diff --git a/win32ss/gdi/eng/mouse.c b/win32ss/gdi/eng/mouse.c
index 1ea4ef827fe..ca70aacbcfd 100644
--- a/win32ss/gdi/eng/mouse.c
+++ b/win32ss/gdi/eng/mouse.c
@@ -425,7 +425,11 @@ EngSetPointerShape(
             /* Color bitmap must have the same format as the dest surface */
             if (psoColor->iBitmapFormat != pso->iBitmapFormat)
             {
-                DPRINT1("Screen surface and cursor color bitmap format don't match!.\n");
+                /* >>> DPRINT1 #10: el propio ya existente, pero amplíalo con los valores */
+                DPRINT1(
+                    "EngSetPointerShape: Screen surface and cursor color bitmap format don't match! "
+                    "psoColor->iBitmapFormat=%lu pso->iBitmapFormat=%lu\n",
+                    psoColor->iBitmapFormat, pso->iBitmapFormat);
                 goto failure;
             }
 
@@ -632,12 +636,41 @@ IntEngSetPointerShape(
 
     pfnSetPointerShape = GDIDEVFUNCS(pso).SetPointerShape;
 
+    /* >>> DPRINT1 #5: valor crudo del puntero de función y del SURFOBJ pantalla */
+    DPRINT1(
+        "IntEngSetPointerShape: pfnSetPointerShape=%p pso=%p pso->dhpdev=%p "
+        "pso->iBitmapFormat=%lu psoMask=%p psoColor=%p pxlo=%p xHot=%ld yHot=%ld x=%ld y=%ld fl=0x%08lx\n",
+        pfnSetPointerShape, pso, pso->dhpdev, pso->iBitmapFormat, psoMask, psoColor, pxlo, xHot, yHot, x, y, fl);
+
     if (pfnSetPointerShape)
     {
         /* Drivers expect to get an XLATEOBJ */
         if (pxlo == NULL)
             pxlo = &gexloTrivial.xlo;
 
+        /* >>> DPRINT1 #6: dump detallado de psoMask/psoColor justo antes de cruzar al driver */
+        if (psoMask)
+            DPRINT1(
+                "IntEngSetPointerShape: psoMask -> iBitmapFormat=%lu sizlBitmap=(%ld,%ld) "
+                "lDelta=%ld pvScan0=%p pvBits=%p\n",
+                psoMask->iBitmapFormat, psoMask->sizlBitmap.cx, psoMask->sizlBitmap.cy, psoMask->lDelta,
+                psoMask->pvScan0, psoMask->pvBits);
+        if (psoColor)
+            DPRINT1(
+                "IntEngSetPointerShape: psoColor -> iBitmapFormat=%lu sizlBitmap=(%ld,%ld) "
+                "lDelta=%ld pvScan0=%p pvBits=%p (screen fmt=%lu -> %s)\n",
+                psoColor->iBitmapFormat, psoColor->sizlBitmap.cx, psoColor->sizlBitmap.cy, psoColor->lDelta,
+                psoColor->pvScan0, psoColor->pvBits, pso->iBitmapFormat,
+                psoColor->iBitmapFormat == pso->iBitmapFormat ? "COINCIDE" : "*** NO COINCIDE ***");
+
+        DPRINT1(
+            "IntEngSetPointerShape: pxlo=%p flXlate=0x%08lx cEntries=%lu iSrcType=%lu iDstType=%lu\n", pxlo,
+            pxlo->flXlate, pxlo->cEntries, pxlo->iSrcType, pxlo->iDstType);
+
+        /* >>> DPRINT1 #7: justo antes de la llamada indirecta — última línea segura antes del posible BSOD */
+        DPRINT1("IntEngSetPointerShape: ---> ENTRANDO al driver DrvSetPointerShape en %p\n", pfnSetPointerShape);
+
+
         /* Call the driver */
         ulResult = pfnSetPointerShape(pso,
                                       psoMask,
@@ -650,12 +683,21 @@ IntEngSetPointerShape(
                                       prcl,
                                       fl);
 
