diff --git a/dlls/crtdll/crtdll.spec b/dlls/crtdll/crtdll.spec
index 7b727fa5d6f..c20debbeb97 100644
--- a/dlls/crtdll/crtdll.spec
+++ b/dlls/crtdll/crtdll.spec
@@ -407,19 +407,19 @@ init    CRTDLL_Init
 @ cdecl ispunct(long) ispunct
 @ cdecl isspace(long) isspace
 @ cdecl isupper(long) isupper
-@ stub iswalnum
-@ stub iswalpha
+@ cdecl iswalnum(long) CRTDLL_iswalnum
+@ cdecl iswalpha(long) CRTDLL_iswalpha
 @ stub iswascii
-@ stub iswcntrl
-@ stub iswctype
-@ stub iswdigit
-@ stub iswgraph
-@ stub iswlower
-@ stub iswprint
-@ stub iswpunct
-@ stub iswspace
-@ stub iswupper
-@ stub iswxdigit
+@ cdecl iswcntrl(long) CRTDLL_iswcntrl
+@ cdecl iswctype(long long) CRTDLL_iswctype
+@ cdecl iswdigit(long) CRTDLL_iswdigit
+@ cdecl iswgraph(long) CRTDLL_iswgraph
+@ cdecl iswlower(long) CRTDLL_iswlower
+@ cdecl iswprint(long) CRTDLL_iswprint
+@ cdecl iswpunct(long) CRTDLL_iswpunct
+@ cdecl iswspace(long) CRTDLL_iswspace
+@ cdecl iswupper(long) CRTDLL_iswupper
+@ cdecl iswxdigit(long) CRTDLL_iswxdigit
 @ cdecl isxdigit(long) isxdigit
 @ cdecl labs(long) labs
 @ cdecl ldexp(double long) ldexp
diff --git a/dlls/crtdll/wcstring.c b/dlls/crtdll/wcstring.c
index 23696aca69f..e4eeb0050e5 100644
--- a/dlls/crtdll/wcstring.c
+++ b/dlls/crtdll/wcstring.c
@@ -19,7 +19,9 @@
 
 #include "windef.h"
 #include "crtdll.h"
+#include "debugtools.h"
 
+DEFAULT_DEBUG_CHANNEL(crtdll);
 
