Hi pallavi,
first make it clear which version you are using ...
Is it Visual C++ 6.0 with QT - commercial version.
and for system path
Goto control panel -> System -> Advanced Tab -> Environment variables.
There add or edit the variables
Path - C:\Qt\4.4.1\bin (according to ur version)
QTDIR - C:\Qt\4.4.1
and also better post ur .vcproj, .h, .cpp files
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