Change the path 'C:\Programmi\Microsoft Platform SDK\' with the path where do you have installed the Microsoft Platform SDK Include Dirs= $(QTDIR)\include\Qt; $(QTDIR)\include\QtCore; $(QTDIR)\include\QtGui; $(QTDIR)\include\QtNetwork; $(QTDIR)\include\QtSvg; $(QTDIR)\include\QtXml; $(QTDIR)\include\Qt3Support; $(QTDIR)\include\ActiveQt; $(QTDIR)\include; C:\Programmi\Microsoft Platform SDK\Include; C:\Programmi\Microsoft Platform SDK\Include\mfc; $(VCInstallDir)include; $(FrameworkSDKDir)include Reference Dirs=$(FrameworkDir)$(FrameworkVersion) Library Dirs= $(QTDIR)\lib; C:\Programmi\Microsoft Platform SDK\Lib; $(VCInstallDir)lib; $(FrameworkSDKDir)lib; $(VSInstallDir); $(VSInstallDir)lib Source Dirs=$(VCInstallDir)crt\src Exclude Dirs=$ (VCInstallDir)include; $(VCInstallDir)PlatformSDK\include; $(FrameworkSDKDir)include; $(FrameworkDir)$(FrameworkVersion) Path Dirs= C:\Programmi\Microsoft Platform SDK\Bin; $(VCInstallDir)bin; $(VSInstallDir)Common7\Tools\bin; $(VSInstallDir)Common7\tools; $(VSInstallDir)Common7\ide; $(ProgramFiles)\HTML Help Workshop; $(FrameworkSDKDir)bin; $(FrameworkDir)$(FrameworkVersion); $(VSInstallDir); $(PATH)