Ok, sorry now in slow motion ;o)).
Ok I use the Qt Library (4.4.1). Thatswhy I have make the script/tool or what ever with the the name QMake which runs qmake in the projectdir. After this process it generate a makefile(custom makefile) and a makefile.debug and makefile.release.
after all I have to add my lib(SQLAPI++) my pro file looks like this
TEMPLATE = app
TARGET =
DESTDIR = bin/
DEPENDPATH += . HEADERS SOURCES
INCLUDEPATH += .
QT += network xml svg sql
HEADERS += HEADERS/window.h \
HEADERS/ConDB.h
SOURCES += SOURCES/window.cpp \
SOURCES/main.cpp
RESOURCES += TraDa.qrc
CONFIG += debug
win32:LIBS += C:/SqlApi/lib/libsqlapidll.a
RC_FILE += RESOURCESFILES/TraDa.rc
and when I add the directories of the header in Project->Buildoptions