importing headers

[peace_comp]

Hey..
I devellop an Application Using Qt ..nd I wanna use Some headers of an open source Softwar (QGIS)
..but I have a Trouble with that ..I copied the header File from Qgis repertory.. to my application One ..but it doesnt work ..
I Guess i should Just Give the path of the qgis Header file nd lib file ...but I dont Know How..should I add them in the file.pro?

plz if someOne could Help !!!

[jpn]

Could you rephrase? Usually you use INCLUDEPATH and LIBS in .pro file to take external libraries into use.