# HG changeset patch
# User Frank Benoit <benoit@tionex.de>
# Date 1213972056 -7200
# Node ID 43b41c7fe84a4099f99fa56569615f17986e9593
# Parent  efe25e7c8a96bad02a95f1bab3ce662215bb7ca9
work on allow null strings and arrays

diff -r efe25e7c8a96 -r 43b41c7fe84a dwt/graphics/GC.d
--- a/dwt/graphics/GC.d	Fri Jun 20 01:29:54 2008 +0200
+++ b/dwt/graphics/GC.d	Fri Jun 20 16:27:36 2008 +0200
@@ -1798,16 +1798,14 @@
  *
  * @param pointArray an array of alternating x and y values which are the vertices of the polygon
  *
- * @exception IllegalArgumentException <ul>
- *    <li>ERROR_NULL_ARGUMENT if pointArray is null</li>
- * </ul>
  * @exception DWTException <ul>
  *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
  * </ul>
  */
 public void drawPolygon( int[] pointArray) {
     if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED);
-    if (pointArray is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
+    // DWT extension: allow null array
+    //if (pointArray is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
     checkGC(DRAW);
     auto gdipGraphics = data.gdipGraphics;
     if (gdipGraphics !is null) {
@@ -1843,16 +1841,14 @@
  *
  * @param pointArray an array of alternating x and y values which are the corners of the polyline
  *
- * @exception IllegalArgumentException <ul>
- *    <li>ERROR_NULL_ARGUMENT - if the point array is null</li>
- * </ul>
  * @exception DWTException <ul>
  *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
  * </ul>
  */
 public void drawPolyline(int[] pointArray) {
     if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED);
-    if (pointArray is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
+    // DWT externsion: allow null array
+    //if (pointArray is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
     checkGC(DRAW);
     auto gdipGraphics = data.gdipGraphics;
     if (gdipGraphics !is null) {
@@ -2091,9 +2087,6 @@
  * @param x the x coordinate of the top left corner of the rectangular area where the string is to be drawn
  * @param y the y coordinate of the top left corner of the rectangular area where the string is to be drawn
  *
- * @exception IllegalArgumentException <ul>
- *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
- * </ul>
  * @exception DWTException <ul>
  *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
  * </ul>
@@ -2115,16 +2108,14 @@
  * @param y the y coordinate of the top left corner of the rectangular area where the string is to be drawn
  * @param isTransparent if <code>true</code> the background will be transparent, otherwise it will be opaque
  *
- * @exception IllegalArgumentException <ul>
- *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
- * </ul>
  * @exception DWTException <ul>
  *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
  * </ul>
  */
 public void drawString (String string, int x, int y, bool isTransparent) {
     if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED);
-    if (string is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
+    // DWT extension: allow null string
+    //if (string is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
 //  TCHAR buffer = new TCHAR (getCodePage(), string, false);
     wchar[] wstr = StrToWCHARs( string );
     int length_ = wstr.length;
@@ -2247,9 +2238,6 @@
  * @param x the x coordinate of the top left corner of the rectangular area where the text is to be drawn
  * @param y the y coordinate of the top left corner of the rectangular area where the text is to be drawn
  *
- * @exception IllegalArgumentException <ul>
- *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
- * </ul>
  * @exception DWTException <ul>
  *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
  * </ul>
@@ -2271,9 +2259,6 @@
  * @param y the y coordinate of the top left corner of the rectangular area where the text is to be drawn
  * @param isTransparent if <code>true</code> the background will be transparent, otherwise it will be opaque
