diff --git a/dlls/crtdll/crtdll.h b/dlls/crtdll/crtdll.h
index a7f1cd46d01..8f4caa690cb 100644
--- a/dlls/crtdll/crtdll.h
+++ b/dlls/crtdll/crtdll.h
@@ -61,6 +61,16 @@
 /* windows.h RAND_MAX is smaller than normal RAND_MAX */
 #define CRTDLL_RAND_MAX         0x7fff
 
+/* heap function constants */
+#define _HEAPEMPTY    -1
+#define _HEAPOK       -2
+#define _HEAPBADBEGIN -3
+#define _HEAPBADNODE  -4
+#define _HEAPEND      -5
+#define _HEAPBADPTR   -6
+#define _FREEENTRY    0
+#define _USEDENTRY    1
+
 /* CRTDLL Globals */
 extern INT  CRTDLL_doserrno;
 extern INT  CRTDLL_errno;
@@ -153,6 +163,13 @@ struct complex
   double imaginary;
 };
 
+typedef struct _heapinfo
+{
+  int * _pentry;
+  size_t _size;
+  int    _useflag;
+} _HEAPINFO;
+
 typedef VOID (*sig_handler_type)(VOID);
 
 typedef VOID (*new_handler_type)(VOID);
@@ -308,6 +325,10 @@ LPVOID __cdecl CRTDLL__lsearch( LPVOID match, LPVOID start, LPUINT array_size,
 LPVOID  __cdecl CRTDLL_new( DWORD size );
 VOID   __cdecl CRTDLL_delete( LPVOID ptr );
 new_handler_type __cdecl CRTDLL_set_new_handler( new_handler_type func );
+INT    __cdecl CRTDLL__heapchk( VOID );
+INT    __cdecl CRTDLL__heapmin( VOID );
+INT    __cdecl CRTDLL__heapset( UINT value );
+INT    __cdecl CRTDLL__heapwalk( struct _heapinfo *next );
 LPVOID __cdecl CRTDLL__expand( LPVOID ptr, INT size );
 LONG   __cdecl CRTDLL__msize( LPVOID mem );
 LPVOID __cdecl CRTDLL_calloc( DWORD size, DWORD count );
@@ -323,6 +344,7 @@ INT    __cdecl CRTDLL_system( LPSTR x );
 LPSTR  __cdecl CRTDLL__strdec( LPSTR str1, LPSTR str2 );
 LPSTR  __cdecl CRTDLL__strdup( LPCSTR ptr );
 LPSTR  __cdecl CRTDLL__strinc( LPSTR str );
+UINT   __cdecl CRTDLL__strnextc( LPCSTR str );
 LPSTR  __cdecl CRTDLL__strninc( LPSTR str, INT n );
 LPSTR  __cdecl CRTDLL__strnset( LPSTR str, INT c, INT len );
 LPSTR  __cdecl CRTDLL__strrev ( LPSTR str );
diff --git a/dlls/crtdll/crtdll.spec b/dlls/crtdll/crtdll.spec
index 06344357517..02d9a1d4dc5 100644
--- a/dlls/crtdll/crtdll.spec
+++ b/dlls/crtdll/crtdll.spec
@@ -137,10 +137,10 @@ debug_channels (crtdll)
 @ stub _getsystime
 @ stub _getw
 @ cdecl _global_unwind2(ptr) CRTDLL__global_unwind2
-@ stub _heapchk
-@ stub _heapmin
-@ stub _heapset
-@ stub _heapwalk
+@ cdecl _heapchk() CRTDLL__heapchk
+@ cdecl _heapmin() CRTDLL__heapmin
+@ cdecl _heapset(long) CRTDLL__heapset
+@ cdecl _heapwalk(ptr) CRTDLL__heapwalk
 @ cdecl _hypot(double double) hypot
 @ cdecl _initterm(ptr ptr) CRTDLL__initterm
 @ extern _iob __CRTDLL_iob
@@ -174,9 +174,9 @@ debug_channels (crtdll)
 @ cdecl _isnan(double) CRTDLL__isnan
 @ forward _itoa ntdll._itoa
 @ cdecl _itow(long str long) CRTDLL__itow
-@ cdecl _j0(double) CRTDLL__j0
-@ cdecl _j1(double) CRTDLL__j1
-@ cdecl _jn(long double) CRTDLL__jn
+@ cdecl _j0(double) j0
+@ cdecl _j1(double) j1
+@ cdecl _jn(long double) jn
 @ stub _kbhit
 @ stub _lfind
 @ cdecl _loaddll(str) CRTDLL__loaddll
@@ -299,7 +299,7 @@ debug_channels (crtdll)
 @ cdecl _strinc(str) CRTDLL__strinc
 @ forward _strlwr ntdll._strlwr
 @ cdecl _strncnt(str long) CRTDLL__strncnt
-@ stub _strnextc
+@ cdecl _strnextc(str) CRTDLL__strnextc
 @ cdecl _strnicmp(str str long) strncasecmp
 @ cdecl _strninc(str long) CRTDLL__strninc
 @ cdecl _strnset(str long long) CRTDLL__strnset
diff --git a/dlls/crtdll/crtdll_main.c b/dlls/crtdll/crtdll_main.c
index 7422e3b3d75..86c51375485 100644
--- a/dlls/crtdll/crtdll_main.c
+++ b/dlls/crtdll/crtdll_main.c
@@ -545,7 +545,7 @@ LPINT __cdecl CRTDLL__errno( VOID )
 
