this is the build log now ...
-------------- Build: Debug in progetto_test ---------------
mingw32-g++.exe -Wall -pipe -mthreads -D__GNUWIN32__ -D__WXMSW__ -DWXUSINGDLL -DwxUSE_UNICODE -g -IC:\SourceCode\Libraries\wxWidgets2.8\include -IC:\SourceCode\Libraries\wxWidgets2.8\contrib\include -IC:\SourceCode\Libraries\wxWidgets2.8\additions\include -IC:\SourceCode\Libraries\wxWidgets2.8\lib\gcc_dll\mswu -c "C:\Documents and Settings\UTENTE\Documenti\Andrea\programmazione\progetto_test\progetto_testApp.cpp" -o obj\Debug\progetto_testApp.o
mingw32-g++.exe -Wall -pipe -mthreads -D__GNUWIN32__ -D__WXMSW__ -DWXUSINGDLL -DwxUSE_UNICODE -g -IC:\SourceCode\Libraries\wxWidgets2.8\include -IC:\SourceCode\Libraries\wxWidgets2.8\contrib\include -IC:\SourceCode\Libraries\wxWidgets2.8\additions\include -IC:\SourceCode\Libraries\wxWidgets2.8\lib\gcc_dll\mswu -c "C:\Documents and Settings\UTENTE\Documenti\Andrea\programmazione\progetto_test\progetto_testMain.cpp" -o obj\Debug\progetto_testMain.o
windres.exe -i C:\DOCUME~1\UTENTE\DOCUME~1\Andrea\PROGRA~1\PROGET~1\resource.rc -J rc -o obj\Debug\resource.res -O coff -IC:\SourceCode\Libraries\wxWidgets2.8\include -IC:\SourceCode\Libraries\wxWidgets2.8\lib\gcc_dll\mswu
mingw32-g++.exe -Wall -pipe -mthreads -D__GNUWIN32__ -D__WXMSW__ -DWXUSINGDLL -DwxUSE_UNICODE -g -IC:\SourceCode\Libraries\wxWidgets2.8\include -IC:\SourceCode\Libraries\wxWidgets2.8\contrib\include -IC:\SourceCode\Libraries\wxWidgets2.8\additions\include -IC:\SourceCode\Libraries\wxWidgets2.8\lib\gcc_dll\mswu -c "C:\Documents and Settings\UTENTE\Documenti\Andrea\programmazione\progetto_test\GUIFrame.cpp" -o obj\Debug\GUIFrame.o
mingw32-g++.exe -LC:\SourceCode\Libraries\wxWidgets2.8\lib\gcc_dll -LC:\SourceCode\Libraries\wxWidgets2.8\lib\gcc_lib -LC:\SourceCode\Libraries\wxWidgets2.8\additions\lib\gcc_lib -LC:\SourceCode\Libraries\wxWidgets2.8\additions\lib\gcc_dll -o bin\Debug\progetto_test.exe obj\Debug\progetto_testApp.o obj\Debug\progetto_testMain.o obj\Debug\GUIFrame.o obj\Debug\resource.res -lwxmsw28u -lwxpngd -lwxjpegd -lwxtiffd -lwxzlibd -lwxmsw28ud_awx -lwxmsw28ud_plot -lwxmsw28ud_plotctrl -lwxmsw28ud_things -mwindows
obj\Debug\GUIFrame.o: In function `_ZN12wxStringData4LockEv':
C:/SourceCode/Libraries/wxWidgets2.8/include/wx/string.h:(.text+0xb18): undefined reference to `__imp___ZN10wxPlotCtrl20SetAreaMouseFunctionE20wxPlotCtrlMouse_Typeb'
C:/SourceCode/Libraries/wxWidgets2.8/include/wx/string.h:(.text+0xb33): undefined reference to `__imp___ZN10wxPlotCtrl18SetAreaMouseMarkerE21wxPlotCtrlMarker_Type'
C:/SourceCode/Libraries/wxWidgets2.8/include/wx/string.h:(.text+0xbab): undefined reference to `__imp___ZN10wxPlotCtrl13SetXAxisLabelERK8wxString'
C:/SourceCode/Libraries/wxWidgets2.8/include/wx/string.h:(.text+0xc53): undefined reference to `__imp___ZN10wxPlotCtrl13SetYAxisLabelERK8wxString'
C:/SourceCode/Libraries/wxWidgets2.8/include/wx/string.h:(.text+0xce2): undefined reference to `__imp___ZN10wxPlotCtrl12SetPlotTitleERK8wxString'
C:/SourceCode/Libraries/wxWidgets2.8/include/wx/string.h:(.text+0xeca): undefined reference to `__imp___ZN10wxPlotCtrl14SetKeyPositionERK7wxPointb'
obj\Debug\GUIFrame.o: In function `_ZN8GUIFrameC1EP8wxWindowiRK8wxStringRK7wxPointRK6wxSizel':
