Can I change the shape of the form in QML?

[chong_kimkeang]

I am designing my program with QML and now I want to change its form shape from a simple rectangle to my favorite shape. Can I change it? and If I can, how can I change?

[alizadeh91]

for using custom items in qtquick 1.0 you have to reimplement QDeclarativeItem and for Qt5 it's a little complicated!