Add WindowsAPI/

Will add new functions as i need them.

WindowsAPI/kernel32.cs

@@ -0,0 +1,25 @@
+using System.Runtime.InteropServices;
+
+namespace Xorog.UniversalExtensions.WindowsAPI;
+
+public class kernel32
+{
+    /// <summary>
+    /// Opens an existing local process object.
+    /// </summary>
+    /// <param name="processAccess">The access to the process object. This access right is checked against the security descriptor for the process. This parameter can be one or more of the process access rights.</param>
+    /// <param name="bInheritHandle">If this value is TRUE, processes created by this process will inherit the handle. Otherwise, the processes do not inherit this handle.</param>
+    /// <param name="processId">The identifier of the local process to be opened.</param>
+    /// <returns>If the function succeeds, the return value is an open handle to the specified process. If the function fails, the return value is NULL.</returns>
+    [DllImport("kernel32.dll")]
+    public static extern IntPtr OpenProcess(uint processAccess, bool bInheritHandle, int processId);
+
+    /// <summary>
+    /// Closes an open object handle.
+    /// </summary>
+    /// <param name="hObject">A valid handle to an open object.</param>
+    /// <returns>If the function succeeds, the return value is true.</returns>
+    [DllImport("kernel32.dll", SetLastError = true)]
+    [return: MarshalAs(UnmanagedType.Bool)]
+    public static extern bool CloseHandle(IntPtr hObject);
+}