+
+        /* >>> DPRINT1 #8: si esto se imprime, el driver volvió con vida */
+        DPRINT1("IntEngSetPointerShape: <--- SALIÓ del driver, ulResult=%lu\n", ulResult);
+
         /* Check if the driver accepted it */
         if (ulResult == SPS_ACCEPT_NOEXCLUDE)
             bHardwarePointer = TRUE;
 
         bSoftwarePointer = !bHardwarePointer;
     }
+    else
+    {
+        /* >>> DPRINT1 #9: no hay función de driver instalada — se usará el cursor software */
+        DPRINT1("IntEngSetPointerShape: pfnSetPointerShape es NULL, se usará EngSetPointerShape\n");
+    }
 
     if (bSoftwarePointer)
     {
@@ -745,7 +787,7 @@ GreSetPointerShape(
         psurfMask = NULL;
     }
 
-    /* Check for color bitmap */
+/* Check for color bitmap */
     if (hbmColor)
     {
         /* We have one, lock it */
@@ -755,11 +797,36 @@ GreSetPointerShape(
         {
             /* Create an XLATEOBJ, no mono support */
             EXLATEOBJ_vInitialize(&exlo, psurfColor->ppal, psurf->ppal, 0, 0, 0);
+
+            /* >>> DPRINT1 #1: estado del bitmap de color y de la paleta */
+            DPRINT1(
+                "GreSetPointerShape: hbmColor=%p psurfColor=%p iBitmapFormat=%lu "
+                "sizlBitmap=(%ld,%ld) lDelta=%ld pvScan0=%p ppalColor=%p ppalScreen=%p\n",
+                hbmColor, psurfColor, psurfColor->SurfObj.iBitmapFormat, psurfColor->SurfObj.sizlBitmap.cx,
+                psurfColor->SurfObj.sizlBitmap.cy, psurfColor->SurfObj.lDelta, psurfColor->SurfObj.pvScan0,
+                psurfColor->ppal, psurf->ppal);
+        }
+        else
+        {
+            /* >>> DPRINT1 #2: SURFACE_ShareLockSurface falló para hbmColor */
+            DPRINT1("GreSetPointerShape: SURFACE_ShareLockSurface(hbmColor=%p) devolvió NULL\n", hbmColor);
         }
     }
     else
         psurfColor = NULL;
 
+    /* >>> DPRINT1 #3: estado de la máscara y de la superficie de pantalla destino */
+DPRINT1(
+    "GreSetPointerShape: hbmMask=%p psurfMask=%p psurf(screen)=%p "
+    "screen.iBitmapFormat=%lu screen.sizlBitmap=(%ld,%ld) fl=0x%08lx\n",
+    hbmMask,
+    psurfMask,
+    psurf,
+    psurf->SurfObj.iBitmapFormat,
+    psurf->SurfObj.sizlBitmap.cx,
+    psurf->SurfObj.sizlBitmap.cy,
+    fl);
+
     /* We must have a valid surface in case of alpha bitmap */
     ASSERT(((fl & SPS_ALPHA) && psurfColor) || !(fl & SPS_ALPHA));
 
@@ -775,6 +842,16 @@ GreSetPointerShape(
                                      &pdc->ppdev->Pointer.Exclude,
                                      fl | SPS_CHANGE);
 
+    /* >>> DPRINT1 #4: resultado devuelto por toda la cadena */
+    DPRINT1(
+        "GreSetPointerShape: IntEngSetPointerShape devolvió ulResult=%lu "
+        "(%s)\n",
+        ulResult,
+        ulResult == SPS_ACCEPT_NOEXCLUDE ? "SPS_ACCEPT_NOEXCLUDE"
+        : ulResult == SPS_DECLINE        ? "SPS_DECLINE"
+        : ulResult == SPS_ERROR          ? "SPS_ERROR"
+                                         : "?");
+
     /* Cleanup */
     if (psurfColor)
     {