Window painting messages
[Messages]

Defines

• #define MSG_SHOWWINDOW   0x00A0

  Indicates that the window has been shown or hidden.
  

• #define MSG_ERASEBKGND   0x00B0

  Sent to the window to erase the background.
  

• #define MSG_PAINT   0x00B1

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

• #define MSG_NCPAINT   0x00B2

  Indicates that paints non-client area.
  

• #define MSG_NCACTIVATE   0x00B3

  Indicates that active non-client area of main window.
  

• #define MSG_SYNCPAINT   0x00B4

  Indicates that actives and paints main window synchronously.
  

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Define Documentation

#define MSG_ERASEBKGND   0x00B0

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 const RECT* inv_rect = (const RECT*)lParam; Parameters: 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 1145 of file window.h.

#define MSG_NCACTIVATE   0x00B3

Indicates that active non-client area of main window. Definition at line 1172 of file window.h.

#define MSG_NCPAINT   0x00B2

Indicates that paints non-client area. Definition at line 1166 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 1160 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 1127 of file window.h.

#define MSG_SYNCPAINT   0x00B4

Indicates that actives and paints main window synchronously. Definition at line 1177 of file window.h.

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