Index: shell32.spec
===================================================================
--- shell32.spec	(revision 43932)
+++ shell32.spec	(working copy)
@@ -332,7 +332,7 @@
 332 stdcall SHQueryRecycleBinA(str ptr)
 333 stdcall SHQueryRecycleBinW(wstr ptr)
 334 stdcall SHSetLocalizedName(wstr wstr long)
-335 stub SHSetUnreadMailCountW
+335 stdcall SHSetUnreadMailCountW (wstr long wstr)
 336 stdcall SHUpdateRecycleBinIcon()
 337 stdcall SheChangeDirA(str)
 338 stdcall SheChangeDirExA(str)
Index: stubs.c
===================================================================
--- stubs.c	(revision 43932)
+++ stubs.c	(working copy)
@@ -134,6 +134,19 @@
 /*
  * Unimplemented
  */
+HRESULT
+WINAPI
+SHSetUnreadMailCountW(LPCTSTR pszMailAddress,
+                      DWORD dwCount,
+                      LPCTSTR pszShellExecuteCommand)
+{
+    FIXME("SHSetUnreadMailCountW() stub\n");
+    return E_OUTOFMEMORY;
+}
+
+/*
+ * Unimplemented
+ */
 VOID
 WINAPI
 CheckDiskSpace(VOID)