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diff --git a/tests/org.eclipse.swt.tests.win32/ManualTests/org/eclipse/swt/tests/win32/snippets/Bug543747_JvmCrash_Msctf.java b/tests/org.eclipse.swt.tests.win32/ManualTests/org/eclipse/swt/tests/win32/snippets/Bug543747_JvmCrash_Msctf.java
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+++ b/tests/org.eclipse.swt.tests.win32/ManualTests/org/eclipse/swt/tests/win32/snippets/Bug543747_JvmCrash_Msctf.java
@@ -0,0 +1,202 @@
+/*******************************************************************************
+ * Copyright (c) 2019 Syntevo and others. All rights reserved.
+ * The contents of this file are made available under the terms
+ * of the GNU Lesser General Public License (LGPL) Version 2.1 that
+ * accompanies this distribution (lgpl-v21.txt).  The LGPL is also
+ * available at http://www.gnu.org/licenses/lgpl.html.  If the version
+ * of the LGPL at http://www.gnu.org is different to the version of
+ * the LGPL accompanying this distribution and there is any conflict
+ * between the two license versions, the terms of the LGPL accompanying
+ * this distribution shall govern.
+ *
+ * Contributors:
+ *     Syntevo - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.swt.tests.win32.snippets;
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.layout.*;
+import org.eclipse.swt.widgets.*;
+
+public class Bug543747_JvmCrash_Msctf {
+	/**
+	 * This test demonstrates a crash where destroying a Shell
+	 * accesses context already freed by 'ImmDestroyContext'.
+	 */
+	public static void reproduceCrash1(Shell parentShell) {
+		Shell tempShell = new Shell(parentShell);
+
+		// Create something to catch initial focus, so that
+		// text.setFocus() does something. This is only to
+		// show that .setFocus() is important.
+		new Button(tempShell, SWT.PUSH);
+
+		// This Text will cause crash.
+		Text text = new Text(tempShell, 0);
+
+		// Shell must be visible to prevent early return in .setFocus()
+		tempShell.setSize(10, 10);
+		tempShell.open();
+
+		// ImmAssociateContext() itself is lazy.
+		// .setFocus() causes it to start up.
+		text.setFocus();
+
+		// Destroying the shell triggers the bug.
+		tempShell.dispose();
+
+		// JVM still alive?
+		MessageBox msgbox = new MessageBox(parentShell);
+		msgbox.setMessage("Crash didn't reproduce");
+		msgbox.open();
+	}
+
+	/**
+	 * This test demonstrates a crash where destroying a Shell
+	 * accesses context already freed by 'ImmDestroyContext'
+	 * if IME-capable Control has an intermediate parent.
+	 */
+	public static void reproduceCrash23(Shell parentShell, boolean focusEditOnClose) {
+		Shell tempShell = new Shell(parentShell);
+
+		// Create something to catch initial focus, so that
+		// text.setFocus() does something. This is only to
+		// show that .setFocus() is important.
+		Button button = new Button(tempShell, SWT.PUSH);
+
+		// This Text will cause crash.
+		// Text needs to have an intermediate parent for this bug.
+		Composite composite = new Composite(tempShell, 0);
+		Text text = new Text(composite, 0);
+
+		// Shell must be visible to prevent early return in .setFocus()
+		tempShell.setSize(10, 10);
+		tempShell.open();
+
+		// ImmAssociateContext() itself is lazy.
+		// .setFocus() causes it to start up.
+		text.setFocus();
+
+		// There are two slightly different crashes depending on focus
+		if (!focusEditOnClose)
+			button.setFocus();
+
+		// Destroying the shell triggers the bug.
+		tempShell.dispose();
+
+		// Give additional instructions
+		MessageBox msgbox = new MessageBox(parentShell);
+		msgbox.setMessage(
+				"Now please do one of:\n" +
+				"a) Open Task Manager, go to Users, right-click your user, select Disconnect, log in again\n" +
+				"b) Connect Remote Desktop to this machine\n" +
+				"\n" +
+				"The snippet is expected to crash just after that."
+		);
+		msgbox.open();
+	}
+
+	/**
+	 * This test demonstrates a crash where destroying a Composite
+	 * with Text inside it crashes, even if 'ImmDestroyContext' wasn't
+	 * called yet.
