diff --git a/sdk/include/crt/corecrt.h b/sdk/include/crt/corecrt.h
index 4bae8184255c8..d50f160aa98c7 100644
--- a/sdk/include/crt/corecrt.h
+++ b/sdk/include/crt/corecrt.h
@@ -1,3 +1,9 @@
+/*
+ * PROJECT:     ReactOS CRT headers
+ * LICENSE:     MIT (https://spdx.org/licenses/MIT)
+ * PURPOSE:     Declarations used throughout the CoreCRT library.
+ * COPYRIGHT:   Copyright (c) Microsoft Corporation. All rights reserved.
+ */
 
 #pragma once
 
@@ -20,6 +26,169 @@ typedef struct localeinfo_struct
 #define DEFINED_localeinfo_struct 1
 #endif
 
+#ifndef RC_INVOKED
+    #if defined __cplusplus && _CRT_SECURE_CPP_OVERLOAD_SECURE_NAMES
+
+        #define __DEFINE_CPP_OVERLOAD_SECURE_FUNC_0_0(_ReturnType, _FuncName, _DstType, _Dst)     \
+            extern "C++"                                                                          \
+            {                                                                                     \
+                template <size_t _Size>                                                           \
+                inline                                                                            \
+                _ReturnType __CRTDECL _FuncName(_DstType (&_Dst)[_Size]) _CRT_SECURE_CPP_NOTHROW  \
+                {                                                                                 \
+                    return _FuncName(_Dst, _Size);                                                \
+                }                                                                                 \
+            }
+
+        #define __DEFINE_CPP_OVERLOAD_SECURE_FUNC_0_1(_ReturnType, _FuncName, _DstType, _Dst, _TType1, _TArg1)   \
+            extern "C++"                                                                                         \
+            {                                                                                                    \
+                template <size_t _Size>                                                                          \
+                inline                                                                                           \
+                _ReturnType __CRTDECL _FuncName(_DstType (&_Dst)[_Size], _TType1 _TArg1) _CRT_SECURE_CPP_NOTHROW \
+                {                                                                                                \
+                    return _FuncName(_Dst, _Size, _TArg1);                                                       \
+                }                                                                                                \
+            }
+
+        #define __DEFINE_CPP_OVERLOAD_SECURE_FUNC_0_2(_ReturnType, _FuncName, _DstType, _Dst, _TType1, _TArg1, _TType2, _TArg2)  \
+            extern "C++"                                                                                                         \
+            {                                                                                                                    \
+                template <size_t _Size>                                                                                          \
+                inline                                                                                                           \
+                _ReturnType __CRTDECL _FuncName(_DstType (&_Dst)[_Size], _TType1 _TArg1, _TType2 _TArg2) _CRT_SECURE_CPP_NOTHROW \
+                {                                                                                                                \
+                    return _FuncName(_Dst, _Size, _TArg1, _TArg2);                                                               \
+                }                                                                                                                \
+            }
+
+        #define __DEFINE_CPP_OVERLOAD_SECURE_FUNC_0_3(_ReturnType, _FuncName, _DstType, _Dst, _TType1, _TArg1, _TType2, _TArg2, _TType3, _TArg3) \
+            extern "C++"                                                                                                                         \
+            {                                                                                                                                    \
+                template <size_t _Size>                                                                                                          \
+                inline                                                                                                                           \
+                _ReturnType __CRTDECL _FuncName(_DstType (&_Dst)[_Size], _TType1 _TArg1, _TType2 _TArg2, _TType3 _TArg3) _CRT_SECURE_CPP_NOTHROW \
+                {                                                                                                                                \
+                    return _FuncName(_Dst, _Size, _TArg1, _TArg2, _TArg3);                                                                       \
+                }                                                                                                                                \
+            }
+
+        #define __DEFINE_CPP_OVERLOAD_SECURE_FUNC_0_4(_ReturnType, _FuncName, _DstType, _Dst, _TType1, _TArg1, _TType2, _TArg2, _TType3, _TArg3, _TType4, _TArg4) \
+            extern "C++"                                                                                                                                          \
+            {                                                                                                                                                     \
+                template <size_t _Size>                                                                                                                           \
+                inline                                                                                                                                            \
+                _ReturnType __CRTDECL _FuncName(_DstType (&_Dst)[_Size], _TType1 _TArg1, _TType2 _TArg2, _TType3 _TArg3, _TType4 _TArg4) _CRT_SECURE_CPP_NOTHROW  \
