Real mode context should always have V86 flag turned on.

dlls/winedos/dosvm.c

@@ -572,6 +572,9 @@ static WINE_EXCEPTION_FILTER(exception_handler)
 
 int WINAPI DOSVM_Enter( CONTEXT86 *context )
 {
+  /* Some callers forget to turn V86_FLAG on. */
+  context->EFlags |= V86_FLAG;
+
   __TRY
   {
     __wine_enter_vm86( context );

dlls/winedos/himem.c

@@ -175,6 +175,7 @@ void DOSVM_InitSegments( void )
         0x5D,                /* popw %bp */
         0x5A,                /* popw %dx */
         0x58,                /* popw %ax */
+        0xfb,                /* sti, enable and check virtual interrupts */
         0xCB                 /* lret */
     };
 

dlls/winedos/int31.c

@@ -583,15 +583,6 @@ static void StartPM( CONTEXT86 *context )
     TRACE("DOS program is now entering %d-bit protected mode\n", 
           DOSVM_IsDos32() ? 32 : 16);
 
-    /*
-     * Enable interrupts. Note that we also make a dummy 
-     * relay call in order to process all pending events. 
-     * This is needed in order to prevent event handling from
-     * getting stuck.
-     */
-    NtCurrentTeb()->dpmi_vif = 1;
-    DOSVM_BuildCallFrame( context, NULL, NULL );
-
     __TRY 
     {
         wine_call_to_16_regs_short(&pm_ctx, 0);

dlls/winedos/int33.c

@@ -91,10 +91,12 @@ void WINAPI DOSVM_Int33Handler( CONTEXT86 *context )
     SET_AX( context, mouse_info.but );
     break;
   case 0x07:
-    FIXME("Define horizontal mouse cursor range\n");
+    FIXME("Define horizontal mouse cursor range %d..%d\n",
+          CX_reg(context), DX_reg(context));
     break;
   case 0x08:
-    FIXME("Define vertical mouse cursor range\n");
+    FIXME("Define vertical mouse cursor range %d..%d\n",
+          CX_reg(context), DX_reg(context));
     break;
   case 0x09:
     FIXME("Define graphics mouse cursor\n");

dlls/winedos/vga.c

@@ -381,7 +381,9 @@ static void WINAPI VGA_DoSetMode(ULONG_PTR arg)
             return;
         }
         if (!vga_hwnd) {
-            vga_hwnd = CreateWindowExA(0,"STATIC","WINEDOS VGA",WS_POPUP|WS_VISIBLE,0,0,par->Xres,par->Yres,0,0,0,NULL);
+            vga_hwnd = CreateWindowExA(0,"STATIC","WINEDOS VGA",
+                                       WS_POPUP|WS_VISIBLE|SS_NOTIFY,0,0,
+                                       par->Xres,par->Yres,0,0,0,NULL);
             if (!vga_hwnd) {
                 ERR("Failed to create user window.\n");
                 IDirectDraw_Release(lpddraw);