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class="contents-expand-title">Table of contents</span></button> </div> <div class="content "><h1 id="extended-window-styles">Extended Window Styles</h1><div class="display-flex justify-content-space-between align-items-center flex-wrap-wrap page-metadata-container"> <div class="margin-right-xxs"> <ul class="metadata page-metadata" data-bi-name="page info" lang="en-us" dir="ltr"><li>Article</li><li class="visibility-hidden-visual-diff"><time class="is-invisible" data-article-date aria-label="Article review date" datetime="2022-04-07T17:47:00Z" data-article-date-source="calculated">04/07/2022</time> </li><li class="contributors-holder display-none-print"> <button type="button" class="contributors-button link-button" data-bi-name="contributors">10 contributors</button> </li></ul> </div> <div id="user-feedback" class="margin-block-xxs display-none-print" data-hide-on-archived> <button id="user-feedback-button" data-test-id="conceptual-feedback-button" class="button button-sm button-clear button-primary" type="button" data-bi-name="user-feedback-button" data-user-feedback-button > <span class="icon" aria-hidden="true"> <span class="docon docon-like"></span> </span> <span>Feedback</span> </button> </div></div><nav id="center-doc-outline" class="doc-outline is-hidden-desktop display-none-print margin-bottom-sm" data-bi-name="intopic toc" aria-label="In this article"> <h2 id="ms--in-this-article" class="title is-6 margin-block-xs">In this article</h2> </nav><p>The following are the extended window styles, these can be used along with the <a href="/en-us/windows/win32/api/winuser/nf-winuser-createwindowexa" data-linktype="absolute-path"><strong>CreateWindowExA</strong></a>/<a href="/en-us/windows/win32/api/winuser/nf-winuser-createwindowexw" data-linktype="absolute-path"><strong>CreateWindowExW</strong></a> functions.</p> <table> <thead> <tr> <th style="text-align: left;">Constant/value</th> <th style="text-align: left;">Description</th> </tr> </thead> <tbody> <tr> <td style="text-align: left;"><span id="WS_EX_ACCEPTFILES"></span><span id="ws_ex_acceptfiles"></span><dl> <dt><strong>WS_EX_ACCEPTFILES</strong></dt> <dt>0x00000010L</dt> </dl></td> <td style="text-align: left;">The window accepts drag-drop files.<br></td> </tr> <tr> <td style="text-align: left;"><span id="WS_EX_APPWINDOW"></span><span id="ws_ex_appwindow"></span><dl> <dt><strong>WS_EX_APPWINDOW</strong></dt> <dt>0x00040000L</dt> </dl></td> <td style="text-align: left;">Forces a top-level window onto the taskbar when the window is visible. <br></td> </tr> <tr> <td style="text-align: left;"><span id="WS_EX_CLIENTEDGE"></span><span id="ws_ex_clientedge"></span><dl> <dt><strong>WS_EX_CLIENTEDGE</strong></dt> <dt>0x00000200L</dt> </dl></td> <td style="text-align: left;">The window has a border with a sunken edge.<br></td> </tr> <tr> <td style="text-align: left;"><span id="WS_EX_COMPOSITED"></span><span id="ws_ex_composited"></span><dl> <dt><strong>WS_EX_COMPOSITED</strong></dt> <dt>0x02000000L</dt> </dl></td> <td style="text-align: left;">Paints all descendants of a window in bottom-to-top painting order using double-buffering. Bottom-to-top painting order allows a descendent window to have translucency (alpha) and transparency (color-key) effects, but only if the descendent window also has the WS_EX_TRANSPARENT bit set. Double-buffering allows the window and its descendents to be painted without flicker. This cannot be used if the window has a <a href="about-window-classes" data-linktype="relative-path">class style</a> of <strong>CS_OWNDC</strong>, <strong>CS_CLASSDC</strong>, or <strong>CS_PARENTDC</strong>. <br> <strong>Windows 2000:</strong> This style is not supported.