--- mstools/samples/showdib/showdib.c	2018/08/09 18:20:01	1.1
+++ mstools/samples/showdib/showdib.c	2018/08/09 18:20:43	1.1.1.2
@@ -960,7 +960,7 @@ BOOL MenuCommand (
 		/* Initiate the timer so that palette can be animated in
 		 * response to a WM_TIMER message
 		 */
-		if (nAnimating && !SetTimer(hWnd, 1, 250, (WNDPROC)(LPSTR) NULL))
+		if (nAnimating && !SetTimer(hWnd, 1, 250, (TIMERPROC)(LPSTR) NULL))
 			nAnimating = 0;
 
 	default: