No more infos found. Google: no results for 'C'.

If I call MagickGetImageProfile(wand, "EXIF", &size), then I get ~57kB
char* Data (binary). What can I do with that result? I want to extract,
title, date and author. And I want to set title or comment.

Can some body tell me, where I found documentation?

Thank you in advance

Manfred

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