--- mstools/samples/polydraw/polydraw.c	2018/08/09 18:20:38	1.1.1.1
+++ mstools/samples/polydraw/polydraw.c	2018/08/09 18:21:22	1.1.1.2
@@ -1,6 +1,10 @@
 /**************************************************************************\
 *  polydraw.c -- sample program demonstrating PolyDraw().
 *
+*         Steve Firebaugh
+*         Microsoft Developer Support
+*         Copyright (c) 1992 Microsoft Corporation
+*
 * The user is able to place control points on the screen, and then
 *  drag them.  The PolyDraw() call is made to dynamically show the
 *  resulting curve.
@@ -104,7 +108,7 @@ int APIENTRY WinMain(HINSTANCE hInstance
 *        PolyDraw (hdc, svPoints, svTypes, svNumDown+1);
 *
 \**************************************************************************/
-LRESULT MainWndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
+LRESULT CALLBACK MainWndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
 {
 static HANDLE hPenGrey, hPenLine, hPenpolydraw;
 static POINT svPoints [MAXPOINTS];
@@ -221,8 +225,8 @@ static int   svIndex;
         PolyDraw (hdc, &svPoints[1], &svTypes[1], svNumDown);
 
         /* Change the point to match the new mouse position. */
-        svPoints[svIndex].x = LOWORD(lParam);
-        svPoints[svIndex].y = HIWORD(lParam);
+        svPoints[svIndex].x = (int)(short)LOWORD(lParam);
+        svPoints[svIndex].y = (int)(short)HIWORD(lParam);
 
         MoveToEx (hdc, svPoints[0].x, svPoints[0].y, NULL);
         SelectObject(hdc, hPenLine);