  *
- * @exception IllegalArgumentException <ul>
- *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
- * </ul>
  * @exception DWTException <ul>
  *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
  * </ul>
@@ -2311,16 +2296,14 @@
  * @param y the y coordinate of the top left corner of the rectangular area where the text is to be drawn
  * @param flags the flags specifying how to process the text
  *
- * @exception IllegalArgumentException <ul>
- *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
- * </ul>
  * @exception DWTException <ul>
  *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
  * </ul>
  */
 public void drawText (String string, int x, int y, int flags) {
     if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED);
-    if (string is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
+    // DWT extension: allow null string
+    //if (string is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
     if (string.length is 0) return;
     auto gdipGraphics = data.gdipGraphics;
     if (gdipGraphics !is null) {
@@ -2771,9 +2754,6 @@
  *
  * @param pointArray an array of alternating x and y values which are the vertices of the polygon
  *
- * @exception IllegalArgumentException <ul>
- *    <li>ERROR_NULL_ARGUMENT if pointArray is null</li>
- * </ul>
  * @exception DWTException <ul>
  *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
  * </ul>
@@ -2782,7 +2762,8 @@
  */
 public void fillPolygon(int[] pointArray) {
     if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED);
-    if (pointArray is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
+    // DWT externsion: allow null array
+    //if (pointArray is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
     checkGC(FILL);
     if (data.gdipGraphics !is null) {
         int mode = OS.GetPolyFillMode(handle) is OS.WINDING ? Gdip.FillModeWinding : Gdip.FillModeAlternate;
@@ -4736,16 +4717,14 @@
  * @param string the string to measure
  * @return a point containing the extent of the string
  *
- * @exception IllegalArgumentException <ul>
- *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
- * </ul>
  * @exception DWTException <ul>
  *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
  * </ul>
  */
 public Point stringExtent(String string) {
     if (handle is null) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED);
-    if (string is null) DWT.error (DWT.ERROR_NULL_ARGUMENT);
+    // DWT externsion: allow null string
+    //if (string is null) DWT.error (DWT.ERROR_NULL_ARGUMENT);
     checkGC(FONT);
     int length_ = string.length;
     if (data.gdipGraphics !is null) {
diff -r efe25e7c8a96 -r 43b41c7fe84a dwt/program/Program.d
--- a/dwt/program/Program.d	Fri Jun 20 01:29:54 2008 +0200
+++ b/dwt/program/Program.d	Fri Jun 20 16:27:36 2008 +0200
@@ -74,12 +74,10 @@
  * @param extension the program extension
  * @return the program or <code>null</code>
  *
- * @exception IllegalArgumentException <ul>
- *      <li>ERROR_NULL_ARGUMENT when extension is null</li>
- *  </ul>
  */
 public static Program findProgram (String extension) {
-    if (extension is null) DWT.error (DWT.ERROR_NULL_ARGUMENT);
+    // DWT extension: allow null string
+    //if (extension is null) DWT.error (DWT.ERROR_NULL_ARGUMENT);
     if (extension.length is 0) return null;
     if (extension.charAt (0) !is '.') extension = "." ~ extension; //$NON-NLS-1$
     /* Use the character encoding for the default locale */
diff -r efe25e7c8a96 -r 43b41c7fe84a dwt/widgets/Button.d
--- a/dwt/widgets/Button.d	Fri Jun 20 01:29:54 2008 +0200
+++ b/dwt/widgets/Button.d	Fri Jun 20 16:27:36 2008 +0200
@@ -1024,7 +1024,8 @@
  */
 /*public*/ void setMessage (String message) {
     checkWidget ();
-    if (message is null) error (DWT.ERROR_NULL_ARGUMENT);
+    // DWT externsion: allow null string
+    //if (message is null) error (DWT.ERROR_NULL_ARGUMENT);
     this.message = message;
