AOA... I want to klnw that in islam what is the concept of ghost n unseen bt feelable evils?? Can they influence people by doing some type of magic or any procedure?
Does black magic really exist in islam??

Ghosts are called "jinn" in Islam. Black magic is known as "sihr"
Please refer to the following links for some extensive reading on the topic of Jinn,magic and evil.

Islam Question and Answer - The jinn (http://www.islamqa.com/en/ref/13378/jinn)

Islam Question and Answer -   Do the jinn help humans in some ways? (http://www.islamqa.com/en/ref/8214/jinn)

Islam Question and Answer - Can we see the jinn? Do they have a real form? (http://www.islamqa.com/en/ref/40703/jinn)

Islam Question and Answer - Sihr and its types (http://www.islamqa.com/en/ref/9432/sihr)

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Asslamo alaikum... I want to know about black magic in islam... what is about its existence in islam and what are its limitations and boundries?? kindly tell me about it in the light of ISLAM

Assalaamu Aleiqum,

Black magic exists in Islamic communities, but is certainly not sanctioned in Islam. Some people everywhere practice magic for good and evil. It is a sign of their desperation and disillusionment. It is a sickness of the spirit. Better to trust in Allah, who gives all we will ever need.

Wasalaam