Salut,
j'essaye de passer sur Qt, j'ai donc téléchargé le dernière version et je l'ai installé sans problème.
La j'essaye Qt creator, je fait un projet d'application GUI de base sans rien ajouté et il ne me le compile pas, apparement il ne trouve pas les fichiers de Qt :

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Running build steps for project Test... Creating gdb macros library...
 Configuration unchanged, skipping QMake step.
 Starting: D:/Program Files/Qt/2009.01/mingw/bin/mingw32-make.exe debug -w 
 mingw32-make: Entering directory `D:/Mes Documents/Mes projets/C++/testQt/Test'
 D:/Program Files/Qt/2009.01/mingw/bin/mingw32-make -f Makefile.Debug
 mingw32-make[1]: Entering directory `D:/Mes Documents/Mes projets/C++/testQt/Test'
 g++ -c -g -frtti -fexceptions -mthreads -Wall -DUNICODE -DQT_LARGEFILE_SUPPORT -DQT_DLL -DQT_GUI_LIB -DQT_CORE_LIB -DQT_THREAD_SUPPORT -DQT_NEEDS_QMAIN -I"d:\Program" -I"Files\Qt\2009.01\qt\include\QtCore" -I"Files\Qt\2009.01\qt\include\QtGui" -I"Files\Qt\2009.01\qt\include" -I"Files\Qt\2009.01\qt\include\ActiveQt" -I"debug" -I"." -I"d:\Program Files\Qt\2009.01\qt\mkspecs\win32-g++" -o debug\main.o main.cpp
 mingw32-make[1]: Leaving directory `D:/Mes Documents/Mes projets/C++/testQt/Test'
 mingw32-make: Leaving directory `D:/Mes Documents/Mes projets/C++/testQt/Test'
 main.cpp:1:30: QtGui/QApplication: No such file or directory
 In file included from main.cpp:2:
 mainwindow.h:4:29: QtGui/QMainWindow: No such file or directory
 In file included from main.cpp:2:
 mainwindow.h:12: error: expected class-name before '{' token
 mainwindow.h:15: error: ISO C++ forbids declaration of `Q_OBJECT' with no type
 mainwindow.h:15: error: expected `;' before "public"
 main.cpp: In function `int main(int, char**)':
 main.cpp:6: error: `QApplication' was not declared in this scope
 main.cpp:6: error: expected `;' before "a"
 mainwindow.h:17: error: `MainWindow::~MainWindow()' is private
 main.cpp:7: error: within this context
 main.cpp:8: error: 'class MainWindow' has no member named 'show'
 main.cpp:9: error: `a' was not declared in this scope
 main.cpp:6: warning: unused variable 'QApplication'
 main.cpp:9: warning: unused variable 'a'
 mingw32-make[1]: *** [debug/main.o] Error 1
 mingw32-make: *** [debug] Error 2
 Exited with code 2.
 Error while building project Test
 When executing build step 'Make'
Est-ce que cela peut provenir d'un mauvaise installation ou c'est moi qui fait quelque chose de mal ?