Window painting messages

Macros
#define	MSG_SHOWWINDOW   0x00A0
	Indicates that the window has been shown or hidden. More...
#define	MSG_ERASEBKGND   0x00B0 /* this is an async message */
	Sent to the window to erase the background. More...
#define	MSG_PAINT   0x00B1
	Sent to the window if the window contains an invalid region. More...
#define	MSG_NCPAINT   0x00B2
	Indicates that paints non-client area. More...
#define	MSG_NCACTIVATE   0x00B3
	Indicates that active non-client area of main window. More...
#define	MSG_SYNCPAINT   0x00B4
	Indicates that actives and paints main window synchronously. More...

Detailed Description

Macro Definition Documentation

#define MSG_ERASEBKGND   0x00B0 /* this is an async message */

Sent to the window to erase the background.

This message is sent to the window if the whole or a part of the background should be erased.

MSG_ERASEBKGND
HDC hdc = (HDC)wParam;
const RECT* inv_rect = (const RECT*)lParam;

Parameters

hdc	The device context.
inv_rect	The pointer to a RECT structure contains the rectangle should be erase. The rectangle is in client coordinates system. If it is NULL, the whole client area should be erased.

Definition at line 1331 of file window.h.

#define MSG_NCACTIVATE   0x00B3

Indicates that active non-client area of main window.

Definition at line 1369 of file window.h.

#define MSG_NCPAINT   0x00B2

Indicates that paints non-client area.

MSG_NCPAINT
HDC hdc = (HDC)wParam;
const RECT* inv_rect = (const RECT*)lParam;

Parameters

hdc	The device context.
inv_rect	The pointer to a RECT structure contains the rectangle should be paint. The rectangle is in client coordinates system. If it is NULL, the whole nc client area should be paint.

Definition at line 1363 of file window.h.

#define MSG_PAINT   0x00B1

Sent to the window if the window contains an invalid region.

This message is sent to the window if the window contains an invalid region.

MSG_PAINT
const CLIPRGN* inv_rgn = (const CLIPRGN*) lParam;

Parameters

inv_rgn

The pointer to the invalid region of the window.

Definition at line 1346 of file window.h.

#define MSG_SHOWWINDOW   0x00A0

Indicates that the window has been shown or hidden.

This message is sent to the window when the window has been shown or hidden (due to the calling of the function ShowWindow).

MSG_SHOWWINDOW
int show_cmd = (int)wParam;

Parameters

show_cmd

The command to show or hide, can be one of the following values: SW_SHOW Shows the window. SW_HIDE Hides the window. SW_SHOWNORMAL Shows the window, and if the window is a main window sets it to be the topmost main window.

See also

ShowWindow

Definition at line 1311 of file window.h.

#define MSG_SYNCPAINT   0x00B4

Indicates that actives and paints main window synchronously.

Definition at line 1375 of file window.h.