<br></td> </tr> <tr> <td style="text-align: left;"><span id="WS_EX_CONTEXTHELP"></span><span id="ws_ex_contexthelp"></span><dl> <dt><strong>WS_EX_CONTEXTHELP</strong></dt> <dt>0x00000400L</dt> </dl></td> <td style="text-align: left;">The title bar of the window includes a question mark. When the user clicks the question mark, the cursor changes to a question mark with a pointer. If the user then clicks a child window, the child receives a <a href="../shell/wm-help" data-linktype="relative-path"><strong>WM_HELP</strong></a> message. The child window should pass the message to the parent window procedure, which should call the <a href="/en-us/windows/desktop/api/winuser/nf-winuser-winhelpa" data-linktype="absolute-path"><strong>WinHelp</strong></a> function using the <strong>HELP_WM_HELP</strong> command. The Help application displays a pop-up window that typically contains help for the child window.<br> <strong>WS_EX_CONTEXTHELP</strong> cannot be used with the <strong>WS_MAXIMIZEBOX</strong> or <strong>WS_MINIMIZEBOX</strong> styles.<br></td> </tr> <tr> <td style="text-align: left;"><span id="WS_EX_CONTROLPARENT"></span><span id="ws_ex_controlparent"></span><dl> <dt><strong>WS_EX_CONTROLPARENT</strong></dt> <dt>0x00010000L</dt> </dl></td> <td style="text-align: left;">The window itself contains child windows that should take part in dialog box navigation. If this style is specified, the dialog manager recurses into children of this window when performing navigation operations such as handling the TAB key, an arrow key, or a keyboard mnemonic.<br></td> </tr> <tr> <td style="text-align: left;"><span id="WS_EX_DLGMODALFRAME"></span><span id="ws_ex_dlgmodalframe"></span><dl> <dt><strong>WS_EX_DLGMODALFRAME</strong></dt> <dt>0x00000001L</dt> </dl></td> <td style="text-align: left;">The window has a double border; the window can, optionally, be created with a title bar by specifying the <strong>WS_CAPTION</strong> style in the <em>dwStyle</em> parameter.<br></td> </tr> <tr> <td style="text-align: left;"><span id="WS_EX_LAYERED"></span><span id="ws_ex_layered"></span><dl> <dt><strong>WS_EX_LAYERED</strong></dt> <dt>0x00080000</dt> </dl></td> <td style="text-align: left;">The window is a <a href="window-features" data-linktype="relative-path">layered window</a>. This style cannot be used if the window has a <a href="about-window-classes" data-linktype="relative-path">class style</a> of either <strong>CS_OWNDC</strong> or <strong>CS_CLASSDC</strong>.<br> <strong>Windows 8:</strong> The <strong>WS_EX_LAYERED</strong> style is supported for top-level windows and child windows. Previous Windows versions support <strong>WS_EX_LAYERED</strong> only for top-level windows.<br></td> </tr> <tr> <td style="text-align: left;"><span id="WS_EX_LAYOUTRTL"></span><span id="ws_ex_layoutrtl"></span><dl> <dt><strong>WS_EX_LAYOUTRTL</strong></dt> <dt>0x00400000L</dt> </dl></td> <td style="text-align: left;">If the shell language is Hebrew, Arabic, or another language that supports reading order alignment, the horizontal origin of the window is on the right edge. Increasing horizontal values advance to the left. <br></td> </tr> <tr> <td style="text-align: left;"><span id="WS_EX_LEFT"></span><span id="ws_ex_left"></span><dl> <dt><strong>WS_EX_LEFT</strong></dt> <dt>0x00000000L</dt> </dl></td> <td style="text-align: left;">The window has generic left-aligned properties. This is the default.<br></td> </tr> <tr> <td style="text-align: left;"><span id="WS_EX_LEFTSCROLLBAR"></span><span id="ws_ex_leftscrollbar"></span><dl> <dt><strong>WS_EX_LEFTSCROLLBAR</strong></dt> <dt>0x00004000L</dt> </dl></td> <td style="text-align: left;">If the shell language is Hebrew, Arabic, or another language that supports reading order alignment, the vertical scroll bar (if present) is to the left of the client area. For other languages, the style is ignored.<br></td> </tr> <tr> <td style="text-align: left;"><span id="WS_EX_LTRREADING"></span><span id="ws_ex_ltrreading"></span><dl> <dt><strong>WS_EX_LTRREADING</strong></dt> <dt>0x00000000L</dt> </dl></td> <td style="text-align: left;">The window text is displayed using left-to-right reading-order properties. This is the default.