--- mstools/samples/mandel/bndscan.c	2018/08/09 18:20:41	1.1
+++ mstools/samples/mandel/bndscan.c	2018/08/09 18:23:43	1.1.1.3
@@ -6,7 +6,7 @@
 * Created: 14-Apr-1992 10:59:52
 * Author: Petrus Wong
 *
-* Copyright (c) 1990 Microsoft Corporation
+* Copyright (c) 1993 Microsoft Corporation
 *
 * Dependencies:
 *
@@ -18,9 +18,6 @@
 #include "jtypes.h"
 #include "bndscan.h"
 
-extern LONG lMul(LONG, LONG);
-extern LONG lDiv(LONG, LONG);
-
 BOOL	bBoundaryScanFix(PINFO);
 LPPOINT pptTrace(LONG, LONG, PINFO, INT *, HDC);
 DWORD	dwGetNextBoundaryPoint(DWORD, POINT, LPPOINT, PINFO);
@@ -94,7 +91,7 @@ BOOL bBoundaryScanFix(PINFO pInfo)
 
 BOUNDTRACE:
 
-    SelectObject(hDC, hpnGreen);
+    SelectObject(hDC, hpnBlack);
     if ((lpPt = pptTrace(o, p, pInfo, &iCount, hDC)) == NULL)
     {
         m = o+1;
@@ -152,10 +149,11 @@ BOUNDTRACE:
 
 #if 0
         //
-        // SelectClipPath doesn't seem to work at this time
+        // Can't use SelectClipPath to set the clipping region here
+        // because we are on a different thread.  This is only a cached DC.
         //
         if (SelectClipPath(hDC, RGN_COPY)) {
-            //
+
             // Testing if the clip region is effective or not
             //
             //MoveToEx(hDC, 0, 0, NULL);
@@ -166,24 +164,14 @@ BOUNDTRACE:
     }
 
     if (pInfo->hRgnPath != (HRGN) NULL) {
-        if (SelectClipRgn(hDC, pInfo->hRgnPath) == ERROR) {
-            sprintf( gtext,"Error in Selecting clip region\n");
-            OutputDebugString( gtext );
-            goto EXIT;
-        }
         //
-        // Testing if the clip region is effective or not
+        // let the main thread who owns the DC to set the clipping region.
         //
-        //MoveToEx(hDC, 0, 0, NULL);
-        //GetClientRect(pInfo->hwnd, &rc);
-        //LineTo(hDC, rc.right, rc.bottom);
+        SendMessage(ghwndMain, WM_COMMAND, MM_SELCLIPRGN, 0L);
     }
 
-
-EXIT:
-
     pInfo->dwElapsed = GetTickCount() - dwTick1;
-    pInfo->hBmpSaved = SaveBitmap(pInfo->hwnd);
+    pInfo->hBmpSaved = SaveBitmap(pInfo->hwnd, pInfo->hPal);
     pInfo->bDrawing = FALSE;
 
     ReleaseDC(pInfo->hwnd, hDC);
@@ -192,9 +180,6 @@ EXIT:
     //
     GlobalFree((HANDLE) lpPt);
     ExitThread(0);
-    if (!CloseHandle(pInfo->hThrd))
-         MessageBox(ghwndMain, "Failed in CloseHandle!", "Error", MB_OK);
-
     return TRUE;
 }
 
@@ -364,6 +349,7 @@ DWORD dwGetNextBoundaryPoint(DWORD dwFac
 * Warnings:
 *
 * History:
+*  16-Feb-1993      Petrus Wong     9.23 fix
 *  20-Feb-1992 -by- Petrus Wong
 * Wrote it.
 \**************************************************************************/
@@ -390,7 +376,7 @@ BOOL bEscape(POINT Pt, LONG x, LONG y, L
         y = y1;                             //    2       2     2 1/2     2
         z = lMul(x, x) + lMul(y, y);        // |Z|  = ((x1  + x2 )   ) > 2
 
-        if (z > 8192) {
+        if (z > 33554432) {
             bEscape = TRUE;
             break;
         }