CWnd Class Members
Initialization | Dialog-Box Item Functions | Initialization Message Handlers |
Window State Functions | Data-Binding Functions | System Message Handlers |
Window Size and Position | Menu Functions | General Message Handlers |
Window Access Functions | Tool Tip Functions | Control Message Handlers |
Update/Painting Functions | Timer Functions | Input Message Handlers |
Coordinate Mapping Functions | Alert Functions | Nonclient-Area Message Handlers |
Window Text Functions | Window Message Functions | MDI Message Handlers |
Scrolling Functions | Clipboard Functions | Clipboard Message Handlers |
Drag-Drop Functions | ActiveX Controls | Menu Loop Notification |
Caret Functions | Overridables |
Data Members
m_hWnd | Indicates the HWND attached to this CWnd. |
Construction/Destruction
CWnd | Constructs a CWnd object. |
DestroyWindow | Destroys the attached Windows window. |
Initialization
Create | Creates and initializes the child window associated with the CWnd object. |
PreCreateWindow | Called before the creation of the Windows window attached to this CWnd object. |
CalcWindowRect | Called to calculate the window rectangle from the client rectangle. |
GetStyle | Returns the current window style. |
GetExStyle | Returns the window’s extended style. |
Attach | Attaches a Windows handle to a CWnd object. |
Detach | Detaches a Windows handle from a CWnd object and returns the handle. |
PreSubclassWindow | Allows other necessary subclassing to occur before SubclassWindow is called. |
SubclassWindow | Attaches a window to a CWnd object and makes it route messages through the CWnd’s message map. |
UnsubclassWindow | Detaches a window from a CWnd object |
FromHandle | Returns a pointer to a CWnd object when given a handle to a window. If a CWnd object is not attached to the handle, a temporary CWnd object is created and attached. |
FromHandlePermanent | Returns a pointer to a CWnd object when given a handle to a window. If a CWnd object is not attached to the handle, NULL is returned. |
DeleteTempMap | Called automatically by the CWinApp idle-time handler and deletes any temporary CWnd objects created by FromHandle. |
GetSafeHwnd | Returns m_hWnd, or NULL if the this pointer is NULL. |
CreateEx | Creates a Windows overlapped, pop-up, or child window and attaches it to a CWnd object. |
CreateControl | Create an OLE control that will be represented in an MFC program by a CWnd object. |
Window State Functions
IsWindowEnabled | Determines whether the window is enabled for mouse and keyboard input. |
EnableWindow | Enables or disables mouse and keyboard input. |
GetActiveWindow | Retrieves the active window. |
SetActiveWindow | Activates the window. |
GetCapture | Retrieves the CWnd that has the mouse capture. |
SetCapture | Causes all subsequent mouse input to be sent to the CWnd. |
GetFocus | Retrieves the CWnd that currently has the input focus. |
SetFocus | Claims the input focus. |
GetDesktopWindow | Retrieves the Windows desktop window. |
GetForegroundWindow | Returns a pointer to the foreground window (the top-level window with which the user is currently working). |
SetForegroundWindow | Puts the thread that created the window into the foreground and activates the window. |
GetIcon | Retrieves the handle to an icon. |
SetIcon | Sets the handle to a specific icon. |
GetWindowContextHelpId | Retrieves the help context identifier. |
SetWindowContextHelpId | Sets the help context identifier. |
ModifyStyle | Modifies the current window style. |
ModifyStyleEx | Modifies the window’s extended style. |
Window Size and Position
GetWindowPlacement | Retrieves the show state and the normal (restored), minimized, and maximized positions of a window. |
SetWindowPlacement | Sets the show state and the normal (restored), minimized, and maximized positions for a window. |
GetWindowRgn | Retrieves a copy of the window region of a window. |
SetWindowRgn | Sets the region of a window. |
IsIconic | Determines whether CWnd is minimized (iconic). |
IsZoomed | Determines whether CWnd is maximized. |
MoveWindow | Changes the position and dimensions of CWnd. |
SetWindowPos | Changes the size, position, and ordering of child, pop-up, and top-level windows. |
ArrangeIconicWindows | Arranges all the minimized (iconic) child windows. |
BringWindowToTop | Brings CWnd to the top of a stack of overlapping windows. |
GetWindowRect | Gets the screen coordinates of CWnd. |
GetClientRect | Gets the dimensions of the CWnd client area. |
Window Access Functions
ChildWindowFromPoint | Determines which, if any, of the child windows contains the specified point. |
FindWindow | Returns the handle of the window, which is identified by its window name and window class. |