     if (OS.COMCTL32_VERSION >= OS.VERSION (6, 1)) {
         if ((style & DWT.COMMAND) !is 0) {
@@ -1109,9 +1110,6 @@
  * </p>
  * @param string the new text
  *
- * @exception IllegalArgumentException <ul>
- *    <li>ERROR_NULL_ARGUMENT - if the text is null</li>
- * </ul>
  * @exception DWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
@@ -1119,7 +1117,8 @@
  */
 public void setText (String string) {
     checkWidget ();
-    if (string is null) error (DWT.ERROR_NULL_ARGUMENT);
+    // DWT externsion: allow null string
+    //if (string is null) error (DWT.ERROR_NULL_ARGUMENT);
     if ((style & DWT.ARROW) !is 0) return;
     text = string;
     /* This code is intentionally commented */
diff -r efe25e7c8a96 -r 43b41c7fe84a dwt/widgets/Combo.d
--- a/dwt/widgets/Combo.d	Fri Jun 20 01:29:54 2008 +0200
+++ b/dwt/widgets/Combo.d	Fri Jun 20 16:27:36 2008 +0200
@@ -174,9 +174,6 @@
  *
  * @param string the new item
  *
- * @exception IllegalArgumentException <ul>
- *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
- * </ul>
  * @exception DWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
@@ -186,7 +183,8 @@
  */
 public void add (String string) {
     checkWidget ();
-    if (string is null) error (DWT.ERROR_NULL_ARGUMENT);
+    // DWT extension: allow null string
+    //if (string is null) error (DWT.ERROR_NULL_ARGUMENT);
     auto buffer = StrToTCHARs( getCodePage(), string, true );
     int result = OS.SendMessage (handle, OS.CB_ADDSTRING, 0, buffer.ptr );
     if (result is OS.CB_ERR) error (DWT.ERROR_ITEM_NOT_ADDED);
@@ -207,7 +205,6 @@
  * @param index the index for the item
  *
  * @exception IllegalArgumentException <ul>
- *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
  *    <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list (inclusive)</li>
  * </ul>
  * @exception DWTException <ul>
@@ -219,7 +216,8 @@
  */
 public void add (String string, int index) {
     checkWidget ();
-    if (string is null) error (DWT.ERROR_NULL_ARGUMENT);
+    // DWT extension: allow null string
+    //if (string is null) error (DWT.ERROR_NULL_ARGUMENT);
     int count = OS.SendMessage (handle, OS.CB_GETCOUNT, 0, 0);
     if (!(0 <= index && index <= count)) {
         error (DWT.ERROR_INVALID_RANGE);
@@ -979,9 +977,6 @@
  * @param string the search item
  * @return the index of the item
  *
- * @exception IllegalArgumentException <ul>
- *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
- * </ul>
  * @exception DWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
@@ -1002,9 +997,6 @@
  * @param start the zero-relative index at which to begin the search
  * @return the index of the item
  *
- * @exception IllegalArgumentException <ul>
- *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
- * </ul>
  * @exception DWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
@@ -1012,7 +1004,8 @@
  */
 public int indexOf (String string, int start) {
     checkWidget ();
-    if (string is null) error (DWT.ERROR_NULL_ARGUMENT);
+    // DWT externsion: allow null string
+    //if (string is null) error (DWT.ERROR_NULL_ARGUMENT);
 
     /*
     * Bug in Windows.  For some reason, CB_FINDSTRINGEXACT
@@ -1023,7 +1016,7 @@
     if (string.length  is 0) {
         int count = getItemCount ();
         for (int i=start; i<count; i++) {
-            if (string==/*eq*/getItem (i)) return i;
+            if (string.equals (getItem (i))) return i;
         }
         return -1;
     }
@@ -1225,7 +1218,6 @@
  * @param string the item to remove
  *
  * @exception IllegalArgumentException <ul>
- *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
  *    <li>ERROR_INVALID_ARGUMENT - if the string is not found in the list</li>
  * </ul>
  * @exception DWTException <ul>
@@ -1235,7 +1227,8 @@
  */
 public void remove (String string) {
     checkWidget ();
-    if (string is null) error (DWT.ERROR_NULL_ARGUMENT);
+    // DWT extension: allow null string