C:/Documents and Settings/UTENTE/Documenti/Andrea/programmazione/progetto_test/GUIFrame.cpp:53: undefined reference to `__imp___ZN10wxPlotCtrl20SetAreaMouseFunctionE20wxPlotCtrlMouse_Typeb'
C:/Documents and Settings/UTENTE/Documenti/Andrea/programmazione/progetto_test/GUIFrame.cpp:54: undefined reference to `__imp___ZN10wxPlotCtrl18SetAreaMouseMarkerE21wxPlotCtrlMarker_Type'
C:/Documents and Settings/UTENTE/Documenti/Andrea/programmazione/progetto_test/GUIFrame.cpp:58: undefined reference to `__imp___ZN10wxPlotCtrl13SetXAxisLabelERK8wxString'
C:/Documents and Settings/UTENTE/Documenti/Andrea/programmazione/progetto_test/GUIFrame.cpp:61: undefined reference to `__imp___ZN10wxPlotCtrl13SetYAxisLabelERK8wxString'
C:/Documents and Settings/UTENTE/Documenti/Andrea/programmazione/progetto_test/GUIFrame.cpp:63: undefined reference to `__imp___ZN10wxPlotCtrl12SetPlotTitleERK8wxString'
C:/Documents and Settings/UTENTE/Documenti/Andrea/programmazione/progetto_test/GUIFrame.cpp:65: undefined reference to `__imp___ZN10wxPlotCtrl14SetKeyPositionERK7wxPointb'
obj\Debug\GUIFrame.o: In function `_ZN12wxStringData4LockEv':
C:/SourceCode/Libraries/wxWidgets2.8/include/wx/string.h:(.text$_ZN10wxPlotCtrl10SetShowKeyEb[wxPlotCtrl::SetShowKey(bool)]+0x28): undefined reference to `__imp___ZN10wxPlotCtrl6RedrawEi'
C:/SourceCode/Libraries/wxWidgets2.8/include/wx/string.h:(.text$_ZN10wxPlotCtrl16SetShowPlotTitleEb[wxPlotCtrl::SetShowPlotTitle(bool)]+0x5a): undefined reference to `__imp___ZN10wxPlotCtrl6DoSizeERK6wxRectb'
C:/SourceCode/Libraries/wxWidgets2.8/include/wx/string.h:(.text$_ZN10wxPlotCtrl17SetShowYAxisLabelEb[wxPlotCtrl::SetShowYAxisLabel(bool)]+0x5a): undefined reference to `__imp___ZN10wxPlotCtrl6DoSizeERK6wxRectb'
C:/SourceCode/Libraries/wxWidgets2.8/include/wx/string.h:(.text$_ZN10wxPlotCtrl12SetShowYAxisEb[wxPlotCtrl::SetShowYAxis(bool)]+0x5a): undefined reference to `__imp___ZN10wxPlotCtrl6DoSizeERK6wxRectb'
C:/SourceCode/Libraries/wxWidgets2.8/include/wx/string.h:(.text$_ZN10wxPlotCtrl17SetShowXAxisLabelEb[wxPlotCtrl::SetShowXAxisLabel(bool)]+0x5a): undefined reference to `__imp___ZN10wxPlotCtrl6DoSizeERK6wxRectb'
C:/SourceCode/Libraries/wxWidgets2.8/include/wx/string.h:(.text$_ZN10wxPlotCtrl12SetShowXAxisEb[wxPlotCtrl::SetShowXAxis(bool)]+0x5a): undefined reference to `__imp___ZN10wxPlotCtrl6DoSizeERK6wxRectb'
C:/SourceCode/Libraries/wxWidgets2.8/include/wx/string.h:(.text$_ZN10wxPlotCtrl18SetCrossHairCursorEb[wxPlotCtrl::SetCrossHairCursor(bool)]+0x5e): undefined reference to `__imp___ZN10wxPlotCtrl6RedrawEi'
C:/SourceCode/Libraries/wxWidgets2.8/include/wx/string.h:(.text$_ZN10wxPlotCtrl11SetDrawGridEb[wxPlotCtrl::SetDrawGrid(bool)]+0x28): undefined reference to `__imp___ZN10wxPlotCtrl6RedrawEi'
C:/SourceCode/Libraries/wxWidgets2.8/include/wx/string.h:(.text$_ZN10wxPlotCtrl13SetDrawSplineEb[wxPlotCtrl::SetDrawSpline(bool)]+0x28): undefined reference to `__imp___ZN10wxPlotCtrl6RedrawEi'
C:/SourceCode/Libraries/wxWidgets2.8/include/wx/string.h:(.text$_ZN10wxPlotCtrl12SetDrawLinesEb[wxPlotCtrl::SetDrawLines(bool)]+0x28): undefined reference to `__imp___ZN10wxPlotCtrl6RedrawEi'
