Index: /trunk/src/VBox/Devices/Samples/DrvStorageFilter.cpp
===================================================================
--- /trunk/src/VBox/Devices/Samples/DrvStorageFilter.cpp	(revision 40378)
+++ /trunk/src/VBox/Devices/Samples/DrvStorageFilter.cpp	(revision 40379)
@@ -183,6 +183,6 @@
 {
     PDRVSTORAGEFILTER pThis = RT_FROM_MEMBER(pInterface, DRVSTORAGEFILTER, IMedia);
-    int rc = pThis->pIMediaBelow->pfnGetSize(pThis->pIMediaBelow);
-    return rc;
+    uint64_t cb = pThis->pIMediaBelow->pfnGetSize(pThis->pIMediaBelow);
+    return cb;
 }
 
@@ -191,6 +191,6 @@
 {
     PDRVSTORAGEFILTER pThis = RT_FROM_MEMBER(pInterface, DRVSTORAGEFILTER, IMedia);
-    int rc = pThis->pIMediaBelow->pfnIsReadOnly(pThis->pIMediaBelow);
-    return rc;
+    bool fRc = pThis->pIMediaBelow->pfnIsReadOnly(pThis->pIMediaBelow);
+    return fRc;
 }