diff --git a/fpdfsdk/formfiller/cffl_interactiveformfiller.cpp b/fpdfsdk/formfiller/cffl_interactiveformfiller.cpp
index d318111..d718e7c 100644
--- a/fpdfsdk/formfiller/cffl_interactiveformfiller.cpp
+++ b/fpdfsdk/formfiller/cffl_interactiveformfiller.cpp
@@ -839,16 +839,16 @@
   return pPageView && pPageView->IsValidAnnot(pAnnot->GetPDFAnnot());
 }
 
-void CFFL_InteractiveFormFiller::OnBeforeKeyStroke(
+std::pair<bool, bool> CFFL_InteractiveFormFiller::OnBeforeKeyStroke(
     void* pPrivateData,
     CFX_WideString& strChange,
     const CFX_WideString& strChangeEx,
     int nSelStart,
     int nSelEnd,
     bool bKeyDown,
-    bool& bRC,
-    bool& bExit,
     uint32_t nFlag) {
+  bool bRC = true;
+  bool bExit = false;
   CFFL_PrivateData* pData = reinterpret_cast<CFFL_PrivateData*>(pPrivateData);
   ASSERT(pData->pWidget);
 
@@ -857,18 +857,15 @@
 #ifdef PDF_ENABLE_XFA
   if (pFormFiller->IsFieldFull(pData->pPageView)) {
     CPDFSDK_Annot::ObservedPtr pObserved(pData->pWidget);
-    if (OnFull(&pObserved, pData->pPageView, nFlag) || !pObserved) {
-      bExit = true;
-      return;
-    }
+    if (OnFull(&pObserved, pData->pPageView, nFlag) || !pObserved)
+      return {bRC, true};
   }
 #endif  // PDF_ENABLE_XFA
 
-  if (m_bNotifying)
-    return;
-
-  if (!pData->pWidget->GetAAction(CPDF_AAction::KeyStroke).GetDict())
-    return;
+  if (m_bNotifying ||
+      !pData->pWidget->GetAAction(CPDF_AAction::KeyStroke).GetDict()) {
+    return {bRC, bExit};
+  }
 
   CFX_AutoRestorer<bool> restorer(&m_bNotifying);
   m_bNotifying = true;
@@ -897,13 +894,11 @@
                                  pData->pPageView)) {
     if (!IsValidAnnot(pData->pPageView, pData->pWidget))
       bExit = true;
-    return;
+    return {bRC, bExit};
   }
 
-  if (!pObserved || !IsValidAnnot(pData->pPageView, pData->pWidget)) {
-    bExit = true;
-    return;
-  }
+  if (!pObserved || !IsValidAnnot(pData->pPageView, pData->pWidget))
+    return {bRC, true};
 
   if (nAge != pData->pWidget->GetAppearanceAge()) {
     CPWL_Wnd* pWnd = pFormFiller->ResetPDFWindow(
@@ -919,8 +914,8 @@
   bRC = false;
 
   if (pFormFillEnv->GetFocusAnnot() == pData->pWidget)
-    return;
+    return {bRC, bExit};
 
   pFormFiller->CommitData(pData->pPageView, nFlag);
-  bExit = true;
+  return {bRC, true};
 }
diff --git a/fpdfsdk/formfiller/cffl_interactiveformfiller.h b/fpdfsdk/formfiller/cffl_interactiveformfiller.h
index 05fdf0d..fb141e1 100644
--- a/fpdfsdk/formfiller/cffl_interactiveformfiller.h
+++ b/fpdfsdk/formfiller/cffl_interactiveformfiller.h
@@ -9,6 +9,7 @@
 
 #include <map>
 #include <memory>
+#include <utility>
 
 #include "core/fxcrt/cfx_unowned_ptr.h"
 #include "fpdfsdk/cpdfsdk_annot.h"
@@ -129,15 +130,14 @@
                        float fPopupMax,
                        bool* bBottom,
                        float* fPopupRet) override;
-  void OnBeforeKeyStroke(void* pPrivateData,
-                         CFX_WideString& strChange,
-                         const CFX_WideString& strChangeEx,
-                         int nSelStart,
-                         int nSelEnd,
-                         bool bKeyDown,
-                         bool& bRC,
-                         bool& bExit,
-                         uint32_t nFlag) override;
+  // Returns {bRC, bExit}.
+  std::pair<bool, bool> OnBeforeKeyStroke(void* pPrivateData,
+                                          CFX_WideString& strChange,
+                                          const CFX_WideString& strChangeEx,
+                                          int nSelStart,
+                                          int nSelEnd,
+                                          bool bKeyDown,
+                                          uint32_t nFlag) override;
 #ifdef PDF_ENABLE_XFA
   bool OnPopupPreOpen(void* pPrivateData, uint32_t nFlag) override;
   bool OnPopupPostOpen(void* pPrivateData, uint32_t nFlag) override;
diff --git a/fpdfsdk/pdfwindow/cpwl_edit.cpp b/fpdfsdk/pdfwindow/cpwl_edit.cpp
index de21dac..a378156 100644
--- a/fpdfsdk/pdfwindow/cpwl_edit.cpp
+++ b/fpdfsdk/pdfwindow/cpwl_edit.cpp
@@ -586,8 +586,6 @@
 
   if (nChar == FWL_VKEY_Delete) {
     if (m_pFillerNotify) {
-      bool bRC = true;
-      bool bExit = false;
       CFX_WideString strChange;
       CFX_WideString strChangeEx;
 
