CWindow Class

Article
04/24/2015

This class provides methods for manipulating a window.

Important

This class and its members cannot be used in applications that execute in the Windows Runtime.

class CWindow

Members

Public Constructors

Name	Description
CWindow::CWindow	Constructor.

Public Methods

Name	Description
CWindow::ArrangeIconicWindows	Arranges all minimized child windows.
CWindow::Attach	Attaches a window to the CWindow object.
CWindow::BeginPaint	Prepares the window for painting.
CWindow::BringWindowToTop	Brings the window to the top of the Z order.
CWindow::CenterWindow	Centers the window against a given window.
CWindow::ChangeClipboardChain	Removes the window from the chain of Clipboard viewers.
CWindow::CheckDlgButton	Changes the check state of the specified button.
CWindow::CheckRadioButton	Checks the specified radio button.
CWindow::ChildWindowFromPoint	Retrieves the child window containing the specified point.
CWindow::ChildWindowFromPointEx	Retrieves a particular type of child window containing the specified point.
CWindow::ClientToScreen	Converts client coordinates to screen coordinates.
CWindow::Create	Creates a window.
CWindow::CreateCaret	Creates a new shape for the system caret.
CWindow::CreateGrayCaret	Creates a gray rectangle for the system caret.
CWindow::CreateSolidCaret	Creates a solid rectangle for the system caret.
CWindow::DeferWindowPos	Updates the specified multiple-window-position structure for the specified window.
CWindow::DestroyWindow	Destroys the window associated with the CWindow object.
CWindow::Detach	Detaches the window from the CWindow object.
CWindow::DlgDirList	Fills a list box with the names of all files matching a specified path or file name.
CWindow::DlgDirListComboBox	Fills a combo box with the names of all files matching a specified path or file name.
CWindow::DlgDirSelect	Retrieves the current selection from a list box.
CWindow::DlgDirSelectComboBox	Retrieves the current selection from a combo box.
CWindow::DragAcceptFiles	Registers whether the window accepts dragged files.
CWindow::DrawMenuBar	Redraws the window's menu bar.
CWindow::EnableScrollBar	Enables or disables the scroll bar arrows.
CWindow::EnableWindow	Enables or disables input.
CWindow::EndPaint	Marks the end of painting.
CWindow::FlashWindow	Flashes the window once.
CWindow::GetClientRect	Retrieves the coordinates of the client area.
CWindow::GetDC	Retrieves a device context for the client area.
CWindow::GetDCEx	Retrieves a device context for the client area and allows clipping options.
CWindow::GetDescendantWindow	Retrieves the specified descendant window.
CWindow::GetDlgControl	Retrieves an interface on the specified control.
CWindow::GetDlgCtrlID	Retrieves the window's identifier (for child windows only).
CWindow::GetDlgHost	Retrieves a pointer to an interface to the ATL Control hosting container.
CWindow::GetDlgItem	Retrieves the specified child window.
CWindow::GetDlgItemInt	Translates a control's text to an integer.
CWindow::GetDlgItemText	Retrieves a control's text.
CWindow::GetExStyle	Retrieves the extended window styles.
CWindow::GetFont	Retrieves the window's current font.
CWindow::GetHotKey	Determines the hot key associated with the window.
CWindow::GetIcon	Retrieves the window's large or small icon.
CWindow::GetLastActivePopup	Retrieves the most recently active pop-up window.
CWindow::GetMenu	Retrieves the window's menu.
CWindow::GetNextDlgGroupItem	Retrieves the previous or next control within a group of controls.
CWindow::GetNextDlgTabItem	Retrieves the previous or next control having the WS_TABSTOP style.
CWindow::GetParent	Retrieves the immediate parent window.
CWindow::GetScrollInfo	Retrieves the parameters of a scroll bar.
CWindow::GetScrollPos	Retrieves the position of the scroll box.
CWindow::GetScrollRange	Retrieves the scroll bar range.
CWindow::GetStyle	Retrieves the window styles.
CWindow::GetSystemMenu	Creates a copy of the system menu for modification.
CWindow::GetTopLevelParent	Retrieves the top-level parent or owner window.
CWindow::GetTopLevelWindow	Retrieves the top-level owner window.
CWindow::GetTopWindow	Retrieves the top-level child window.
CWindow::GetUpdateRect	Retrieves the coordinates of the smallest rectangle that completely encloses the update region.
CWindow::GetUpdateRgn	Retrieves the update region and copies it into a specified region.
CWindow::GetWindow	Retrieves the specified window.
CWindow::GetWindowContextHelpId	Retrieves the window's help context identifier.
CWindow::GetWindowDC	Retrieves a device context for the entire window.
CWindow::GetWindowLong	Retrieves a 32-bit value at a specified offset into the extra window memory.
CWindow::GetWindowLongPtr	Retrieves information about the specified window, including a value at a specified offset into the extra window memory.
CWindow::GetWindowPlacement	Retrieves the show state and positions.
CWindow::GetWindowProcessID	Retrieves the identifier of the process that created the window.
CWindow::GetWindowRect	Retrieves the window's bounding dimensions.
CWindow::GetWindowRgn	Obtains a copy of the window region of a window.
CWindow::GetWindowText	Retrieves the window's text.
CWindow::GetWindowTextLength	Retrieves the length of the window's text.
CWindow::GetWindowThreadID	Retrieves the identifier of the thread that created the specified window.