+    //if (string is null) error (DWT.ERROR_NULL_ARGUMENT);
     int index = indexOf (string, 0);
     if (index is -1) error (DWT.ERROR_INVALID_ARGUMENT);
     remove (index);
@@ -1530,7 +1523,6 @@
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)</li>
- *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
  * </ul>
  * @exception DWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
@@ -1539,7 +1531,8 @@
  */
 public void setItem (int index, String string) {
     checkWidget ();
-    if (string is null) error (DWT.ERROR_NULL_ARGUMENT);
+    // DWT extension: allow null string
+    //if (string is null) error (DWT.ERROR_NULL_ARGUMENT);
     int selection = getSelectionIndex ();
     remove (index, false);
     if (isDisposed ()) return;
@@ -1553,7 +1546,6 @@
  * @param items the array of items
  *
  * @exception IllegalArgumentException <ul>
- *    <li>ERROR_NULL_ARGUMENT - if the items array is null</li>
  *    <li>ERROR_INVALID_ARGUMENT - if an item in the items array is null</li>
  * </ul>
  * @exception DWTException <ul>
@@ -1563,7 +1555,8 @@
  */
 public void setItems (String [] items) {
     checkWidget ();
-    if (items is null) error (DWT.ERROR_NULL_ARGUMENT);
+    // DWT extension: allow null string
+    //if (items is null) error (DWT.ERROR_NULL_ARGUMENT);
     for (int i=0; i<items.length; i++) {
         if (items [i] is null) error (DWT.ERROR_INVALID_ARGUMENT);
     }
@@ -1804,9 +1797,6 @@
  *
  * @param string the new text
  *
- * @exception IllegalArgumentException <ul>
- *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
- * </ul>
  * @exception DWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
@@ -1814,7 +1804,8 @@
  */
 public void setText (String string) {
     checkWidget ();
-    if (string is null) error (DWT.ERROR_NULL_ARGUMENT);
+    // DWT externsion: allow null string
+    //if (string is null) error (DWT.ERROR_NULL_ARGUMENT);
     if ((style & DWT.READ_ONLY) !is 0) {
         int index = indexOf (string);
         if (index !is -1) select (index);
diff -r efe25e7c8a96 -r 43b41c7fe84a dwt/widgets/CoolBar.d
--- a/dwt/widgets/CoolBar.d	Fri Jun 20 01:29:54 2008 +0200
+++ b/dwt/widgets/CoolBar.d	Fri Jun 20 16:27:36 2008 +0200
@@ -815,7 +815,6 @@
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  * @exception IllegalArgumentException <ul>
- *    <li>ERROR_NULL_ARGUMENT - if item order or sizes is null</li>
  *    <li>ERROR_INVALID_ARGUMENT - if item order or sizes is not the same length as the number of items</li>
  * </ul>
  */
@@ -841,12 +840,12 @@
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  * @exception IllegalArgumentException <ul>
- *    <li>ERROR_NULL_ARGUMENT - if the item order is null</li>
  *    <li>ERROR_INVALID_ARGUMENT - if the item order is not the same length as the number of items</li>
  * </ul>
  */
 void setItemOrder (int [] itemOrder) {
-    if (itemOrder is null) error (DWT.ERROR_NULL_ARGUMENT);
+    // DWT extension: allow null array
+    //if (itemOrder is null) error (DWT.ERROR_NULL_ARGUMENT);
     int itemCount = OS.SendMessage (handle, OS.RB_GETBANDCOUNT, 0, 0);
     if (itemOrder.length !is itemCount) error (DWT.ERROR_INVALID_ARGUMENT);
 
@@ -905,7 +904,8 @@
  * </ul>
  */
 void setItemSizes (Point [] sizes) {
-    if (sizes is null) error (DWT.ERROR_NULL_ARGUMENT);
+    // DWT extension: allow null array
+    //if (sizes is null) error (DWT.ERROR_NULL_ARGUMENT);
     int count = OS.SendMessage (handle, OS.RB_GETBANDCOUNT, 0, 0);
     if (sizes.length !is count) error (DWT.ERROR_INVALID_ARGUMENT);
     REBARBANDINFO rbBand;
diff -r efe25e7c8a96 -r 43b41c7fe84a dwt/widgets/Decorations.d
--- a/dwt/widgets/Decorations.d	Fri Jun 20 01:29:54 2008 +0200
+++ b/dwt/widgets/Decorations.d	Fri Jun 20 16:27:36 2008 +0200
@@ -1060,7 +1060,6 @@
  * @param images the new image array
  *
  * @exception IllegalArgumentException <ul>
- *    <li>ERROR_NULL_ARGUMENT - if the array of images is null</li>
