diff --git a/dlls/difxapi/Makefile.in b/dlls/difxapi/Makefile.in
index 17ddaa27620..68aba98450f 100644
--- a/dlls/difxapi/Makefile.in
+++ b/dlls/difxapi/Makefile.in
@@ -1,3 +1,6 @@
 MODULE = difxapi.dll
 
+C_SRCS = \
+	main.c
+
 @MAKE_DLL_RULES@
diff --git a/dlls/difxapi/difxapi.spec b/dlls/difxapi/difxapi.spec
index a7f6ade49b5..6fbc0bb725b 100644
--- a/dlls/difxapi/difxapi.spec
+++ b/dlls/difxapi/difxapi.spec
@@ -4,7 +4,7 @@
 @ stub DriverPackageGetPathW
 @ stub DriverPackageInstallA
 @ stub DriverPackageInstallW
-@ stub DriverPackagePreinstallA
-@ stub DriverPackagePreinstallW
+@ stdcall DriverPackagePreinstallA(str long)
+@ stdcall DriverPackagePreinstallW(wstr long)
 @ stub DriverPackageUninstallA
 @ stub DriverPackageUninstallW
diff --git a/dlls/difxapi/main.c b/dlls/difxapi/main.c
new file mode 100644
index 00000000000..047b912bad3
--- /dev/null
+++ b/dlls/difxapi/main.c
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2013 André Hentschel
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#include <stdarg.h>
+
+#include "windef.h"
+#include "winbase.h"
+#include "difxapi.h"
+#include "wine/debug.h"
+
+WINE_DEFAULT_DEBUG_CHANNEL(difxapi);
+
+DWORD WINAPI DriverPackagePreinstallA(LPCSTR inf, DWORD flags)
+{
+    FIXME("(%s, %u) stub\n", wine_dbgstr_a(inf), flags);
+    return ERROR_SUCCESS;
+}
+
+DWORD WINAPI DriverPackagePreinstallW(LPCWSTR inf, DWORD flags)
+{
+    FIXME("(%s, %u) stub\n", wine_dbgstr_w(inf), flags);
+    return ERROR_SUCCESS;
+}
diff --git a/include/Makefile.in b/include/Makefile.in
index 6517393f73a..c3a39bcd08a 100644
--- a/include/Makefile.in
+++ b/include/Makefile.in
@@ -246,6 +246,7 @@ SRCDIR_INCLUDES = \
 	devguid.h \
 	devpkey.h \
 	devpropdef.h \
+	difxapi.h \
 	digitalv.h \
 	dinput.h \
 	dinputd.h \
diff --git a/include/difxapi.h b/include/difxapi.h
new file mode 100644
index 00000000000..f5149b8b0b9
--- /dev/null
+++ b/include/difxapi.h
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2013 André Hentschel
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#ifndef __WINE_DIFXAPI_H
+#define __WINE_DIFXAPI_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct _INSTALLERINFO_A
+{
+    PSTR pApplicationId;
+    PSTR pDisplayName;
+    PSTR pProductName;
+    PSTR pMfgName;
+} INSTALLERINFO_A, *PINSTALLERINFO_A;
+typedef const PINSTALLERINFO_A PCINSTALLERINFO_A;
+
+typedef struct _INSTALLERINFO_W
+{
+    PWSTR pApplicationId;
+    PWSTR pDisplayName;
+    PWSTR pProductName;
+    PWSTR pMfgName;
+} INSTALLERINFO_W, *PINSTALLERINFO_W;
+typedef const PINSTALLERINFO_W PCINSTALLERINFO_W;
+
+typedef enum _DIFXAPI_LOG
+{
+    DIFXAPI_SUCCESS,
+    DIFXAPI_INFO,
+    DIFXAPI_WARNING,
+    DIFXAPI_ERROR,
+} DIFXAPI_LOG;
+
+typedef VOID (CALLBACK *DIFXAPILOGCALLBACK_A)(DIFXAPI_LOG,DWORD,PCSTR,PVOID);
+typedef VOID (CALLBACK *DIFXAPILOGCALLBACK_W)(DIFXAPI_LOG,DWORD,PCWSTR,PVOID);
+
+VOID  WINAPI DIFXAPISetLogCallbackA(DIFXAPILOGCALLBACK_A,VOID*);
+VOID  WINAPI DIFXAPISetLogCallbackW(DIFXAPILOGCALLBACK_W,VOID*);
+DWORD WINAPI DriverPackageGetPathA(PCSTR,PSTR,DWORD*);
+DWORD WINAPI DriverPackageGetPathW(PCWSTR,PWSTR,DWORD*);
+DWORD WINAPI DriverPackageInstallA(PCSTR,DWORD,PCINSTALLERINFO_A,BOOL*);
+DWORD WINAPI DriverPackageInstallW(PCWSTR,DWORD,PCINSTALLERINFO_W,BOOL*);
+DWORD WINAPI DriverPackagePreinstallA(PCSTR,DWORD);
+DWORD WINAPI DriverPackagePreinstallW(PCWSTR,DWORD);
+DWORD WINAPI DriverPackageUninstallA(PCSTR,DWORD,PCINSTALLERINFO_A,BOOL*);
+DWORD WINAPI DriverPackageUninstallW(PCWSTR,DWORD,PCINSTALLERINFO_W,BOOL*);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  /* __WINE_DIFXAPI_H */