@@ -597,9 +595,12 @@
 
       if (nSelStart == nSelEnd)
         nSelEnd = nSelStart + 1;
-      m_pFillerNotify->OnBeforeKeyStroke(GetAttachedData(), strChange,
-                                         strChangeEx, nSelStart, nSelEnd, true,
-                                         bRC, bExit, nFlag);
+
+      bool bRC;
+      bool bExit;
+      std::tie(bRC, bExit) = m_pFillerNotify->OnBeforeKeyStroke(
+          GetAttachedData(), strChange, strChangeEx, nSelStart, nSelEnd, true,
+          nFlag);
       if (!bRC)
         return false;
       if (bExit)
@@ -677,9 +678,9 @@
       }
 
       CFX_WideString strChangeEx;
-      m_pFillerNotify->OnBeforeKeyStroke(GetAttachedData(), swChange,
-                                         strChangeEx, nSelStart, nSelEnd, true,
-                                         bRC, bExit, nFlag);
+      std::tie(bRC, bExit) = m_pFillerNotify->OnBeforeKeyStroke(
+          GetAttachedData(), swChange, strChangeEx, nSelStart, nSelEnd, true,
+          nFlag);
     }
   }
 
diff --git a/fpdfsdk/pdfwindow/cpwl_edit.h b/fpdfsdk/pdfwindow/cpwl_edit.h
index 038aba9..ebf556a 100644
--- a/fpdfsdk/pdfwindow/cpwl_edit.h
+++ b/fpdfsdk/pdfwindow/cpwl_edit.h
@@ -7,6 +7,8 @@
 #ifndef FPDFSDK_PDFWINDOW_CPWL_EDIT_H_
 #define FPDFSDK_PDFWINDOW_CPWL_EDIT_H_
 
+#include <utility>
+
 #include "core/fpdfdoc/cpvt_wordrange.h"
 #include "core/fxcrt/cfx_unowned_ptr.h"
 #include "core/fxcrt/fx_basic.h"
@@ -22,15 +24,14 @@
                                float fPopupMax,
                                bool* bBottom,
                                float* fPopupRet) = 0;
-  virtual void OnBeforeKeyStroke(void* pPrivateData,
-                                 CFX_WideString& strChange,
-                                 const CFX_WideString& strChangeEx,
-                                 int nSelStart,
-                                 int nSelEnd,
-                                 bool bKeyDown,
-                                 bool& bRC,
-                                 bool& bExit,
-                                 uint32_t nFlag) = 0;
+  virtual std::pair<bool, bool> OnBeforeKeyStroke(
+      void* pPrivateData,
+      CFX_WideString& strChange,
+      const CFX_WideString& strChangeEx,
+      int nSelStart,
+      int nSelEnd,
+      bool bKeyDown,
+      uint32_t nFlag) = 0;
 #ifdef PDF_ENABLE_XFA
   virtual bool OnPopupPreOpen(void* pPrivateData, uint32_t nFlag) = 0;
   virtual bool OnPopupPostOpen(void* pPrivateData, uint32_t nFlag) = 0;
diff --git a/fpdfsdk/pdfwindow/cpwl_list_box.cpp b/fpdfsdk/pdfwindow/cpwl_list_box.cpp
index bd2bdb5..e3a2e77 100644
--- a/fpdfsdk/pdfwindow/cpwl_list_box.cpp
+++ b/fpdfsdk/pdfwindow/cpwl_list_box.cpp
@@ -305,15 +305,15 @@
   if (!m_pFillerNotify)
     return false;
 
-  bool bRC = true;
-  bool bExit = false;
   CFX_WideString swChange = GetText();
   CFX_WideString strChangeEx;
   int nSelStart = 0;
   int nSelEnd = swChange.GetLength();
-  m_pFillerNotify->OnBeforeKeyStroke(GetAttachedData(), swChange, strChangeEx,
-                                     nSelStart, nSelEnd, bKeyDown, bRC, bExit,
-                                     nFlag);
+  bool bRC;
+  bool bExit;
+  std::tie(bRC, bExit) = m_pFillerNotify->OnBeforeKeyStroke(
+      GetAttachedData(), swChange, strChangeEx, nSelStart, nSelEnd, bKeyDown,
+      nFlag);
   return bExit;
 }