 
 /*********************************************************************
- *                  _doserrno           (CRTDLL.26)
+ *                  __doserrno       (CRTDLL.26)
  * 
  * Return the address of the DOS errno (holding the last OS error).
  *
@@ -1022,31 +1022,3 @@ INT __cdecl  CRTDLL__isnan(double d)
    */
   return isnan(d)?1:0;
 }
-
-
-/*********************************************************************
- *                  _j0           (CRTDLL.166)
- */
-double CRTDLL__j0(double x)
-{
-  FIXME(":stub!\n");
-  return x;
-}
-
-/*********************************************************************
- *                  _j1           (CRTDLL.167)
- */
-double CRTDLL__j1(double x)
-{
-  FIXME(":stub!\n");
-  return x;
-}
-
-/*********************************************************************
- *                  _jn           (CRTDLL.168)
- */
-double CRTDLL__jn(LONG x,double y)
-{
-  FIXME(":stub!\n");
-  return x;
-}
diff --git a/dlls/crtdll/file.c b/dlls/crtdll/file.c
index bcad9951b5f..ea4edbf5fa0 100644
--- a/dlls/crtdll/file.c
+++ b/dlls/crtdll/file.c
@@ -278,13 +278,14 @@ INT __cdecl CRTDLL__commit(INT fd)
 
 
 /*********************************************************************
- *                  _creat     (CRTDLL.66)
+ *                  _creat         (CRTDLL.066)
  *
  * Open a file, creating it if it is not present.
  */
 INT __cdecl CTRDLL__creat(LPCSTR path, INT flags)
 {
-  return CRTDLL__open(path,_O_CREAT|_O_WRONLY|_O_TRUNC);
+  INT usedFlags = (flags & _O_TEXT)| _O_CREAT| _O_WRONLY| _O_TRUNC;
+  return CRTDLL__open(path, usedFlags);
 }
 
 
diff --git a/dlls/crtdll/memory.c b/dlls/crtdll/memory.c
index b6192e047fb..89a80908467 100644
--- a/dlls/crtdll/memory.c
+++ b/dlls/crtdll/memory.c
@@ -8,6 +8,9 @@
  *
  * Implementation Notes:
  * MT Safe.
+ * heapwalk from win does not work. This is most likely due to internal
+ * differences between wine and win (see memory/heap.c comments). This
+ * version works fine, however.
  */
 
 #include "crtdll.h"
@@ -66,6 +69,100 @@ LPVOID __cdecl CRTDLL__expand(LPVOID ptr, INT size)
 }
 