C:/SourceCode/Libraries/wxWidgets2.8/include/wx/string.h:(.text$_ZN10wxPlotCtrl14SetDrawSymbolsEb[wxPlotCtrl::SetDrawSymbols(bool)]+0x28): undefined reference to `__imp___ZN10wxPlotCtrl6RedrawEi'
C:/SourceCode/Libraries/wxWidgets2.8/include/wx/string.h:(.text$_ZN10wxPlotCtrlC1EP8wxWindowiRK7wxPointRK6wxSize19wxPlotCtrlAxis_TypeRK8wxString[wxPlotCtrl::wxPlotCtrl(wxWindow*, int, wxPoint const&, wxSize const&, wxPlotCtrlAxis_Type, wxString const&)]+0x4e): undefined reference to `__imp___ZTV10wxPlotCtrl'
C:/SourceCode/Libraries/wxWidgets2.8/include/wx/string.h:(.text$_ZN10wxPlotCtrlC1EP8wxWindowiRK7wxPointRK6wxSize19wxPlotCtrlAxis_TypeRK8wxString[wxPlotCtrl::wxPlotCtrl(wxWindow*, int, wxPoint const&, wxSize const&, wxPlotCtrlAxis_Type, wxString const&)]+0x2e7): undefined reference to `__imp___ZN10wxPlotCtrl4InitEv'
C:/SourceCode/Libraries/wxWidgets2.8/include/wx/string.h:(.text$_ZN10wxPlotCtrlC1EP8wxWindowiRK7wxPointRK6wxSize19wxPlotCtrlAxis_TypeRK8wxString[wxPlotCtrl::wxPlotCtrl(wxWindow*, int, wxPoint const&, wxSize const&, wxPlotCtrlAxis_Type, wxString const&)]+0x325): undefined reference to `__imp___ZN10wxPlotCtrl6CreateEP8wxWindowiRK7wxPointRK6wxSize19wxPlotCtrlAxis_TypeRK8wxString'
C:/SourceCode/Libraries/wxWidgets2.8/include/wx/string.h:(.text$_ZN10wxPlotCtrlC1EP8wxWindowiRK7wxPointRK6wxSize19wxPlotCtrlAxis_TypeRK8wxString[wxPlotCtrl::wxPlotCtrl(wxWindow*, int, wxPoint const&, wxSize const&, wxPlotCtrlAxis_Type, wxString const&)]+0x525): undefined reference to `__imp___ZN19wxArrayRect2DDoubleD1Ev'
C:/SourceCode/Libraries/wxWidgets2.8/include/wx/string.h:(.text$_ZN10wxPlotCtrlC1EP8wxWindowiRK7wxPointRK6wxSize19wxPlotCtrlAxis_TypeRK8wxString[wxPlotCtrl::wxPlotCtrl(wxWindow*, int, wxPoint const&, wxSize const&, wxPlotCtrlAxis_Type, wxString const&)]+0x62c): undefined reference to `__imp___ZN17wxArrayPlotMarkerD1Ev'
C:/SourceCode/Libraries/wxWidgets2.8/include/wx/string.h:(.text$_ZN10wxPlotCtrlC1EP8wxWindowiRK7wxPointRK6wxSize19wxPlotCtrlAxis_TypeRK8wxString[wxPlotCtrl::wxPlotCtrl(wxWindow*, int, wxPoint const&, wxSize const&, wxPlotCtrlAxis_Type, wxString const&)]+0x657): undefined reference to `__imp___ZN27wxArrayRangeDoubleSelectionD1Ev'
C:/SourceCode/Libraries/wxWidgets2.8/include/wx/string.h:(.text$_ZN10wxPlotCtrlC1EP8wxWindowiRK7wxPointRK6wxSize19wxPlotCtrlAxis_TypeRK8wxString[wxPlotCtrl::wxPlotCtrl(wxWindow*, int, wxPoint const&, wxSize const&, wxPlotCtrlAxis_Type, wxString const&)]+0x682): undefined reference to `__imp___ZN24wxArrayRangeIntSelectionD1Ev'
C:/SourceCode/Libraries/wxWidgets2.8/include/wx/string.h:(.text$_ZN10wxPlotCtrlC1EP8wxWindowiRK7wxPointRK6wxSize19wxPlotCtrlAxis_TypeRK8wxString[wxPlotCtrl::wxPlotCtrl(wxWindow*, int, wxPoint const&, wxSize const&, wxPlotCtrlAxis_Type, wxString const&)]+0x6d6): undefined reference to `__imp___ZN16wxArrayPlotCurveD1Ev'
C:/SourceCode/Libraries/wxWidgets2.8/include/wx/string.h:(.text$_ZN12wxPlotMarkerD1Ev[wxPlotMarker::~wxPlotMarker()]+0xa): undefined reference to `__imp___ZTV12wxPlotMarker'
C:/SourceCode/Libraries/wxWidgets2.8/include/wx/string.h:(.text$_ZN12wxPlotMarkerC1Ev[wxPlotMarker::wxPlotMarker()]+0x15): undefined reference to `__imp___ZTV12wxPlotMarker'
collect2: ld returned 1 exit status
Process terminated with status 1 (0 minutes, 9 seconds)
33 errors, 0 warnings
Andrea C.