diff --git a/btree_standardVFS.cpp b/btree_standardVFS.cpp
index 34b497e..9db223a 100644
--- a/btree_standardVFS.cpp
+++ b/btree_standardVFS.cpp
@@ -4,11 +4,16 @@
 
 
 StandardVFS::StandardVFS(void) { 
+  dataFile = NULL;
+  openFile = false;
 } // StandardVFS::StandardVFS
 
 bool  
 StandardVFS::fClose(void) { 
-  return false;
+  int result = 0;                           // failure by default;
+  if (openFile) result = fclose(dataFile);  // if open close it
+  openFile = (result == 0);                 // was it closed properly?
+  return result;                            // return true if closed
 } // StandardVFS::fClose
 
 bool  
@@ -27,7 +32,7 @@
 } // StandardVFS::fOpen
 
 bool  
-StandardVFS::fRead(const char *) { 
+StandardVFS::fRead(void *, uInt32) { 
   return false; 
 } // StandardVFS::fRead
 
diff --git a/btree_standardVFS.h b/btree_standardVFS.h
index 247159e..44079b2 100644
--- a/btree_standardVFS.h
+++ b/btree_standardVFS.h
@@ -5,13 +5,16 @@
 #include "btree_vfs.h"
 
 class StandardVFS : bTreeVFS {
+ protected:
+  FILE * dataFile;
+  bool   openFile;
  public:
                 StandardVFS(void);
   virtual bool  fClose(void);
   virtual bool  fCreate(const char *);
   virtual bool  fExist(const char *);
   virtual bool  fOpen(const char *);
-  virtual bool  fRead(const char *);
+  virtual bool  fRead(void *, uInt32);
   virtual bool  fSeek(uInt32);
   virtual bool  fWrite(void *, uInt32);
   virtual       ~StandardVFS(void);
diff --git a/btree_vfs.h b/btree_vfs.h
index fbb6d63..3c1a36e 100644
--- a/btree_vfs.h
+++ b/btree_vfs.h
@@ -10,7 +10,7 @@
   virtual bool  fCreate(const char *) = 0;
   virtual bool  fExist(const char *) = 0;
   virtual bool  fOpen(const char *) = 0;
-  virtual bool  fRead(const char *) = 0;
+  virtual bool  fRead(void *, uInt32) = 0;
   virtual bool  fSeek(uInt32) = 0;
   virtual bool  fWrite(void *, uInt32) = 0;
   virtual      ~bTreeVFS(void) = 0;