 
+/*********************************************************************
+ *                  _heapchk        (CRTDLL.130)
+ *
+ * Check the consistency of the process heap.
+ */
+INT __cdecl CRTDLL__heapchk(VOID)
+{
+  if (!HeapValidate( GetProcessHeap(), 0, NULL))
+  {
+    __CRTDLL__set_errno(GetLastError());
+    return _HEAPBADNODE;
+  }
+  return _HEAPOK;
+}
+
+
+/*********************************************************************
+ *                  _heapmin        (CRTDLL.131)
+ *
+ * Minimise the size of the heap.
+ */
+INT __cdecl CRTDLL__heapmin(VOID)
+{
+  if (!HeapCompact( GetProcessHeap(), 0 ))
+  {
+    if (GetLastError() != ERROR_CALL_NOT_IMPLEMENTED)
+      __CRTDLL__set_errno(GetLastError());
+    return -1;
+  }
+  return 0;
+}
+
+
+/*********************************************************************
+ *                  _heapset        (CRTDLL.132)
+ *
+ * Fill free memory in the heap with a given value.
+ */
+INT __cdecl CRTDLL__heapset(UINT value)
+{
+  INT retVal;
+  struct _heapinfo heap;
+
+  memset( &heap, 0, sizeof(heap) );
+
+  while ((retVal = CRTDLL__heapwalk(&heap)) == _HEAPOK)
+  {
+    if (heap._useflag == _FREEENTRY)
+      memset(heap._pentry, value, heap._size);
+  }
+  return retVal == _HEAPEND? _HEAPOK : retVal;
+}
+
+
+/*********************************************************************
+ *                  _heapwalk        (CRTDLL.133)
+ *
+ * Walk the heap block by block.
+ */
+INT __cdecl CRTDLL__heapwalk(struct _heapinfo *next)
+{
+  PROCESS_HEAP_ENTRY phe;
+
+  phe.lpData = next->_pentry;
+  phe.cbData = next->_size;
+  phe.wFlags = next->_useflag == _USEDENTRY ? PROCESS_HEAP_ENTRY_BUSY : 0;
+
+  if (phe.lpData && phe.wFlags & PROCESS_HEAP_ENTRY_BUSY && 
+      !HeapValidate( GetProcessHeap(), 0, phe.lpData ))
+  {
+    __CRTDLL__set_errno(GetLastError());
+    return _HEAPBADNODE;
+  }
+
+  do
+  {
+    if (!HeapWalk( GetProcessHeap(), &phe ))
+    {
+      if (GetLastError() == ERROR_NO_MORE_ITEMS)
+        return _HEAPEND;
+      __CRTDLL__set_errno(GetLastError());
+      if (!phe.lpData)
+        return _HEAPBADBEGIN;
+      return _HEAPBADNODE;
+    }
+  } while (phe.wFlags & (PROCESS_HEAP_REGION|PROCESS_HEAP_UNCOMMITTED_RANGE));
+
+  next->_pentry = phe.lpData;
+  next->_size = phe.cbData;
+  next->_useflag = phe.wFlags & PROCESS_HEAP_ENTRY_BUSY ? _USEDENTRY : _FREEENTRY;
+  return _HEAPOK;
+}
+
+
 /*********************************************************************
  *                  _msize     (CRTDLL.234)
  *
diff --git a/dlls/crtdll/string.c b/dlls/crtdll/string.c
index 1e5099e6f66..383d780bf6f 100644
--- a/dlls/crtdll/string.c
+++ b/dlls/crtdll/string.c
@@ -86,6 +86,17 @@ LPSTR __cdecl CRTDLL__strinc(LPSTR str)
 }
 
 
+/*********************************************************************
+ *                   _strnextc         (CRTDLL.290)
+ *
+ * Return an unsigned int from a string.
+ */
+UINT __cdecl CRTDLL__strnextc(LPCSTR str)
+{
+  return (UINT)*str;
+}
+
+
 /*********************************************************************
  *                  _strninc           (CRTDLL.292)
  *
diff --git a/tools/winapi_check/win32/crtdll.api b/tools/winapi_check/win32/crtdll.api
index bc898a4c359..b62b1481e8b 100644
--- a/tools/winapi_check/win32/crtdll.api
+++ b/tools/winapi_check/win32/crtdll.api
@@ -51,6 +51,7 @@ struct _stat *
 struct win_stat *
 struct _timeb *
 time_t *
+struct _heapinfo *
 fpos_t *
 diskfree_t *
 unsigned char *