comctl32: Add support for adding extra data in CreatePropertySheetPage.

dlls/comctl32/propsheet.c

@@ -103,6 +103,7 @@ struct _PSP
     {
         PROPSHEETPAGEA pspA;
         PROPSHEETPAGEW pspW;
+        BYTE data[1];
     };
 };
 
@@ -3076,10 +3077,10 @@ HPROPSHEETPAGE WINAPI CreatePropertySheetPageA(
     if (lpPropSheetPage->dwSize < PROPSHEETPAGEA_V1_SIZE)
         return NULL;
 
-    ret = Alloc(sizeof(*ret));
+    ret = Alloc(FIELD_OFFSET(struct _PSP, data[lpPropSheetPage->dwSize]));
     ret->magic = HPROPSHEETPAGE_MAGIC;
     ppsp = &ret->pspA;
-    memcpy(ppsp, lpPropSheetPage, min(lpPropSheetPage->dwSize, sizeof(PROPSHEETPAGEA)));
+    memcpy(ppsp, lpPropSheetPage, lpPropSheetPage->dwSize);
 
     if ( !(ppsp->dwFlags & PSP_DLGINDIRECT) )
     {
@@ -3131,11 +3132,11 @@ HPROPSHEETPAGE WINAPI CreatePropertySheetPageW(LPCPROPSHEETPAGEW lpPropSheetPage
     if (lpPropSheetPage->dwSize < PROPSHEETPAGEW_V1_SIZE)
         return NULL;
 
-    ret = Alloc(sizeof(*ret));
+    ret = Alloc(FIELD_OFFSET(struct _PSP, data[lpPropSheetPage->dwSize]));
     ret->magic = HPROPSHEETPAGE_MAGIC;
     ret->unicode = TRUE;
     ppsp = &ret->pspW;
-    memcpy(ppsp, lpPropSheetPage, min(lpPropSheetPage->dwSize, sizeof(PROPSHEETPAGEW)));
+    memcpy(ppsp, lpPropSheetPage, lpPropSheetPage->dwSize);
 
     if ( !(ppsp->dwFlags & PSP_DLGINDIRECT) )
     {

dlls/comctl32/tests/propsheet.c

@@ -1058,7 +1058,7 @@ static UINT CALLBACK proppage_callback_a(HWND hwnd, UINT msg, PROPSHEETPAGEA *ps
     if (psp->dwSize >= FIELD_OFFSET(struct custom_proppage, addref_called))
     {
         struct custom_proppage *extra_data = (struct custom_proppage *)psp;
-        todo_wine ok(extra_data->extra_data == 0x1234, "Expected extra_data to be preserved, got %lx\n",
+        ok(extra_data->extra_data == 0x1234, "Expected extra_data to be preserved, got %lx\n",
                 extra_data->extra_data);
     }
 
@@ -1092,7 +1092,7 @@ static UINT CALLBACK proppage_callback_w(HWND hwnd, UINT msg, PROPSHEETPAGEW *ps
     if (psp->dwSize >= FIELD_OFFSET(struct custom_proppage, addref_called))
     {
         struct custom_proppage *extra_data = (struct custom_proppage *)psp;
-        todo_wine ok(extra_data->extra_data == 0x4321, "Expected extra_data to be preserved, got %lx\n",
+        ok(extra_data->extra_data == 0x4321, "Expected extra_data to be preserved, got %lx\n",
                 extra_data->extra_data);
     }