GetNextWindow | Returns the next (or previous) window in the window manager’s list. |
GetOwner | Retrieves a pointer to the owner of a CWnd. |
SetOwner | Changes the owner of a CWnd. |
GetTopWindow | Returns the first child window that belongs to the CWnd. |
GetWindow | Returns the window with the specified relationship to this window. |
GetLastActivePopup | Determines which pop-up window owned by CWnd was most recently active. |
IsChild | Indicates whether CWnd is a child window or other direct descendant of the specified window. |
GetParent | Retrieves the parent window of CWnd (if any). |
GetSafeOwner | Retrieves the safe owner for the given window. |
SetParent | Changes the parent window. |
WindowFromPoint | Identifies the window that contains the given point. |
GetDlgItem | Retrieves the control with the specified ID from the specified dialog box. |
GetDlgCtrlID | If the CWnd is a child window, calling this function returns its ID value. |
SetDlgCtrlID | Sets the window or control ID for the window (which can be any child window, not only a control in a dialog box). |
GetDescendantWindow | Searches all descendant windows and returns the window with the specified ID. |
GetParentFrame | Retrieves the CWnd object’s parent frame window. |
SendMessageToDescendants | Sends a message to all descendant windows of the window. |
GetTopLevelParent | Retrieves the window’s top-level parent. |
GetTopLevelOwner | Retrieves the top-level window. |
GetParentOwner | Returns a pointer to a child window’s parent window. |
GetTopLevelFrame | Retrieves the window’s top-level frame window. |
UpdateDialogControls | Call to update the state of dialog buttons and other controls. |
UpdateData | Initializes or retrieves data from a dialog box. |
CenterWindow | Centers a window relative to its parent. |
Update/Painting Functions
BeginPaint | Prepares CWnd for painting. |
EndPaint | Marks the end of painting. |
Draws the current window in the specified device context. | |
PrintClient | Draws any window in the specified device context (usually a printer device context). |
LockWindowUpdate | Disables or reenables drawing in the given window. |
UnlockWindowUpdate | Unlocks a window that was locked with CWnd::LockWindowUpdate. |
GetDC | Retrieves a display context for the client area. |
GetDCEx | Retrieves a display context for the client area, and enables clipping while drawing. |
RedrawWindow | Updates the specified rectangle or region in the client area. |
GetWindowDC | Retrieves the display context for the whole window, including the caption bar, menus, and scroll bars. |
ReleaseDC | Releases client and window device contexts, freeing them for use by other applications. |
UpdateWindow | Updates the client area. |
SetRedraw | Allows changes in CWnd to be redrawn or prevents changes from being redrawn. |
GetUpdateRect | Retrieves the coordinates of the smallest rectangle that completely encloses the CWnd update region. |
GetUpdateRgn | Retrieves the CWnd update region. |
Invalidate | Invalidates the entire client area. |
InvalidateRect | Invalidates the client area within the given rectangle by adding that rectangle to the current update region. |
InvalidateRgn | Invalidates the client area within the given region by adding that region to the current update region. |
ValidateRect | Validates the client area within the given rectangle by removing the rectangle from the current update region. |
ValidateRgn | Validates the client area within the given region by removing the region from the current update region. |
ShowWindow | Shows or hides the window. |
IsWindowVisible | Determines whether the window is visible. |
ShowOwnedPopups | Shows or hides all pop-up windows owned by the window. |
EnableScrollBar | Enables or disables one or both arrows of a scroll bar. |
Coordinate Mapping Functions
MapWindowPoints | Converts (maps) a set of points from the coordinate space of the CWnd to the coordinate space of another window. |
ClientToScreen | Converts the client coordinates of a given point or rectangle on the display to screen coordinates. |
ScreenToClient | Converts the screen coordinates of a given point or rectangle on the display to client coordinates. |
Window Text Functions
SetWindowText | Sets the window text or caption title (if it has one) to the specified text. |
GetWindowText | Returns the window text or caption title (if it has one). |
GetWindowTextLength | Returns the length of the window’s text or caption title. |
SetFont | Sets the current font. |
GetFont | Retrieves the current font. |
Scrolling Functions
GetScrollPos | Retrieves the current position of a scroll box. |
GetScrollRange | Copies the current minimum and maximum scroll-bar positions for the given scroll bar. |
ScrollWindow | Scrolls the contents of the client area. |
