The EN_REQUESTRESIZE notification message notifies a rich edit control's parent window that the control's contents are either smaller or larger than the control's window size. A rich edit control sends this notification message in the form of a WM_NOTIFY message.
EN_REQUESTRESIZE
wParam = (WPARAM) (UINT) uID;
lParam = (LPARAM) (REQRESIZE FAR *) lpReSize;
Parameters
uID
Identifier of the rich edit control.
lpReSize
Pointer to a REQRESIZE structure.
Return Values
No return value.
Remarks
To support the bottomless behavior of a rich edit control, the parent window must resize the control when it receives this notification message.
See Also