<br></td> </tr> <tr> <td style="text-align: left;"><span id="WS_EX_MDICHILD"></span><span id="ws_ex_mdichild"></span><dl> <dt><strong>WS_EX_MDICHILD</strong></dt> <dt>0x00000040L</dt> </dl></td> <td style="text-align: left;">The window is a MDI child window.<br></td> </tr> <tr> <td style="text-align: left;"><span id="WS_EX_NOACTIVATE"></span><span id="ws_ex_noactivate"></span><dl> <dt><strong>WS_EX_NOACTIVATE</strong></dt> <dt>0x08000000L</dt> </dl></td> <td style="text-align: left;">A top-level window created with this style does not become the foreground window when the user clicks it. The system does not bring this window to the foreground when the user minimizes or closes the foreground window.<br> The window should not be activated through programmatic access or via keyboard navigation by accessible technology, such as Narrator.<br> To activate the window, use the <a href="/en-us/windows/desktop/api/winuser/nf-winuser-setactivewindow" data-linktype="absolute-path"><strong>SetActiveWindow</strong></a> or <a href="/en-us/windows/win32/api/winuser/nf-winuser-setforegroundwindow" data-linktype="absolute-path"><strong>SetForegroundWindow</strong></a> function.<br> The window does not appear on the taskbar by default. To force the window to appear on the taskbar, use the <strong>WS_EX_APPWINDOW</strong> style.<br></td> </tr> <tr> <td style="text-align: left;"><span id="WS_EX_NOINHERITLAYOUT"></span><span id="ws_ex_noinheritlayout"></span><dl> <dt><strong>WS_EX_NOINHERITLAYOUT</strong></dt> <dt>0x00100000L</dt> </dl></td> <td style="text-align: left;">The window does not pass its window layout to its child windows.<br></td> </tr> <tr> <td style="text-align: left;"><span id="WS_EX_NOPARENTNOTIFY"></span><span id="ws_ex_noparentnotify"></span><dl> <dt><strong>WS_EX_NOPARENTNOTIFY</strong></dt> <dt>0x00000004L</dt> </dl></td> <td style="text-align: left;">The child window created with this style does not send the <a href="/en-us/previous-versions/windows/desktop/inputmsg/wm-parentnotify" data-linktype="absolute-path"><strong>WM_PARENTNOTIFY</strong></a> message to its parent window when it is created or destroyed.<br></td> </tr> <tr> <td style="text-align: left;"><span id="WS_EX_NOREDIRECTIONBITMAP"></span><span id="ws_ex_noredirectionbitmap"></span><dl> <dt><strong>WS_EX_NOREDIRECTIONBITMAP</strong></dt> <dt>0x00200000L</dt> </dl></td> <td style="text-align: left;">The window does not render to a redirection surface. This is for windows that do not have visible content or that use mechanisms other than surfaces to provide their visual.<br></td> </tr> <tr> <td style="text-align: left;"><span id="WS_EX_OVERLAPPEDWINDOW"></span><span id="ws_ex_overlappedwindow"></span><dl> <dt><strong>WS_EX_OVERLAPPEDWINDOW</strong></dt> <dt>(WS_EX_WINDOWEDGE | WS_EX_CLIENTEDGE)</dt> </dl></td> <td style="text-align: left;">The window is an overlapped window.<br></td> </tr> <tr> <td style="text-align: left;"><span id="WS_EX_PALETTEWINDOW"></span><span id="ws_ex_palettewindow"></span><dl> <dt><strong>WS_EX_PALETTEWINDOW</strong></dt> <dt>(WS_EX_WINDOWEDGE | WS_EX_TOOLWINDOW | WS_EX_TOPMOST)</dt> </dl></td> <td style="text-align: left;">The window is palette window, which is a modeless dialog box that presents an array of commands. <br></td> </tr> <tr> <td style="text-align: left;"><span id="WS_EX_RIGHT"></span><span id="ws_ex_right"></span><dl> <dt><strong>WS_EX_RIGHT</strong></dt> <dt>0x00001000L</dt> </dl></td> <td style="text-align: left;">The window has generic "right-aligned" properties. This depends on the window class. This style has an effect only if the shell language is Hebrew, Arabic, or another language that supports reading-order alignment; otherwise, the style is ignored.