ScrollWindowEx | Scrolls the contents of the client area. Similar to ScrollWindow, with additional features. |
GetScrollInfo | Retrieves the information that the SCROLLINFO structure maintains about a scroll bar. |
GetScrollLimit | Retrieves the limit of the scroll bar. |
SetScrollInfo | Sets information about the scroll bar. |
SetScrollPos | Sets the current position of a scroll box and, if specified, redraws the scroll bar to reflect the new position. |
SetScrollRange | Sets minimum and maximum position values for the given scroll bar. |
ShowScrollBar | Displays or hides a scroll bar. |
EnableScrollBarCtrl | Enables or disables a sibling scroll-bar control. |
GetScrollBarCtrl | Returns a sibling scroll-bar control. |
RepositionBars | Repositions control bars in the client area. |
Drag-Drop Functions
DragAcceptFiles | Indicates the window will accept dragged files. |
Caret Functions
CreateCaret | Creates a new shape for the system caret and gets ownership of the caret. |
CreateSolidCaret | Creates a solid block for the system caret and gets ownership of the caret. |
CreateGrayCaret | Creates a gray block for the system caret and gets ownership of the caret. |
GetCaretPos | Retrieves the client coordinates of the caret’s current position. |
SetCaretPos | Moves the caret to a specified position. |
HideCaret | Hides the caret by removing it from the display screen. |
ShowCaret | Shows the caret on the display at the caret’s current position. Once shown, the caret begins flashing automatically. |
Dialog-Box Item Functions
CheckDlgButton | Places a check mark next to or removes a check mark from a button control. |
CheckRadioButton | Checks the specified radio button and removes the check mark from all other radio buttons in the specified group of buttons. |
GetCheckedRadioButton | Returns the ID of the currently checked radio button in a group of buttons. |
DlgDirList | Fills a list box with a file or directory listing. |
DlgDirListComboBox | Fills the list box of a combo box with a file or directory listing. |
DlgDirSelect | Retrieves the current selection from a list box. |
DlgDirSelectComboBox | Retrieves the current selection from the list box of a combo box. |
GetDlgItemInt | Translates the text of a control in the given dialog box to an integer value. |
GetDlgItemText | Retrieves the caption or text associated with a control. |
GetNextDlgGroupItem | Searches for the next (or previous) control within a group of controls. |
GetNextDlgTabItem | Retrieves the first control with the WS_TABSTOP style that follows (or precedes) the specified control. |
IsDlgButtonChecked | Determines whether a button control is checked. |
IsDialogMessage | Determines whether the given message is intended for the modeless dialog box and, if so, processes it. |
SendDlgItemMessage | Sends a message to the specified control. |
SetDlgItemInt | Sets the text of a control to the string that represents an integer value. |
SetDlgItemText | Sets the caption or text of a control in the specified dialog box. |
SubclassDlgItem | Attaches a Windows control to a CWnd object and makes it route messages through the CWnd’s message map. |
ExecuteDlgInit | Initiates a dialog resource. |
RunModalLoop | Retrieves, translates, or dispatches messages for a window that is in modal status. |
ContinueModal | Continues a window’s modal status. |
EndModalLoop | Ends a window’s modal status. |
Data-Binding Functions
BindDefaultProperty | Binds the calling object’s default simple bound property, as marked in the type library, to a cursor associated with a data-source control. |
BindProperty | Binds a cursour-bound property on a data-bound control to a data-source control and registers that relationship with the MFC binding manager. |
GetDSCCursor | Retrieves a pointer to the underlying cursor that is defined by the DataSource, UserName, Password, and SQL properties of a data-source control. |
Menu Functions
GetMenu | Retrieves a pointer to the specified menu. |
SetMenu | Sets the menu to the specified menu. |
DrawMenuBar | Redraws the menu bar. |
GetSystemMenu | Allows the application to access the Control menu for copying and modification. |
HiliteMenuItem | Highlights or removes the highlighting from a top-level (menu-bar) menu item. |
ToolTip Functions
EnableToolTips | Enables the tooltip control. |
CancelToolTips | Disables the tooltip control. |
FilterToolTipMessage | Retrieves the title or text associated with a control in a dialog box. |
OnToolHitTest | Detemines whether a point is in the bounding rectangle of the specified tool and retrieves information about the tool. |
Timer Functions
SetTimer | Installs a system timer that sends a WM_TIMER message when triggered. |
KillTimer | Kills a system timer. |
