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WINDOWPOS structure

Contains information about the size and position of a window.

Syntax


typedef struct tagWINDOWPOS {
  HWND hwnd;
  HWND hwndInsertAfter;
  int  x;
  int  y;
  int  cx;
  int  cy;
  UINT flags;
} WINDOWPOS, *LPWINDOWPOS, *PWINDOWPOS;

Members

hwnd

Type: HWND

A handle to the window.

hwndInsertAfter

Type: HWND

The position of the window in Z order (front-to-back position). This member can be a handle to the window behind which this window is placed, or can be one of the special values listed with the SetWindowPos function.

x

Type: int

The position of the left edge of the window.

y

Type: int

The position of the top edge of the window.

cx

Type: int

The window width, in pixels.

cy

Type: int

The window height, in pixels.

flags

Type: UINT

The window position. This member can be one or more of the following values.

ValueMeaning
SWP_DRAWFRAME
0x0020

Draws a frame (defined in the window's class description) around the window. Same as the SWP_FRAMECHANGED flag.

SWP_FRAMECHANGED
0x0020

Sends a WM_NCCALCSIZE message to the window, even if the window's size is not being changed. If this flag is not specified, WM_NCCALCSIZE is sent only when the window's size is being changed.

SWP_HIDEWINDOW
0x0080

Hides the window.

SWP_NOACTIVATE
0x0010

Does not activate the window. If this flag is not set, the window is activated and moved to the top of either the topmost or non-topmost group (depending on the setting of the hwndInsertAfter member).

SWP_NOCOPYBITS
0x0100

Discards the entire contents of the client area. If this flag is not specified, the valid contents of the client area are saved and copied back into the client area after the window is sized or repositioned.

SWP_NOMOVE
0x0002

Retains the current position (ignores the x and y members).

SWP_ NOOWNERZORDER
0x0200

Does not change the owner window's position in the Z order.

SWP_NOREDRAW
0x0008

Does not redraw changes. If this flag is set, no repainting of any kind occurs. This applies to the client area, the nonclient area (including the title bar and scroll bars), and any part of the parent window uncovered as a result of the window being moved. When this flag is set, the application must explicitly invalidate or redraw any parts of the window and parent window that need redrawing.

SWP_NOREPOSITION
0x0200

Does not change the owner window's position in the Z order. Same as the SWP_NOOWNERZORDER flag.

SWP_NOSENDCHANGING
0x0400

Prevents the window from receiving the WM_WINDOWPOSCHANGING message.

SWP_NOSIZE
0x0001

Retains the current size (ignores the cx and cy members).

SWP_NOZORDER
0x0004

Retains the current Z order (ignores the hwndInsertAfter member).

SWP_SHOWWINDOW
0x0040

Displays the window.

 

Requirements

Minimum supported client

Windows 2000 Professional [desktop apps only]

Minimum supported server

Windows 2000 Server [desktop apps only]

Header

Winuser.h (include Windows.h)

See also

Reference
EndDeferWindowPos
SetWindowPos
WM_NCCALCSIZE
Conceptual
Windows

 

 

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