Add definition of hostfxr_get_dotnet_environment_info_fn to hostfxr.h (#75860)

* Add definition of hostfxr_get_dotnet_environment_info_fn to hostfxr.h.

* Move doc for hostfxr_get_dotnet_environment_info into hostfxr.h.

src/native/corehost/fxr/hostfxr.cpp

@@ -344,41 +344,6 @@ SHARED_API int32_t HOSTFXR_CALLTYPE hostfxr_get_available_sdks(
     return StatusCode::Success;
 }
 
-//
-// Returns available SDKs and frameworks.
-//
-// Resolves the existing SDKs and frameworks from a dotnet root directory (if
-// any), or the global default location. If multi-level lookup is enabled and
-// the dotnet root location is different than the global location, the SDKs and
-// frameworks will be enumerated from both locations.
-//
-// The SDKs are sorted in ascending order by version, multi-level lookup
-// locations are put before private ones.
-//
-// The frameworks are sorted in ascending order by name followed by version,
-// multi-level lookup locations are put before private ones.
-//
-// Parameters:
-//    dotnet_root
-//      The path to a directory containing a dotnet executable.
-//
-//    reserved
-//      Reserved for future parameters.
-//
-//    result
-//      Callback invoke to return the list of SDKs and frameworks.
-//      Structs and their elements are valid for the duration of the call.
-//
-//    result_context
-//      Additional context passed to the result callback.
-//
-// Return value:
-//   0 on success, otherwise failure.
-//
-// String encoding:
-//   Windows     - UTF-16 (pal::char_t is 2 byte wchar_t)
-//   Unix        - UTF-8  (pal::char_t is 1 byte char)
-//
 SHARED_API int32_t HOSTFXR_CALLTYPE hostfxr_get_dotnet_environment_info(
     const pal::char_t* dotnet_root,
     void* reserved,

src/native/corehost/hostfxr.h

@@ -320,4 +320,45 @@ struct hostfxr_dotnet_environment_info
     const struct hostfxr_dotnet_environment_framework_info* frameworks;
 };
 
+//
+// Returns available SDKs and frameworks.
+//
+// Resolves the existing SDKs and frameworks from a dotnet root directory (if
+// any), or the global default location. If multi-level lookup is enabled and
+// the dotnet root location is different than the global location, the SDKs and
+// frameworks will be enumerated from both locations.
+//
+// The SDKs are sorted in ascending order by version, multi-level lookup
+// locations are put before private ones.
+//
+// The frameworks are sorted in ascending order by name followed by version,
+// multi-level lookup locations are put before private ones.
+//
+// Parameters:
+//    dotnet_root
+//      The path to a directory containing a dotnet executable.
+//
+//    reserved
+//      Reserved for future parameters.
+//
+//    result
+//      Callback invoke to return the list of SDKs and frameworks.
+//      Structs and their elements are valid for the duration of the call.
+//
+//    result_context
+//      Additional context passed to the result callback.
+//
+// Return value:
+//   0 on success, otherwise failure.
+//
+// String encoding:
+//   Windows     - UTF-16 (pal::char_t is 2 byte wchar_t)
+//   Unix        - UTF-8  (pal::char_t is 1 byte char)
+//
+typedef int32_t(HOSTFXR_CALLTYPE* hostfxr_get_dotnet_environment_info_fn)(
+    const char_t* dotnet_root,
+    void* reserved,
+    hostfxr_get_dotnet_environment_info_result_fn result,
+    void* result_context);
+
 #endif //__HOSTFXR_H__