diff --git a/wfassoc-cdylib/codegen/wfassoc.h b/wfassoc-cdylib/codegen/wfassoc.h
index 76e0845..3c99452 100644
--- a/wfassoc-cdylib/codegen/wfassoc.h
+++ b/wfassoc-cdylib/codegen/wfassoc.h
@@ -23,6 +23,15 @@ typedef void *HICON;
 #endif  // __cplusplus
 
 
+#ifdef __cplusplus
+constexpr HICON INVALID_HICON = nullptr;
+constexpr size_t INVALID_INDEX = static_cast<size_t>(-1);
+#else  // __cplusplus
+static const HICON INVALID_HICON = NULL;
+static const size_t INVALID_INDEX = ((size_t)-1);
+#endif  // __cplusplus
+
+
 #ifdef __cplusplus
 enum class Scope : uint32_t {
     User = 0u,
@@ -91,6 +100,16 @@ bool WFProgramCreate(Token in_schema, Token *out_program);
 
 bool WFProgramDestroy(Token in_program);
 
+bool WFProgramResolveName(Token in_program, CStyleString *out_name);
+
+bool WFProgramResolveIcon(Token in_program, Token *out_icon_rc);
+
+bool WFProgramExtsLen(Token in_program, size_t *out_len);
+
+bool WFProgramGetExt(Token in_program, size_t in_index, Token *out_ext);
+
+bool WFProgramFindExt(Token in_program, CStyleString in_body, size_t *out_index);
+
 bool WFProgramRegister(Token in_program, Scope in_scope);
 
 bool WFProgramUnregister(Token in_program, Scope in_scope);
@@ -109,6 +128,16 @@ bool WFExtStatusGetName(Token in_ext_status, CStyleString *out_name);
 
 bool WFExtStatusGetIcon(Token in_ext_status, HICON *out_icon);
 
+bool WFIconRcDestroy(Token in_icon_rc);
+
+bool WFIconRcGetIcon(Token in_icon_rc, HICON *out_icon);
+
+bool WFExtDestroy(Token in_ext);
+
+bool WFExtGetInner(Token in_ext, CStyleString *out_inner);
+
+bool WFExtGetDottedInner(Token in_ext, CStyleString *out_inner);
+
 #ifdef __cplusplus
 }  // extern "C"
 }  // namespace wfassoc