<br> Using the <strong>WS_EX_RIGHT</strong> style for static or edit controls has the same effect as using the <strong>SS_RIGHT</strong> or <strong>ES_RIGHT</strong> style, respectively. Using this style with button controls has the same effect as using <strong>BS_RIGHT</strong> and <strong>BS_RIGHTBUTTON</strong> styles. <br></td> </tr> <tr> <td style="text-align: left;"><span id="WS_EX_RIGHTSCROLLBAR"></span><span id="ws_ex_rightscrollbar"></span><dl> <dt><strong>WS_EX_RIGHTSCROLLBAR</strong></dt> <dt>0x00000000L</dt> </dl></td> <td style="text-align: left;">The vertical scroll bar (if present) is to the right of the client area. This is the default.<br></td> </tr> <tr> <td style="text-align: left;"><span id="WS_EX_RTLREADING"></span><span id="ws_ex_rtlreading"></span><dl> <dt><strong>WS_EX_RTLREADING</strong></dt> <dt>0x00002000L</dt> </dl></td> <td style="text-align: left;">If the shell language is Hebrew, Arabic, or another language that supports reading-order alignment, the window text is displayed using right-to-left reading-order properties. For other languages, the style is ignored.<br></td> </tr> <tr> <td style="text-align: left;"><span id="WS_EX_STATICEDGE"></span><span id="ws_ex_staticedge"></span><dl> <dt><strong>WS_EX_STATICEDGE</strong></dt> <dt>0x00020000L</dt> </dl></td> <td style="text-align: left;">The window has a three-dimensional border style intended to be used for items that do not accept user input.<br></td> </tr> <tr> <td style="text-align: left;"><span id="WS_EX_TOOLWINDOW"></span><span id="ws_ex_toolwindow"></span><dl> <dt><strong>WS_EX_TOOLWINDOW</strong></dt> <dt>0x00000080L</dt> </dl></td> <td style="text-align: left;">The window is intended to be used as a floating toolbar. A tool window has a title bar that is shorter than a normal title bar, and the window title is drawn using a smaller font. A tool window does not appear in the taskbar or in the dialog that appears when the user presses ALT+TAB. If a tool window has a system menu, its icon is not displayed on the title bar. However, you can display the system menu by right-clicking or by typing ALT+SPACE. <br></td> </tr> <tr> <td style="text-align: left;"><span id="WS_EX_TOPMOST"></span><span id="ws_ex_topmost"></span><dl> <dt><strong>WS_EX_TOPMOST</strong></dt> <dt>0x00000008L</dt> </dl></td> <td style="text-align: left;">The window should be placed above all non-topmost windows and should stay above them, even when the window is deactivated. To add or remove this style, use the <a href="/en-us/windows/win32/api/winuser/nf-winuser-setwindowpos" data-linktype="absolute-path"><strong>SetWindowPos</strong></a> function.<br></td> </tr> <tr> <td style="text-align: left;"><span id="WS_EX_TRANSPARENT"></span><span id="ws_ex_transparent"></span><dl> <dt><strong>WS_EX_TRANSPARENT</strong></dt> <dt>0x00000020L</dt> </dl></td> <td style="text-align: left;">The window should not be painted until siblings beneath the window (that were created by the same thread) have been painted. The window appears transparent because the bits of underlying sibling windows have already been painted.<br> To achieve transparency without these restrictions, use the <a href="/en-us/windows/desktop/api/winuser/nf-winuser-setwindowrgn" data-linktype="absolute-path"><strong>SetWindowRgn</strong></a> function.<br></td> </tr> <tr> <td style="text-align: left;"><span id="WS_EX_WINDOWEDGE"></span><span id="ws_ex_windowedge"></span><dl> <dt><strong>WS_EX_WINDOWEDGE</strong></dt> <dt>0x00000100L</dt> </dl></td> <td style="text-align: left;">The window has a border with a raised edge.<br></td> </tr> </tbody> </table> <h2 id="requirements">Requirements</h2> <table> <thead> <tr> <th>Requirement</th> <th>Value</th> </tr> </thead> <tbody> <tr> <td>Minimum supported client<br></td> <td>Windows 2000 Professional [desktop apps only]<br></td> </tr> <tr> <td>Minimum supported server<br></td> <td>Windows 2000 Server [desktop apps only]<br></td> </tr> <tr> <td>Header<br></td> <td><dl> <dt>Winuser.h 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