diff --git a/dlls/msi/action.c b/dlls/msi/action.c
index 0be284e1e7f..83393ee7e59 100644
--- a/dlls/msi/action.c
+++ b/dlls/msi/action.c
@@ -1400,7 +1400,7 @@ static BOOL ACTION_HandleStandardAction(MSIPACKAGE *package, LPCWSTR action,
     return ret;
 }
 
-BOOL ACTION_HandleDialogBox(MSIPACKAGE *package, LPCWSTR dialog, UINT* rc)
+static BOOL ACTION_HandleDialogBox( MSIPACKAGE *package, LPCWSTR dialog, UINT* rc )
 {
     BOOL ret = FALSE;
 
@@ -1412,8 +1412,8 @@ BOOL ACTION_HandleDialogBox(MSIPACKAGE *package, LPCWSTR dialog, UINT* rc)
     return ret;
 }
 
-BOOL ACTION_HandleCustomAction(MSIPACKAGE* package, LPCWSTR action, UINT* rc, 
-                               BOOL force )
+static BOOL ACTION_HandleCustomAction( MSIPACKAGE* package, LPCWSTR action,
+                                       UINT* rc, BOOL force )
 {
     BOOL ret=FALSE;
     UINT arc;
@@ -1993,7 +1993,7 @@ UINT schedule_action(MSIPACKAGE *package, UINT script, LPCWSTR action)
    return ERROR_SUCCESS;
 }
 
-UINT execute_script(MSIPACKAGE *package, UINT script )
+static UINT execute_script(MSIPACKAGE *package, UINT script )
 {
     int i;
     UINT rc = ERROR_SUCCESS;
@@ -2259,7 +2259,7 @@ LPWSTR resolve_folder(MSIPACKAGE *package, LPCWSTR name, BOOL source,
 }
 
 /* scan for and update current install states */
-void ACTION_UpdateInstallStates(MSIPACKAGE *package)
+static void ACTION_UpdateInstallStates(MSIPACKAGE *package)
 {
     int i;
     LPWSTR productcode;
@@ -4243,7 +4243,7 @@ typedef struct {
     ITypeLib    *ptLib;
 } typelib_struct;
 
-BOOL CALLBACK Typelib_EnumResNameProc( HMODULE hModule, LPCWSTR lpszType, 
+static BOOL CALLBACK Typelib_EnumResNameProc( HMODULE hModule, LPCWSTR lpszType, 
                                        LPWSTR lpszName, LONG_PTR lParam)
 {
     TLIBATTR *attr;
@@ -7206,7 +7206,7 @@ static LPWSTR load_ttfname_from(LPCWSTR filename)
                 {
                     int nPos;
                     LPSTR buf;
-                    static const LPSTR tt = " (TrueType)";
+                    static LPCSTR tt = " (TrueType)";
 
                     ttRecord.uStringLength = SWAPWORD(ttRecord.uStringLength);
                     ttRecord.uStringOffset = SWAPWORD(ttRecord.uStringOffset);
diff --git a/dlls/msi/action.h b/dlls/msi/action.h
index 9f8da9da589..351596ff833 100644
--- a/dlls/msi/action.h
+++ b/dlls/msi/action.h
@@ -220,3 +220,5 @@ VOID ControlEvent_FireSubscribedEvent(MSIPACKAGE *package, LPCWSTR event,
 VOID ControlEvent_CleanupSubscriptions(MSIPACKAGE *package);
 VOID ControlEvent_SubscribeToEvent(MSIPACKAGE *package, LPCWSTR event,
                                    LPCWSTR control, LPCWSTR attribute);
+VOID ControlEvent_UnSubscribeToEvent( MSIPACKAGE *package, LPCWSTR event,
+                                      LPCWSTR control, LPCWSTR attribute );
diff --git a/dlls/msi/msipriv.h b/dlls/msi/msipriv.h
index d41f7cf56f7..8f0aa20f7e7 100644
--- a/dlls/msi/msipriv.h
+++ b/dlls/msi/msipriv.h
@@ -365,8 +365,8 @@ extern UINT MSI_GetFeatureStateW( MSIPACKAGE *, LPWSTR, INSTALLSTATE *, INSTALLS
 extern UINT WINAPI MSI_SetFeatureStateW(MSIPACKAGE*, LPCWSTR, INSTALLSTATE );
 
 /* for deformating */
-extern UINT MSI_FormatRecordW(MSIPACKAGE* package, MSIRECORD* record, 
-                              LPWSTR buffer, DWORD *size);
+extern UINT MSI_FormatRecordW( MSIPACKAGE *, MSIRECORD *, LPWSTR, DWORD * );
+extern UINT MSI_FormatRecordA( MSIPACKAGE *, MSIRECORD *, LPSTR, DWORD * );
     
 /* registry data encoding/decoding functions */
 extern BOOL unsquash_guid(LPCWSTR in, LPWSTR out);
@@ -398,6 +398,22 @@ extern BOOL msi_dialog_register_class( void );
 extern void msi_dialog_unregister_class( void );
 extern void msi_dialog_handle_event( msi_dialog*, LPCWSTR, LPCWSTR, MSIRECORD * );
 
+/* preview */
+extern MSIPREVIEW *MSI_EnableUIPreview( MSIDATABASE * );
+extern UINT MSI_PreviewDialogW( MSIPREVIEW *, LPCWSTR );
+
+/* undocumented functions */
+UINT WINAPI MsiCreateAndVerifyInstallerDirectory( DWORD );
+UINT WINAPI MsiDecomposeDescriptorW( LPCWSTR, LPWSTR, LPWSTR, LPWSTR, DWORD * );
+UINT WINAPI MsiDecomposeDescriptorA( LPCSTR, LPSTR, LPSTR, LPSTR, DWORD * );
+LANGID WINAPI MsiLoadStringW( MSIHANDLE, UINT, LPWSTR, int, LANGID );
+LANGID WINAPI MsiLoadStringA( MSIHANDLE, UINT, LPSTR, int, LANGID );
+
+HRESULT WINAPI MSI_DllGetClassObject( REFCLSID, REFIID, LPVOID * );
+HRESULT WINAPI MSI_DllRegisterServer( void );
+HRESULT WINAPI MSI_DllUnregisterServer( void );
+BOOL WINAPI MSI_DllCanUnloadNow( void );
+
 /* UI globals */
 extern INSTALLUILEVEL gUILevel;
 extern HWND gUIhwnd;