Alert Functions
FlashWindow | Flashes the window once. |
MessageBox | Creates and displays a window that contains an application-supplied message and caption. |
Window Message Functions
GetCurrentMessage | Returns a pointer to the message this window is currently processing. Should only be called when in an OnMessage message-handler member function. |
Default | Calls the default window procedure, which provides default processing for any window messages that an application does not process. |
PreTranslateMessage | Used by CWinApp to filter window messages before they are dispatched to the TranslateMessage and DispatchMessage Windows functions. |
SendMessage | Sends a message to the CWnd object and does not return until it has processed the message. |
PostMessage | Places a message in the application queue, then returns without waiting for the window to process the message. |
SendNotifyMessage | Sends the specified message to the window and returns as soon as possible, depending on whether the calling thread created the window. |
Clipboard Functions
ChangeClipboardChain | Removes CWnd from the chain of Clipboard viewers. |
SetClipboardViewer | Adds CWnd to the chain of windows that are notified whenever the contents of the Clipboard are changed. |
OpenClipboard | Opens the Clipboard. Other applications will not be able to modify the Clipboard until the Windows function is called. |
GetClipboardOwner | Retrieves a pointer to the current owner of the Clipboard. |
GetOpenClipboardWindow | Retrieves a pointer to the window that currently has the Clipboard open. |
GetClipboardViewer | Retrieves a pointer to the first window in the chain of Clipboard viewers. |
ActiveX Controls
SetProperty | Sets an ActiveX control property. |
OnAmbientProperty | Implement ambient property values. |
GetControlUnknown | Retrieves a pointer to an unknown ActiveX control. |
GetProperty | Retrieves an ActiveX control property. |
InvokeHelper | Invokes an ActiveX control method or property. |
Overridables
WindowProc | Provides a window procedure for a CWnd. The default dispatches messages through the message map. |
DefWindowProc | Calls the default window procedure, which provides default processing for any window messages that an application does not process. |
PostNcDestroy | This virtual function is called by the default OnNcDestroy function after the window has been destroyed. |
OnNotify | Called by the framework to inform a parent window an event has occurred in one of its controls or that the control needs information. |
OnChildNotify | Called by a parent window to give a notifying control a chance to respond to a control notification. |
DoDataExchange | For dialog data exchange and validation. Called by UpdateData. |
Initialization Message Handlers
OnInitMenu | Called when a menu is about to become active. |
OnInitMenuPopup | Called when a pop-up menu is about to become active. |
System Message Handlers
OnSysChar | Called when a keystroke translates to a system character. |
OnSysCommand | Called when the user selects a command from the Control menu, or when the user selects the Maximize or Minimize button. |
OnSysDeadChar | Called when a keystroke translates to a system dead character (such as accent characters). |
OnSysKeyDown | Called when the user holds down the ALT key and then presses another key. |
OnSysKeyUp | Called when the user releases a key that was pressed while the ALT key was held down. |
OnCompacting | Called when Windows detects that system memory is low. |
OnDevModeChange | Called for all top-level windows when the user changes device-mode settings. |
OnFontChange | Called when the pool of font resources changes. |
OnPaletteIsChanging | Informs other applications when an application is going to realize its logical palette. |
OnPaletteChanged | Called to allow windows that use a color palette to realize their logical palettes and update their client areas. |
OnSysColorChange | Called for all top-level windows when a change is made in the system color setting. |
OnWindowPosChanging | Called when the size, position, or Z-order is about to change as a result of a call to SetWindowPos or another window-management function. |
OnWindowPosChanged | Called when the size, position, or Z-order has changed as a result of a call to SetWindowPos or another window-management function. |
OnDropFiles | Called when the user releases the left mouse button over a window that has registered itself as the recipient of dropped files. |
OnSpoolerStatus | Called from Print Manager whenever a job is added to or removed from the Print Manager queue. |
OnTimeChange | Called for all top-level windows after the system time changes. |
