An application sends the WM_SETICON message to associate a new large or small icon with a window. Windows draws the large icon when the window is minimized, and the small icon in the window's title bar.
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