Extended StylesThe following styles can be specified in the dwExStyle parameter of the CreateWindowEx function.
||Specifies that a window created with this style accepts drag-drop files.
||Includes a question mark in the title bar of the window. 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 WM_HELP message. The
child window should pass the message to the parent window procedure, which should
call the WinHelp function using the HELP_WM_HELP command. The Help application displays a
pop-up window that typically contains help for the child window.
WS_EX_CONTEXTHELP cannot be used with the WS_MAXIMIZEBOX or WS_MINIMIZEBOX styles.
||Allows the user to navigate among the child windows of the window by using the TAB key.
||Creates a window with a double border. Unlike the WS_DLGFRAME style, an
application can also specify the WS_CAPTION style to create a title bar for the
||Specifies that a child window created with this style will not send the WM_PARENTNOTIFY message to its parent window when either created or destroyed.
||Specifies that a window created with this style should be placed above all
non-topmost windows and stay above them even when the window is deactivated.
||Creates a tool window; that is, a window 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 task bar or in the window that appears when the user presses ALT+TAB.
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