OnWinIniChange | Called for all top-level windows after the Windows initialization file, WIN.INI, is changed. |
General Message Handlers
OnCommand | Called when the user selects a command. |
OnActivate | Called when CWnd is being activated or deactivated. |
OnActivateApp | Called when the application is about to be activated or deactivated. |
OnCancelMode | Called to allow CWnd to cancel any internal modes, such as mouse capture. |
OnChildActivate | Called for multiple document interface (MDI) child windows whenever the size or position of CWnd changes or CWnd is activated. |
OnClose | Called as a signal that CWnd should be closed. |
OnCopyData | Copies data from one application to another. |
OnCreate | Called as a part of window creation. |
OnCtlColor | Called if CWnd is the parent of a control when the control is about to be drawn. |
OnDestroy | Called when CWnd is being destroyed. |
OnEnable | Called when CWnd is enabled or disabled. |
OnEndSession | Called when the session is ending. |
OnEnterIdle | Called to inform an application’s main window procedure that a modal dialog box or a menu is entering an idle state. |
OnEraseBkgnd | Called when the window background needs erasing. |
OnGetMinMaxInfo | Called whenever Windows needs to know the maximized position or dimensions, or the minimum or maximum tracking size. |
OnIconEraseBkgnd | Called when CWnd is minimized (iconic) and the background of the icon must be filled before painting the icon. |
OnKillFocus | Called immediately before CWnd loses the input focus. |
OnMenuChar | Called when the user presses a menu mnemonic character that doesn’t match any of the predefined mnemonics in the current menu. |
OnMenuSelect | Called when the user selects a menu item. |
OnMove | Called after the position of the CWnd has been changed. |
OnMoving | Indicates that a user is moving a CWnd object. |
OnDeviceChange | Notifies an application or device driver of a change to the hardware configuration of a device or the computer. |
OnStyleChanged | Indicates that the Windows function has changed one or more of the window's styles. |
OnStyleChanging | Indicates that the Windows function is about to change one or more of the window's styles. |
OnPaint | Called to repaint a portion of the window. |
OnParentNotify | Called when a child window is created or destroyed, or when the user clicks a mouse button while the cursor is over the child window. |
OnQueryDragIcon | Called when a minimized (iconic) CWnd is about to be dragged by the user. |
OnQueryEndSession | Called when the user chooses to end the Windows session. |
OnQueryNewPalette | Informs CWnd that it is about to receive the input focus. |
OnQueryOpen | Called when CWnd is an icon and the user requests that the icon be opened. |
OnSetFocus | Called after CWnd gains the input focus. |
OnShowWindow | Called when CWnd is to be hidden or shown. |
OnSize | Called after the size of CWnd has changed. |
OnSizing | Indicates that the user is resizing the rectangle. |
OnStyleChanged | Indicates that one or more of the window's styles has changed. |
OnStyleChanging | Indicates that one or more of the window's styles is about to change. |
Control Message Handlers
OnCharToItem | Called by a child list box with the LBS_WANTKEYBOARDINPUT style in response to a WM_CHAR message. |
OnCompareItem | Called to determine the relative position of a new item in a child sorted owner-draw combo box or list box. |
OnDeleteItem | Called when an owner-draw child list box or combo box is destroyed or when items are removed from the control. |
OnDrawItem | Called when a visual aspect of an owner-draw child button control, combo-box control, list-box control, or menu needs to be drawn. |
OnDSCNotify | Called in response to an event that a data-source control fires when a control to which the data-source control is bound modifies or attempts to modify the underlying cursor. |
OnGetDlgCode | Called for a control so the control can process arrow-key and TAB-key input itself. |
OnMeasureItem | Called for an owner-draw child combo box, list box, or menu item when the control is created. CWnd informs Windows of the dimensions of the control. |
SendChildNotifyLastMsg | Provides a notification message to a child window, from the parent window, so the child window can handle a task. |
ReflectChildNotify | Helper function which reflects a message to its source. |
OnWndMsg | Indicates if a windows message was handled. |
ReflectLastMsg | Reflects the last message to the child window. |
OnVKeyToItem | Called by a list box owned by CWnd in response to a WM_KEYDOWN message. |
Input Message Handlers
OnChar | Called when a keystroke translates to a nonsystem character. |
OnDeadChar | Called when a keystroke translates to a nonsystem dead character (such as accent characters). |