  *    <li>ERROR_INVALID_ARGUMENT - if one of the images is null or has been disposed</li>
  * </ul>
  * @exception DWTException <ul>
@@ -1072,7 +1071,8 @@
  */
 public void setImages (Image [] images) {
     checkWidget ();
-    if (images is null) error (DWT.ERROR_INVALID_ARGUMENT);
+    // DWT extension: allow null array
+    //if (images is null) error (DWT.ERROR_INVALID_ARGUMENT);
     for (int i = 0; i < images.length; i++) {
         if (images [i] is null || images [i].isDisposed ()) error (DWT.ERROR_INVALID_ARGUMENT);
     }
@@ -1328,9 +1328,6 @@
  *
  * @param string the new text
  *
- * @exception IllegalArgumentException <ul>
- *    <li>ERROR_NULL_ARGUMENT - if the text is null</li>
- * </ul>
  * @exception DWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
@@ -1338,7 +1335,8 @@
  */
 public void setText (String string) {
     checkWidget ();
-    if (string is null) error (DWT.ERROR_NULL_ARGUMENT);
+    // DWT extension: allow null string
+    //if (string is null) error (DWT.ERROR_NULL_ARGUMENT);
     /* Use the character encoding for the default locale */
     TCHAR[] buffer = StrToTCHARs (string, true);
     /* Ensure that the title appears in the task bar.*/
diff -r efe25e7c8a96 -r 43b41c7fe84a dwt/widgets/Dialog.d
--- a/dwt/widgets/Dialog.d	Fri Jun 20 01:29:54 2008 +0200
+++ b/dwt/widgets/Dialog.d	Fri Jun 20 16:27:36 2008 +0200
@@ -255,16 +255,14 @@
  *
  * @param string the new text
  *
- * @exception IllegalArgumentException <ul>
- *    <li>ERROR_NULL_ARGUMENT - if the text is null</li>
- * </ul>
  * @exception DWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  */
 public void setText (String string) {
-    if (string is null) error (DWT.ERROR_NULL_ARGUMENT);
+    // DWT extension: allow null string
+    //if (string is null) error (DWT.ERROR_NULL_ARGUMENT);
     title = string;
 }
 
diff -r efe25e7c8a96 -r 43b41c7fe84a dwt/widgets/DirectoryDialog.d
--- a/dwt/widgets/DirectoryDialog.d	Fri Jun 20 01:29:54 2008 +0200
+++ b/dwt/widgets/DirectoryDialog.d	Fri Jun 20 16:27:36 2008 +0200
@@ -308,12 +308,10 @@
  *
  * @param string the message
  *
- * @exception IllegalArgumentException <ul>
- *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
- * </ul>
  */
 public void setMessage (String string) {
-    if (string is null) error (DWT.ERROR_NULL_ARGUMENT);
+    // DWT extension: allow null string
+    //if (string is null) error (DWT.ERROR_NULL_ARGUMENT);
     message = string;
 }
 
diff -r efe25e7c8a96 -r 43b41c7fe84a dwt/widgets/Display.d
--- a/dwt/widgets/Display.d	Fri Jun 20 01:29:54 2008 +0200
+++ b/dwt/widgets/Display.d	Fri Jun 20 16:27:36 2008 +0200
@@ -1626,9 +1626,6 @@
  * @param key the name of the property
  * @return the value of the property or null if it has not been set
  *
- * @exception IllegalArgumentException <ul>
- *    <li>ERROR_NULL_ARGUMENT - if the key is null</li>
- * </ul>
  * @exception DWTException <ul>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
@@ -1639,7 +1636,8 @@
  */
 public Object getData (String key) {
     checkDevice ();
-    if (key is null) error (DWT.ERROR_NULL_ARGUMENT);
+    // DWT extension: allow null string
+    //if (key is null) error (DWT.ERROR_NULL_ARGUMENT);
     if (key ==/*eq*/RUN_MESSAGES_IN_IDLE_KEY) {
         return new ValueWrapperBool(runMessagesInIdle);
     }
@@ -4081,9 +4079,6 @@
  * @param key the name of the property
  * @param value the new value for the property
  *
- * @exception IllegalArgumentException <ul>
- *    <li>ERROR_NULL_ARGUMENT - if the key is null</li>
- * </ul>
  * @exception DWTException <ul>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
@@ -4094,7 +4089,8 @@
  */
 public void setData (String key, Object value) {
     checkDevice ();
-    if (key is null) error (DWT.ERROR_NULL_ARGUMENT);
+    // DWT extension: allow null string
+    //if (key is null) error (DWT.ERROR_NULL_ARGUMENT);
 
     if (key ==/*eq*/RUN_MESSAGES_IN_IDLE_KEY) {
         auto data = cast(ValueWrapperBool) value;