The Regular Windows OS Messages are categorized into a a number of sub
categories like Input Messages, General Messages, System Messages , non-client
area messages and clipboard messages. Some examples of these messages are listed
here below.
Input Messages
| WM_CHAR |
void OnChar(UINT, UINT, UINT);
invoked while a keystroke translates to a
non-system character.
|
| WM_HSCROLL |
void OnHScroll(UINT, UINT,UINT);
invoked when the user clicks the
horizontal scroll bar of CWnd window.
|
| WM_KEYDOWN |
void OnKeyDown(UINT,UINT,UINT);
invoked when a non-system key is
pressed.
|
| WM_KEYUP |
void OnKeyUp(UINT,UINT,UINT);
invoked when a non-system key is
released.
|
| WM_LBUTTONDBLCLK |
void OnLButtonDblClk(UINT, Cpoint);
invoked when the user
double-clicks the left mouse button.
|
| WM_LBUTTONDOWN |
void OnLButtonDown(UINT,CPoint);
invoked when the user presses
the left mouse button.
|
| WM_LBUTTONUP |
void OnLButtonUp(UINT, Cpoint);
invoked when the user releases the
left mouse button.
|
| WM_MOUSEMOVE |
void OnMouseMove(UINT,CPoint);
invoked when the mouse cursor moves.
|
| WM_RBUTTONDBLCLK |
void OnRButtonDblClk(UINT, Cpoint);
invoked when the user
double-clicks the right mouse button.
|
| WM_RBUTTONDOWN |
void OnRButtonDown(UINT,CPoint);
invoked when the user presses
the right mouse button.
|
| WM_RBUTTONUP |
void OnRButtonUp(UINT,CPoint);
invoked when the user releases the
right mouse button.
|
| WM_SETCURSOR |
BOOL OnSetCursor( CWnd*, UINT, UINT);
invoked only if mouse input
is not captured and the mouse causes cursor movement within a window.
|
| WM_TIMER |
void OnTimer(UINT);
invoked at specified interval in SetTimer.
|
| WM_VSCROLL |
void OnVScroll(UINT,UINT,CWnd*);
invoked when the user clicks the
window’s vertical scroll bar.
|
General Messages
| WM_ACTIVATE |
void OnActivate(UINT, CWnd*, BOOL);
invoked when CWnd object or the
window is being activated or deactivated.
|
| WM_ACTIVATEAPP |
void OnActivateApp(BOOL, HANDLE);
invoked when the application is
about to be activated.
|
| WM_CANCELMODE |
void OnCancelMode();
invoked to allow CWnd to cancel any internal
modes, such as mouse capture.
|
| WM_CLOSE |
void OnClose();
invoked to close the window or CWnd.
|
| WM_CREATE |
int OnCreate(LPCREATESTRUCT);
invoked as a part of window creation.
|
| WM_DESTROY |
void OnDestroy();
invoked when CWnd is being destroyed.
|
| WM_ENDSESSION |
void OnEndSession(BOOL);
invoked when the session is enabled or
disabled.
|
| WM_ENTERIDLE |
void OnEnterIdle(UINT, CWnd* );
invoked to inform an application’s
main window procedure that a modal dialog box or a menu is entering an idle
state.
|
| WM_ERASEBKGND |
BOOL OnEraseBkgnd(CDC*);
invoked when the window background needs
erasing.
|
| WM_GETMINMAXINFO |
void OnGetMinMaxInfo(LPPOINT);
invoked whenever Windows OS
needs to know the maximized position or dimensions, or the minimum or maximum
tracking size.
|
| WM_ICONERASEBKGND |
void OnIconEraseBkgnd(CDC*);
invoked when CWnd is minimized
and the background of the icon must be filled before painting the icon.
|
| WM_KILLFOCUS |
void OnKillFocus(CWnd* );
invoked immediately before CWnd loses the
input focus.
|
| WM_MOVE |
void OnMove(int, int);
invoked after the position of the CWnd or window
has been changed.
|
| WM_PAINT |
void OnPaint();
invoked to repaint a portion of the window.
|
| WM_QUERYENDSESSION |
BOOL OnQueryEndSession();
invoked when the user chooses to
end the Windows OS session.
|
| WM_QUERYNEWPALETTE |
BOOL OnQueryNewPalette();
informs CWnd that it is about to
receive input focus, so it can realize its palette.
|
| WM_SETFOCUS |
void OnSetFocus(CWnd* );
invoked after CWnd gains the input focus.
|
| WM_SHOWWINDOW |
void OnShowWindow(BOOL, UINT);
invoked when CWnd is to be hidden
or shown.
|
| WM_SIZE |
void OnSize(UINT, int, int);
invoked after the size of CWnd or window
has changed.
|
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