OnHScroll | Called when the user clicks the horizontal scroll bar of CWnd. |
OnKeyDown | Called when a nonsystem key is pressed. |
OnKeyUp | Called when a nonsystem key is released. |
OnLButtonDblClk | Called when the user double-clicks the left mouse button. |
OnLButtonDown | Called when the user presses the left mouse button. |
OnLButtonUp | Called when the user releases the left mouse button. |
OnMButtonDblClk | Called when the user double-clicks the middle mouse button. |
OnMButtonDown | Called when the user presses the middle mouse button. |
OnMButtonUp | Called when the user releases the middle mouse button. |
OnMouseActivate | Called when the cursor is in an inactive window and the user presses a mouse button. |
OnMouseMove | Called when the mouse cursor moves. |
OnMouseWheel | Called when a user rotates the mouse wheel. Uses Windows NT 4.0 message handling. |
OnRegisteredMouseWheel | Called when a user rotates the mouse wheel. Uses Windows 95 and Windows NT 3.51 message-handling. |
OnRButtonDblClk | Called when the user double-clicks the right mouse button. |
OnRButtonDown | Called when the user presses the right mouse button. |
OnRButtonUp | Called when the user releases the right mouse button. |
OnSetCursor | Called if mouse input is not captured and the mouse causes cursor movement within a window. |
OnTimer | Called after each interval specified in SetTimer. |
OnVScroll | Called when the user clicks the window’s vertical scroll bar. |
OnCaptureChanged | Sends a message to the window that is losing the mouse capture. |
Nonclient-Area Message Handlers
OnNcActivate | Called when the nonclient area needs to be changed to indicate an active or inactive state. |
OnNcCalcSize | Called when the size and position of the client area need to be calculated. |
OnNcCreate | Called prior to OnCreate when the nonclient area is being created. |
OnNcDestroy | Called when the nonclient area is being destroyed. |
OnNcHitTest | Called by Windows every time the mouse is moved if CWnd contains the cursor or has captured mouse input with SetCapture. |
OnNcLButtonDblClk | Called when the user double-clicks the left mouse button while the cursor is within a nonclient area of CWnd. |
OnNcLButtonDown | Called when the user presses the left mouse button while the cursor is within a nonclient area of CWnd. |
OnNcLButtonUp | Called when the user releases the left mouse button while the cursor is within a nonclient area of CWnd. |
OnNcMButtonDblClk | Called when the user double-clicks the middle mouse button while the cursor is within a nonclient area of CWnd. |
OnNcMButtonDown | Called when the user presses the middle mouse button while the cursor is within a nonclient area of CWnd. |
OnNcMButtonUp | Called when the user releases the middle mouse button while the cursor is within a nonclient area of CWnd. |
OnNcMouseMove | Called when the cursor is moved within a nonclient area of CWnd. |
OnNcPaint | Called when the nonclient area needs painting. |
OnNcRButtonDblClk | Called when the user double-clicks the right mouse button while the cursor is within a nonclient area of CWnd. |
OnNcRButtonDown | Called when the user presses the right mouse button while the cursor is within a nonclient area of CWnd. |
OnNcRButtonUp | Called when the user releases the right mouse button while the cursor is within a nonclient area of CWnd. |
MDI Message Handlers
OnMDIActivate | Called when an MDI child window is activated or deactivated. |
Clipboard Message Handlers
OnAskCbFormatName | Called by a Clipboard viewer application when a Clipboard owner will display the Clipboard contents. |
OnChangeCbChain | Notifies that a specified window is being removed from the chain. |
OnDestroyClipboard | Called when the Clipboard is emptied through a call to the Windows function. |
OnDrawClipboard | Called when the contents of the change. |
OnHScrollClipboard | Called when a Clipboard owner should scroll the Clipboard image, invalidate the appropriate section, and update the scroll-bar values. |
OnPaintClipboard | Called when the client area of the Clipboard viewer needs repainting. |
OnRenderAllFormats | Called when the owner application is being destroyed and needs to render all its formats. |
OnRenderFormat | Called for the Clipboard owner when a particular format with delayed rendering needs to be rendered. |
OnSizeClipboard | Called when the size of the client area of the Clipboard-viewer window has changed. |
OnVScrollClipboard | Called when the owner should scroll the Clipboard image, invalidate the appropriate section, and update the scroll-bar values. |
Menu Loop Notification
OnEnterMenuLoop | Called when a menu modal loop has been entered. |
OnExitMenuLoop | Called when a menu modal loop has been exited. |