[UCRT] Import Microsoft.Windows.SDK.CRTSource version 10.0.22621.3

Imported from https://www.nuget.org/packages/Microsoft.Windows.SDK.CRTSource/10.0.22621.3
License: MIT

sdk/lib/ucrt/exec/loaddll.cpp

@@ -0,0 +1,65 @@
+/***
+*loaddll.c - load or free a Dynamic Link Library
+*
+*       Copyright (c) Microsoft Corporation. All rights reserved.
+*
+*Purpose:
+*       defines _loaddll() and _unloaddll() - load and unload DLL
+*
+*******************************************************************************/
+
+#include <corecrt_internal.h>
+#include <errno.h>
+#include <stdlib.h>
+
+#define _CRT_ENABLE_OBSOLETE_LOADLIBRARY_FUNCTIONS
+
+#include <process.h>
+
+/***
+*int _loaddll(filename) - Load a dll
+*
+*Purpose:
+*       Load a DLL into memory
+*
+*Entry:
+*       char *filename - file to load
+*
+*Exit:
+*       returns a unique DLL (module) handle if succeeds
+*       returns 0 if fails
+*
+*Exceptions:
+*
+*******************************************************************************/
+
+extern "C" intptr_t __cdecl _loaddll(char* szName)
+{
+    return reinterpret_cast<intptr_t>(__acrt_LoadLibraryExA(szName, nullptr, 0));
+}
+
+/***
+*int _unloaddll(handle) - Unload a dll
+*
+*Purpose:
+*       Unloads a DLL. The resources of the DLL will be freed if no other
+*       processes are using it.
+*
+*Entry:
+*       int handle - handle from _loaddll
+*
+*Exit:
+*       returns 0 if succeeds
+*       returns DOS error if fails
+*
+*Exceptions:
+*
+*******************************************************************************/
+
+extern "C" int __cdecl _unloaddll(intptr_t hMod)
+{
+        if (!FreeLibrary(reinterpret_cast<HMODULE>(hMod))) {
+            return ((int)GetLastError());
+        }
+        return (0);
+}