+                {                                                                                                                                                 \
+                    return _FuncName(_Dst, _Size, _TArg1, _TArg2, _TArg3, _TArg4);                                                                                \
+                }                                                                                                                                                 \
+            }
+
+        #define __DEFINE_CPP_OVERLOAD_SECURE_FUNC_1_1(_ReturnType, _FuncName, _HType1, _HArg1, _DstType, _Dst, _TType1, _TArg1)  \
+            extern "C++"                                                                                                         \
+            {                                                                                                                    \
+                template <size_t _Size>                                                                                          \
+                inline                                                                                                           \
+                _ReturnType __CRTDECL _FuncName(_HType1 _HArg1, _DstType (&_Dst)[_Size], _TType1 _TArg1) _CRT_SECURE_CPP_NOTHROW \
+                {                                                                                                                \
+                    return _FuncName(_HArg1, _Dst, _Size, _TArg1);                                                               \
+                }                                                                                                                \
+            }
+
+        #define __DEFINE_CPP_OVERLOAD_SECURE_FUNC_1_2(_ReturnType, _FuncName, _HType1, _HArg1, _DstType, _Dst, _TType1, _TArg1, _TType2, _TArg2) \
+            extern "C++"                                                                                                                         \
+            {                                                                                                                                    \
+                template <size_t _Size>                                                                                                          \
+                inline                                                                                                                           \
+                _ReturnType __CRTDECL _FuncName(_HType1 _HArg1, _DstType (&_Dst)[_Size], _TType1 _TArg1, _TType2 _TArg2) _CRT_SECURE_CPP_NOTHROW \
+                {                                                                                                                                \
+                    return _FuncName(_HArg1, _Dst, _Size, _TArg1, _TArg2);                                                                       \
+                }                                                                                                                                \
+            }
+
+        #define __DEFINE_CPP_OVERLOAD_SECURE_FUNC_1_3(_ReturnType, _FuncName, _HType1, _HArg1, _DstType, _Dst, _TType1, _TArg1, _TType2, _TArg2, _TType3, _TArg3) \
+            extern "C++"                                                                                                                                          \
+            {                                                                                                                                                     \
+                template <size_t _Size>                                                                                                                           \
+                inline                                                                                                                                            \
+                _ReturnType __CRTDECL _FuncName(_HType1 _HArg1, _DstType (&_Dst)[_Size], _TType1 _TArg1, _TType2 _TArg2, _TType3 _TArg3) _CRT_SECURE_CPP_NOTHROW  \
+                {                                                                                                                                                 \
+                    return _FuncName(_HArg1, _Dst, _Size, _TArg1, _TArg2, _TArg3);                                                                                \
+                }                                                                                                                                                 \
+            }
+
+        #define __DEFINE_CPP_OVERLOAD_SECURE_FUNC_2_0(_ReturnType, _FuncName, _HType1, _HArg1, _HType2, _HArg2, _DstType, _Dst)  \
+            extern "C++"                                                                                                         \
+            {                                                                                                                    \
+                template <size_t _Size>                                                                                          \
+                inline                                                                                                           \
+                _ReturnType __CRTDECL _FuncName(_HType1 _HArg1, _HType2 _HArg2, _DstType (&_Dst)[_Size]) _CRT_SECURE_CPP_NOTHROW \
+                {                                                                                                                \
+                    return _FuncName(_HArg1, _HArg2, _Dst, _Size);                                                               \
+                }                                                                                                                \
+            }
+
+        #define __DEFINE_CPP_OVERLOAD_SECURE_FUNC_0_1_ARGLIST(_ReturnType, _FuncName, _VFuncName, _DstType, _Dst, _TType1, _TArg1) \
+            extern "C++"                                                                                                           \
+            {                                                                                                                      \
+                template <size_t _Size>                                                                                            \
