diff --git a/reactos/include/psdk/pstore.idl b/reactos/include/psdk/pstore.idl
index 07fb2d6322c..62ce00b8da1 100644
--- a/reactos/include/psdk/pstore.idl
+++ b/reactos/include/psdk/pstore.idl
@@ -42,9 +42,13 @@ typedef struct _PST_PROVIDERINFO
     LPWSTR szProviderName;
 } PST_PROVIDERINFO, *PPST_PROVIDERINFO;
 
-typedef void *PPST_PROMPTIFO;
-
-
+typedef struct _PST_PROMPTINFO
+{
+    DWORD cbSize;
+    DWORD dwPromptFlags;
+    HWND hwndApp;
+    LPCWSTR szPrompt;
+} PST_PROMPTINFO, *PPST_PROMPTINFO;
 
 typedef struct {
     DWORD cbSize;
@@ -71,15 +75,9 @@ typedef struct {
     LPWSTR szDisplayName;
 } PST_TYPEINFO, *PPST_TYPEINFO;
 
-typedef struct {
-    DWORD cbSize;
-    DWORD dwPromptFlags;
-    DWORD_PTR  hwndApp;
-    LPCWSTR szPrompt;
-} PST_PROMPTINFO, *PPST_PROMPTINFO;
-
 [
   object,
+  uuid(5a6f1ec1-2db1-11d0-8c39-00c04fd9126b),
   pointer_default(unique)
 ]
 interface IEnumPStoreItems : IUnknown
@@ -100,6 +98,7 @@ interface IEnumPStoreItems : IUnknown
 
 [
   object,
+  uuid(789c1cbf-31ee-11d0-8c39-00c04fd9126b),
   pointer_default(unique)
 ]
 interface IEnumPStoreTypes : IUnknown
@@ -123,6 +122,7 @@ interface IEnumPStoreTypes : IUnknown
  */
 [
   object,
+  uuid(5a6f1ec0-2db1-11d0-8c39-00c04fd9126b),
   pointer_default(unique)
 ]
 interface IPStore : IUnknown
@@ -222,7 +222,7 @@ interface IPStore : IUnknown
         [in] LPCWSTR szItemName,
         [in] DWORD *cbData,
         [in] BYTE** pbData,
-        [in] PPST_PROMPTIFO pPromptInfo,
+        [in] PPST_PROMPTINFO pPromptInfo,
         [in] DWORD dwFlags );
 
     HRESULT WriteItem(
@@ -232,7 +232,7 @@ interface IPStore : IUnknown
         [in] LPCWSTR szItemName,
         [in] DWORD cbData,
         [in,size_is(cbData)] BYTE *ppbData,
-        [in] PPST_PROMPTIFO pPromptInfo,
+        [in] PPST_PROMPTINFO pPromptInfo,
         [in] DWORD dwDefaultConfirmationStyle,
         [in] DWORD dwFlags);
 
@@ -242,12 +242,12 @@ interface IPStore : IUnknown
         [in] const GUID* pItemSubtype,
         [in] LPCWSTR szItemName,
         [in] PST_ACCESSMODE ModeFlags,
-        [in] PPST_PROMPTIFO pProomptInfo,
+        [in] PPST_PROMPTINFO pProomptInfo,
         [in] DWORD dwFlags );
 
-    HRESULT CloseItem(
-        [in] PST_KEY Key,
-        [in] const GUID* pItemType,
+    HRESULT CloseItem( 
+        [in] PST_KEY Key, 
+        [in] const GUID* pItemType, 
         [in] const GUID* pItemSubtype,
         [in] LPCWSTR* szItemName,
         [in] DWORD dwFlags );