WM_SIZE
The WM_SIZE
message is sent to a window after its size has changed.
WM_SIZE
fwSizeType = wParam; // resizing flag
nWidth = LOWORD(lParam); // width of client area
nHeight = HIWORD(lParam); // height of client area
Parameters
fwSizeType
Value of wParam.
Specifies the type of resizing requested. This parameter can be one of the
following values:
|
Value |
Meaning |
|
SIZE_MAXHIDE |
Message is
sent to all pop-up windows when some other window is maximized. |
|
SIZE_MAXIMIZED |
Window has
been maximized. |
|
SIZE_MAXSHOW |
Message is
sent to all pop-up windows when some other window has been restored to its
former size. |
|
SIZE_MINIMIZED |
Window has
been minimized. |
|
SIZE_RESTORED |
Window has
been resized, but neither the SIZE_MINIMIZED nor SIZE_MAXIMIZED value
applies. |
nWidth
Value of the
low-order word of lParam. Specifies the new width of the client area.
nHeight
Value of the
high-order word of lParam. Specifies the new height of the client area.
Return Values
If an
application processes this message, it should return zero.
Remarks
If the SetScrollPos or MoveWindow function is called for a
child window as a result of the WM_SIZE message, the bRedraw parameter
should be nonzero to cause the window to be repainted.
Although the
width and height of a window are 32-bit values, the nWidth and nHeight
parameters of the WM_SIZE message contain only the low-order 16 bits.
See Also