+                inline                                                                                                             \
+                _ReturnType __CRTDECL _FuncName(_DstType (&_Dst)[_Size], _TType1 _TArg1, ...) _CRT_SECURE_CPP_NOTHROW              \
+                {                                                                                                                  \
+                    va_list _ArgList;                                                                                              \
+                    __crt_va_start(_ArgList, _TArg1);                                                                              \
+                    return _VFuncName(_Dst, _Size, _TArg1, _ArgList);                                                              \
+                }                                                                                                                  \
+            }
+
+        #define __DEFINE_CPP_OVERLOAD_SECURE_FUNC_0_2_ARGLIST(_ReturnType, _FuncName, _VFuncName, _DstType, _Dst, _TType1, _TArg1, _TType2, _TArg2) \
+            extern "C++"                                                                                                                            \
+            {                                                                                                                                       \
+                template <size_t _Size>                                                                                                             \
+                inline                                                                                                                              \
+                _ReturnType __CRTDECL _FuncName(_DstType (&_Dst)[_Size], _TType1 _TArg1, _TType2 _TArg2, ...) _CRT_SECURE_CPP_NOTHROW               \
+                {                                                                                                                                   \
+                    va_list _ArgList;                                                                                                               \
+                    __crt_va_start(_ArgList, _TArg2);                                                                                               \
+                    return _VFuncName(_Dst, _Size, _TArg1, _TArg2, _ArgList);                                                                       \
+                }                                                                                                                                   \
+            }
+
+        #define __DEFINE_CPP_OVERLOAD_SECURE_FUNC_SPLITPATH(_ReturnType, _FuncName, _DstType, _Src)               \
+            extern "C++"                                                                                          \
+            {                                                                                                     \
+                template <size_t _DriveSize, size_t _DirSize, size_t _NameSize, size_t _ExtSize>                  \
+                inline                                                                                            \
+                _ReturnType __CRTDECL _FuncName(                                                                  \
+                    _In_z_ _DstType const* _Src,                                                                  \
+                    _Post_z_ _DstType (&_Drive)[_DriveSize],                                                      \
+                    _Post_z_ _DstType (&_Dir)[_DirSize],                                                          \
+                    _Post_z_ _DstType (&_Name)[_NameSize],                                                        \
+                    _Post_z_ _DstType (&_Ext)[_ExtSize]                                                           \
+                    ) _CRT_SECURE_CPP_NOTHROW                                                                     \
+                {                                                                                                 \
+                    return _FuncName(_Src, _Drive, _DriveSize, _Dir, _DirSize, _Name, _NameSize, _Ext, _ExtSize); \
+                }                                                                                                 \
+            }
+
+    #else  // ^^^ _CRT_SECURE_CPP_OVERLOAD_SECURE_NAMES ^^^ // vvv !_CRT_SECURE_CPP_OVERLOAD_SECURE_NAMES vvv //
+
+        #define __DEFINE_CPP_OVERLOAD_SECURE_FUNC_0_0(_ReturnType, _FuncName, _DstType, _Dst)
+        #define __DEFINE_CPP_OVERLOAD_SECURE_FUNC_0_1(_ReturnType, _FuncName, _DstType, _Dst, _TType1, _TArg1)
+        #define __DEFINE_CPP_OVERLOAD_SECURE_FUNC_0_2(_ReturnType, _FuncName, _DstType, _Dst, _TType1, _TArg1, _TType2, _TArg2)
+        #define __DEFINE_CPP_OVERLOAD_SECURE_FUNC_0_3(_ReturnType, _FuncName, _DstType, _Dst, _TType1, _TArg1, _TType2, _TArg2, _TType3, _TArg3)
+        #define __DEFINE_CPP_OVERLOAD_SECURE_FUNC_0_4(_ReturnType, _FuncName, _DstType, _Dst, _TType1, _TArg1, _TType2, _TArg2, _TType3, _TArg3, _TType4, _TArg4)
+        #define __DEFINE_CPP_OVERLOAD_SECURE_FUNC_1_1(_ReturnType, _FuncName, _HType1, _HArg1, _DstType, _Dst, _TType1, _TArg1)
+        #define __DEFINE_CPP_OVERLOAD_SECURE_FUNC_1_2(_ReturnType, _FuncName, _HType1, _HArg1, _DstType, _Dst, _TType1, _TArg1, _TType2, _TArg2)
+        #define __DEFINE_CPP_OVERLOAD_SECURE_FUNC_1_3(_ReturnType, _FuncName, _HType1, _HArg1, _DstType, _Dst, _TType1, _TArg1, _TType2, _TArg2, _TType3, _TArg3)
+        #define __DEFINE_CPP_OVERLOAD_SECURE_FUNC_2_0(_ReturnType, _FuncName, _HType1, _HArg1, _HType2, _HArg2, _DstType, _Dst)
+        #define __DEFINE_CPP_OVERLOAD_SECURE_FUNC_0_1_ARGLIST(_ReturnType, _FuncName, _VFuncName, _DstType, _Dst, _TType1, _TArg1)
+        #define __DEFINE_CPP_OVERLOAD_SECURE_FUNC_0_2_ARGLIST(_ReturnType, _FuncName, _VFuncName, _DstType, _Dst, _TType1, _TArg1, _TType2, _TArg2)
+        #define __DEFINE_CPP_OVERLOAD_SECURE_FUNC_SPLITPATH(_ReturnType, _FuncName, _DstType, _Src)
+
+    #endif // !_CRT_SECURE_CPP_OVERLOAD_SECURE_NAMES
+#endif
+
 #ifdef __cplusplus
 } // extern "C"
 #endif