WM_SETICON Overview  Group

An application sends the WM_SETICON message to associate a new large or small icon with a window. Windows displays the large icon in the Alt+Tab dialog, and the small icon in the window caption.

WM_SETICON 

wParam = (WPARAM) fType;          // icon type

lParam = (LPARAM) (HICON) hicon;  // handle of icon

 

Parameters

fType

Value of wParam. Specifies the type of icon being set. This parameter can be one of the following values:

Value	Meaning
ICON_BIG	Set the large icon for the window.
ICON_SMALL	Set the small icon for the window.

hicon

Value of lParam. Identifies the new large or small icon. If this parameter is NULL, the icon indicated by fType is removed.

Return Values

The return value is the handle of the previous large or small icon, depending on the value of fType. It is NULL if the window previously had no icon of the type indicated by fType.

Default Action

The DefWindowProc function returns the handle of the previous large or small icon associated with the window, depending on the value of fType.

See Also

DefWindowProc, WM_GETICON