CWindow::GetWindowWord	Retrieves a 16-bit value at a specified offset into the extra window memory.
CWindow::GotoDlgCtrl	Sets the keyboard focus to a control in the dialog box.
CWindow::HideCaret	Hides the system caret.
CWindow::HiliteMenuItem	Highlights or removes the highlight from a top-level menu item.
CWindow::Invalidate	Invalidates the entire client area.
CWindow::InvalidateRect	Invalidates the client area within the specified rectangle.
CWindow::InvalidateRgn	Invalidates the client area within the specified region.
CWindow::IsChild	Determines whether the specified window is a child window.
CWindow::IsDialogMessage	Determines whether a message is intended for the specified dialog box.
CWindow::IsDlgButtonChecked	Determines the check state of the button.
CWindow::IsIconic	Determines whether the window is minimized.
CWindow::IsParentDialog	Determines if the parent window of a control is a dialog window.
CWindow::IsWindow	Determines whether the specified window handle identifies an existing window.
CWindow::IsWindowEnabled	Determines whether the window is enabled for input.
CWindow::IsWindowUnicode	Determines whether the specified window is a native Unicode window.
CWindow::IsWindowVisible	Determines the window's visibility state.
CWindow::IsZoomed	Determines whether the window is maximized.
CWindow::KillTimer	Destroys a timer event.
CWindow::LockWindowUpdate	Disables or enables drawing in the window.
CWindow::MapWindowPoints	Converts a set of points from the window's coordinate space to the coordinate space of another window.
CWindow::MessageBox	Displays a message box.
CWindow::ModifyStyle	Modifies the window styles.
CWindow::ModifyStyleEx	Modifies the extended window styles.
CWindow::MoveWindow	Changes the window's size and position.
CWindow::NextDlgCtrl	Sets the keyboard focus to the next control in the dialog box.
CWindow::OpenClipboard	Opens the Clipboard.
CWindow::PostMessage	Places a message in the message queue associated with the thread that created the window. Returns without waiting for the thread to process the message.
CWindow::PrevDlgCtrl	Sets the keyboard focus to the previous control in the dialog box.
CWindow::Print	Requests that the window be drawn in a specified device context.
CWindow::PrintClient	Requests that the window's client area be drawn in a specified device context.
CWindow::RedrawWindow	Updates a specified rectangle or region in the client area.
CWindow::ReleaseDC	Releases a device context.
CWindow::ResizeClient	Resizes the window.
CWindow::ScreenToClient	Converts screen coordinates to client coordinates.
CWindow::ScrollWindow	Scrolls the specified client area.
CWindow::ScrollWindowEx	Scrolls the specified client area with additional features.
CWindow::SendDlgItemMessage	Sends a message to a control.
CWindow::SendMessage	Sends a message to the window and does not return until the window procedure has processed the message.
CWindow::SendMessageToDescendants	Sends a message to the specified descendant windows.
CWindow::SendNotifyMessage	Sends a message to the window. If the window was created by the calling thread, SendNotifyMessage does not return until the window procedure has processed the message. Otherwise, it returns immediately.
CWindow::SetActiveWindow	Activates the window.
CWindow::SetCapture	Sends all subsequent mouse input to the window.
CWindow::SetClipboardViewer	Adds the window to the Clipboard viewer chain.
CWindow::SetDlgCtrlID	Changes the window's identifier.
CWindow::SetDlgItemInt	Changes a control's text to the string representation of an integer value.
CWindow::SetDlgItemText	Changes a control's text.
CWindow::SetFocus	Sets the input focus to the window.
CWindow::SetFont	Changes the window's current font.
CWindow::SetHotKey	Associates a hot key with the window.
CWindow::SetIcon	Changes the window's large or small icon.
CWindow::SetMenu	Changes the window's current menu.
CWindow::SetParent	Changes the parent window.
CWindow::SetRedraw	Sets or clears the redraw flag.
CWindow::SetScrollInfo	Sets the parameters of a scroll bar.
CWindow::SetScrollPos	Changes the position of the scroll box.
CWindow::SetScrollRange	Changes the scroll bar range.
CWindow::SetTimer	Creates a timer event.
CWindow::SetWindowContextHelpId	Sets the window's help context identifier.
CWindow::SetWindowLong	Sets a 32-bit value at a specified offset into the extra window memory.
CWindow::SetWindowLongPtr	Changes an attribute of the specified window, and also sets a value at the specified offset in the extra window memory.
CWindow::SetWindowPlacement	Sets the show state and positions.
CWindow::SetWindowPos	Sets the size, position, and Z order.
CWindow::SetWindowRgn	Sets the window region of a window.
CWindow::SetWindowText	Changes the window's text.
CWindow::SetWindowWord	Sets a 16-bit value at a specified offset into the extra window memory.
CWindow::ShowCaret	Displays the system caret.
CWindow::ShowOwnedPopups	Shows or hides the pop-up windows owned by the window.
CWindow::ShowScrollBar	Shows or hides a scroll bar.
CWindow::ShowWindow	Sets the window's show state.
CWindow::ShowWindowAsync	Sets the show state of a window created by a different thread.
CWindow::UpdateWindow	Updates the client area.
CWindow::ValidateRect	Validates the client area within the specified rectangle.
CWindow::ValidateRgn	Validates the client area within the specified region.
CWindow::WinHelp	Starts Windows Help.

