shell32: Stub ShellHookProc.

dlls/shell32/shell32.spec

@@ -408,7 +408,7 @@
 @ stdcall ShellExecuteExA (long)
 @ stdcall ShellExecuteExW (long)
 @ stdcall ShellExecuteW (long wstr wstr wstr wstr long)
-@ stub ShellHookProc
+@ stdcall ShellHookProc(long long long)
 @ stdcall Shell_NotifyIcon(long ptr) Shell_NotifyIconA
 @ stdcall Shell_NotifyIconA(long ptr)
 @ stdcall Shell_NotifyIconW(long ptr)

dlls/shell32/shell32_main.c

@@ -1220,3 +1220,12 @@ BOOL WINAPI InitNetworkAddressControl(void)
     FIXME("stub\n");
     return FALSE;
 }
+
+/***********************************************************************
+ *              ShellHookProc (SHELL32.@)
+ */
+LRESULT CALLBACK ShellHookProc(DWORD a, DWORD b, DWORD c)
+{
+    FIXME("Stub\n");
+    return 0;
+}