test

test-size.ps1

@@ -0,0 +1,40 @@
+Add-Type -TypeDefinition @"
+using System;
+using System.Runtime.InteropServices;
+
+public class MI {
+    [StructLayout(LayoutKind.Sequential)]
+    public struct MOUSEINPUT {
+        public int dx;
+        public int dy;
+        public uint mouseData;
+        public uint dwFlags;
+        public uint time;
+        public IntPtr dwExtraInfo;
+    }
+    [StructLayout(LayoutKind.Sequential)]
+    public struct INPUT {
+        public uint type;
+        public MOUSEINPUT mi;
+    }
+}
+"@
+
+$type = [MI+INPUT]
+Write-Host "Type: $($type.FullName)"
+Write-Host "IsValueType: $($type.IsValueType)"
+
+try { 
+    $s = [Runtime.InteropServices.Marshal]::SizeOf($type)
+    Write-Host "SizeOf(type): $s"
+} catch { 
+    Write-Host "SizeOf(type) failed: $($_.Exception.Message)"
+}
+
+$inst = [Activator]::CreateInstance($type)
+try { 
+    $s2 = [Runtime.InteropServices.Marshal]::SizeOf($inst)
+    Write-Host "SizeOf(inst): $s2"
+} catch { 
+    Write-Host "SizeOf(inst) failed: $($_.Exception.Message)"
+}