+	 */
+	public static void reproduceCrash4(Shell parentShell) {
+		Shell tempShell = new Shell(parentShell);
+
+		// Create something to catch initial focus, so that
+		// text.setFocus() does something. This is only to
+		// show that .setFocus() is important.
+		// new Button(tempShell, SWT.PUSH);
+
+		// This Text will cause crash.
+		// Text needs to have an intermediate parent for this bug.
+		Composite composite = new Composite(tempShell, 0);
+		Text text = new Text(composite, 0);
+
+		// Shell must be visible to prevent early return in .setFocus()
+		tempShell.setSize(10, 10);
+		tempShell.open();
+
+		// ImmAssociateContext() itself is lazy.
+		// .setFocus() causes it to start up.
+		text.setFocus();
+
+		// Destroying the composite triggers the bug.
+		composite.dispose();
+
+		// Cleanup
+		tempShell.dispose();
+
+		// JVM still alive?
+		MessageBox msgbox = new MessageBox(parentShell);
+		msgbox.setMessage("Crash didn't reproduce");
+		msgbox.open();
+	}
+
+	public static void main (String [] args) {
+		Display display = new Display ();
+
+		Shell shell = new Shell (display);
+		RowLayout layout = new RowLayout(SWT.VERTICAL);
+		layout.marginHeight = 10;
+		layout.marginWidth = 10;
+		layout.spacing = 10;
+		shell.setLayout(layout);
+
+		final Text labelInfo = new Text(shell, SWT.READ_ONLY | SWT.MULTI);
+		labelInfo.setText(
+				"Both of these crashes are only seen on Win10 1809+\n" +
+				"\n" +
+				"To reproduce reliably, use Application Verifier:\n" +
+				"1) Install Application Verifier:\n" +
+				"a) Download Windows SDK:\n" +
+				"   https://go.microsoft.com/fwlink/p/?LinkID=2033908\n" +
+				"b) Install it, selecting Application Verifier. Other components are not required.\n" +
+				"\n" +
+				"2) Configure Application Verifier\n" +
+				"a) Run 'Application Verifier (X64)' from Start menu.\n" +
+				"b) Use File | Add application... to add java.exe\n" +
+				"c) IMPORTANT: On the right pane, make sure that only 'Basics/Heaps' is selected.\n" +
+				"   JVM always crashes with 'Basics/Exceptions' and 'Basics/Memory'\n" +
+				"d) Click 'Save'. You can close Application Verifier now\n" +
+				"   It will be active until you explicitly disable it.\n" +
+				"e) Restart application once.\n" +
+				"f) Note: applications run slower and consume more RAM under Application Verifier.\n" +
+				"\n" +
+				"3) Reproduce the problem\n" +
+				"\n" +
+				"4) Disable Application Verifier if you want\n" +
+				"a) Keep it enabled it if you're ready to tolerate the slowness, but find more bugs\n" +
+				"b) Go to Application Verifier again\n" +
+				"c) Delete java.exe from the list.\n" +
+				"d) Click Save.\n" +
+				"e) There's no need to uninstall Application Verifier, but you can do that if you like."
+		);
+
+		final Button buttonCrash1 = new Button(shell, SWT.PUSH);
+		buttonCrash1.setText("Reproduce crash #1 - Bug 526758");
+		buttonCrash1.addListener(SWT.Selection, event -> {reproduceCrash1(shell);});
+
+		final Button buttonCrash2 = new Button(shell, SWT.PUSH);
+		buttonCrash2.setText("Reproduce crash #2 - Bug 543747 (A)");
+		buttonCrash2.addListener(SWT.Selection, event -> {reproduceCrash23(shell, true);});
+
+		final Button buttonCrash3 = new Button(shell, SWT.PUSH);
+		buttonCrash3.setText("Reproduce crash #3 - Bug 543747 (B)");
+		buttonCrash3.addListener(SWT.Selection, event -> {reproduceCrash23(shell, false);});
+
+		final Button buttonCrash4 = new Button(shell, SWT.PUSH);
+		buttonCrash4.setText("Reproduce crash #4 - Bug 543747 (C)");
+		buttonCrash4.addListener(SWT.Selection, event -> {reproduceCrash4(shell);});
+
+		shell.pack();
+		shell.open();
+
+		while (!shell.isDisposed()) {
+			if (!display.readAndDispatch ()) display.sleep ();
+		}
+
+		display.dispose ();
+	}
+}