Steps to Install ImageMagick on UwAmp for Windows:
as of March 31, 2016
Detailed guide for newbies like me.
... continued
4. Goto:
    http://pecl.php.net/package/imagick
    as of today, latest is 3.4.1 so I went to:
    http://pecl.php.net/package/imagick/3.4.1/windows
    My PHP version is: 5.6.18, and Thread Safety is Yes from
    Step #1, so I downloaded:
       5.6 Thread Safe (TS) x86
    I got: php_imagick-3.4.1-5.6-ts-vc11-x86.zip
5. Unzip and copy "php_imagick.dll" to the php extension folder:
    In my case:
    php_imagick.dll --> C:\UwAmp\bin\php\php-5.6.18\ext
    Note: this ZIP also contains dlls which other guides says
    to extract to the extension folder of apache.
    NO NEED TO DO IT. Step #3 has taken care of it.
6. Edit "php.ini" and add at the very end (could be 
    anywhere I suppose):
      [Imagick]
      extension=php_imagick.dll
      For super newbies: click the edit button in the UwAmp UI,
      "php_uwamp.ini" will open and edit it. It will be copied to
      the correct php.ini when UwAmp is restarted. I had 
      trouble at first since there are several php*.ini scattered 
      all over.
7. Restart Apache
8. Check PHPInfo
    scroll to section (or find): imagick    
    number of supported formats: 234
    If there is no "imagick" section or "supported format" is 0,
    something went wrong.
Hope this helps.