 /*********************************************************************
  *           CRTDLL__wcsdup    (CRTDLL.320)
@@ -406,3 +408,173 @@ INT __cdecl CRTDLL_wctomb( LPSTR dst, WCHAR ch )
 {
     return wctomb( dst, (wchar_t)ch );
 }
+
+/*********************************************************************
+ *           CRTDLL_iswalnum    (CRTDLL.405)
+ */
+int CRTDLL_iswalnum(unsigned short wc)
+{
+#ifdef HAVE_WCTYPE_H
+#undef iswalnum
+    return iswalnum(wc);
+#else
+    return isalnum( LOBYTE(ch) );  /* FIXME */
+#endif
+}
+
+/*********************************************************************
+ *           CRTDLL_iswalpha    (CRTDLL.406)
+ */
+int CRTDLL_iswalpha(unsigned short wc)
+{
+#ifdef HAVE_WCTYPE_H
+#undef iswalpha
+    return iswalpha(wc);
+#else
+    return isalpha( LOBYTE(ch) );  /* FIXME */
+#endif
+}
+
+/*********************************************************************
+ *           CRTDLL_iswcntrl    (CRTDLL.408)
+ */
+int CRTDLL_iswcntrl(unsigned short wc)
+{
+#ifdef HAVE_WCTYPE_H
+#undef iswcntrl
+    return iswcntrl(wc);
+#else
+    return iscntrl( LOBYTE(ch) );  /* FIXME */
+#endif
+}
+
+/*********************************************************************
+ *           CRTDLL_iswctype    (CRTDLL.409)
+ */
+int CRTDLL_iswctype(unsigned short wc, unsigned short wct)
+{
+#ifdef HAVE_WCTYPE_H
+    wctype_t mask = 0;
+
+    if (wct & 0x0001)	mask |= _ISwupper;
+    if (wct & 0x0002)	mask |= _ISwlower;
+    if (wct & 0x0004)	mask |= _ISwdigit;
+    if (wct & 0x0008)	mask |= _ISwspace;
+    if (wct & 0x0010)	mask |= _ISwpunct;
+    if (wct & 0x0020)	mask |= _ISwcntrl;
+    if (wct & 0x0040)	mask |= _ISwblank;
+    if (wct & 0x0080)	mask |= _ISwxdigit;
+    if (wct & 0x0100)	mask |= _ISwalpha;
+    if (wct & 0x8000)
+	FIXME(": iswctype(%04hx,_LEADBYTE|...) requested\n",wc);
+
+#undef iswctype
+    return iswctype(wc,mask);
+#else
+    FIXME(":(%ld,%p): iswctype() not supported\n",hand,x2);
+#endif
+}
+
+/*********************************************************************
+ *           CRTDLL_iswdigit    (CRTDLL.410)
+ */
+int CRTDLL_iswdigit(unsigned short wc)
+{
+#ifdef HAVE_WCTYPE_H
+#undef iswdigit
+    return iswdigit(wc);
+#else
+    return isdigit( LOBYTE(ch) );  /* FIXME */
+#endif
+}
+
+/*********************************************************************
+ *           CRTDLL_iswgraph    (CRTDLL.411)
+ */
+int CRTDLL_iswgraph(unsigned short wc)
+{
+#ifdef HAVE_WCTYPE_H
+#undef iswgraph
+    return iswgraph(wc);
+#else
+    return isgraph( LOBYTE(ch) );  /* FIXME */
+#endif
+}
+
+/*********************************************************************
+ *           CRTDLL_iswlower    (CRTDLL.412)
+ */
+int CRTDLL_iswlower(unsigned short wc)
+{
+#ifdef HAVE_WCTYPE_H
+#undef iswlower
+    return iswlower(wc);
+#else
+    return islower( LOBYTE(ch) );  /* FIXME */
+#endif
+}
+
+/*********************************************************************
+ *           CRTDLL_iswprint    (CRTDLL.413)
+ */
+int CRTDLL_iswprint(unsigned short wc)
+{
+#ifdef HAVE_WCTYPE_H
+#undef iswprint
+    return iswprint(wc);
+#else
+    return isprint( LOBYTE(ch) );  /* FIXME */
+#endif
+}
+
+/*********************************************************************
+ *           CRTDLL_iswpunct    (CRTDLL.414)
+ */
+int CRTDLL_iswpunct(unsigned short wc)
+{
+#ifdef HAVE_WCTYPE_H
+#undef iswpunct
+    return iswpunct(wc);
+#else
+    return ispunct( LOBYTE(ch) );  /* FIXME */
+#endif
+}
+
+/*********************************************************************
+ *           CRTDLL_iswspace    (CRTDLL.415)
+ */
+int CRTDLL_iswspace(unsigned short wc)
+{
+#ifdef HAVE_WCTYPE_H
+#undef iswspace
+    return iswspace(wc);
+#else
+    return isspace( LOBYTE(ch) );  /* FIXME */
+#endif
+}
+
+/*********************************************************************
+ *           CRTDLL_iswupper    (CRTDLL.416)
+ */
+int CRTDLL_iswupper(unsigned short wc)
+{
+#ifdef HAVE_WCTYPE_H
+#undef iswupper
+    return iswupper(wc);
+#else
+    return isupper( LOBYTE(ch) );  /* FIXME */
+#endif
+}
+
+/*********************************************************************
+ *           CRTDLL_iswxdigit    (CRTDLL.417)
+ */
+int CRTDLL_iswxdigit(unsigned short wc)
+{
+#ifdef HAVE_WCTYPE_H
+#undef iswxdigit
+    return iswxdigit(wc);
+#else
+    return isxdigit( LOBYTE(ch) );  /* FIXME */
+#endif
+}
diff --git a/dlls/ntdll/ntdll.spec b/dlls/ntdll/ntdll.spec
index 58e013e4589..49176d58f87 100644
--- a/dlls/ntdll/ntdll.spec
+++ b/dlls/ntdll/ntdll.spec
@@ -901,8 +901,8 @@ type	win32
 @ cdecl isprint(long) isprint
 @ cdecl isspace(long) isspace
 @ cdecl isupper(long) isupper
-@ stub iswalpha
-@ stub iswctype
+@ cdecl iswalpha(long) CRTDLL_iswalpha
+@ cdecl iswctype(long long) CRTDLL_iswctype
 @ cdecl isxdigit(long) isxdigit
 @ stub labs
 @ stub log