Public Operators

Name	Description
CWindow::operator HWND	Converts the CWindow object to an HWND.
CWindow::operator =	Assigns an HWND to the CWindow object.

Public Data Members

Name	Description
CWindow::m_hWnd	The handle to the window associated with the CWindow object.
CWindow::rcDefault	Contains default window dimensions.

Remarks

CWindow provides the base functionality for manipulating a window in ATL. Many of the CWindow methods simply wrap one of the Win32 API functions. For example, compare the prototypes for CWindow::ShowWindow and ShowWindow:

CWindow method	Win32 function
BOOL ShowWindow( int nCmdShow);	BOOL ShowWindow( HWND hWnd, int nCmdShow);

CWindow::ShowWindow calls the Win32 function ShowWindow by passing CWindow::m_hWnd as the first parameter. Every CWindow method that directly wraps a Win32 function passes the m_hWnd member; therefore, much of the CWindow documentation will refer you to the Windows SDK.

Note

Not every window-related Win32 function is wrapped by CWindow, and not every CWindow method wraps a Win32 function.

CWindow::m_hWnd stores the HWND that identifies a window. An HWND is attached to your object when you:

Specify an HWND in CWindow's constructor.
Call CWindow::Attach.
Use CWindow's operator =.
Create or subclass a window using one of the following classes derived from CWindow:

CWindowImpl   Allows you to create a new window or subclass an existing window.

CContainedWindow   Implements a window contained within another object. You can create a new window or subclass an existing window.

CDialogImpl   Allows you to create a modal or modeless dialog box.

For more information about windows, see Windows and subsequent topics in the Windows SDK. For more information about using windows in ATL, see the article ATL Window Classes.

Requirements

Header: atlwin.h

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