diff --git a/fpdfsdk/cfx_systemhandler.cpp b/fpdfsdk/cfx_systemhandler.cpp
index 8823511..6281b1b 100644
--- a/fpdfsdk/cfx_systemhandler.cpp
+++ b/fpdfsdk/cfx_systemhandler.cpp
@@ -132,15 +132,3 @@
 void CFX_SystemHandler::KillTimer(int32_t nID) {
   m_pFormFillEnv->KillTimer(nID);
 }
-
-bool CFX_SystemHandler::IsSHIFTKeyDown(uint32_t nFlag) const {
-  return !!m_pFormFillEnv->IsSHIFTKeyDown(nFlag);
-}
-
-bool CFX_SystemHandler::IsCTRLKeyDown(uint32_t nFlag) const {
-  return !!m_pFormFillEnv->IsCTRLKeyDown(nFlag);
-}
-
-bool CFX_SystemHandler::IsALTKeyDown(uint32_t nFlag) const {
-  return !!m_pFormFillEnv->IsALTKeyDown(nFlag);
-}
diff --git a/fpdfsdk/cfx_systemhandler.h b/fpdfsdk/cfx_systemhandler.h
index aa243c0..7402ac3 100644
--- a/fpdfsdk/cfx_systemhandler.h
+++ b/fpdfsdk/cfx_systemhandler.h
@@ -64,9 +64,6 @@
 
   int32_t SetTimer(int32_t uElapse, TimerCallback lpTimerFunc);
   void KillTimer(int32_t nID);
-  bool IsSHIFTKeyDown(uint32_t nFlag) const;
-  bool IsCTRLKeyDown(uint32_t nFlag) const;
-  bool IsALTKeyDown(uint32_t nFlag) const;
 
  private:
   CFX_UnownedPtr<CPDFSDK_FormFillEnvironment> const m_pFormFillEnv;
diff --git a/fpdfsdk/cpdfsdk_annothandlermgr.cpp b/fpdfsdk/cpdfsdk_annothandlermgr.cpp
index 2b089e5..9e649f6 100644
--- a/fpdfsdk/cpdfsdk_annothandlermgr.cpp
+++ b/fpdfsdk/cpdfsdk_annothandlermgr.cpp
@@ -29,13 +29,13 @@
 CPDFSDK_AnnotHandlerMgr::CPDFSDK_AnnotHandlerMgr(
     CPDFSDK_FormFillEnvironment* pFormFillEnv)
     : m_pBAAnnotHandler(pdfium::MakeUnique<CPDFSDK_BAAnnotHandler>()),
-      m_pWidgetHandler(pdfium::MakeUnique<CPDFSDK_WidgetHandler>(pFormFillEnv)),
+      m_pWidgetHandler(pdfium::MakeUnique<CPDFSDK_WidgetHandler>(pFormFillEnv))
 #ifdef PDF_ENABLE_XFA
+      ,
       m_pXFAWidgetHandler(
-          pdfium::MakeUnique<CPDFSDK_XFAWidgetHandler>(pFormFillEnv)),
+          pdfium::MakeUnique<CPDFSDK_XFAWidgetHandler>(pFormFillEnv))
 #endif  // PDF_ENABLE_XFA
-      m_pFormFillEnv(pFormFillEnv) {
-  m_pWidgetHandler->SetFormFiller(m_pFormFillEnv->GetInteractiveFormFiller());
+{
 }
 
 CPDFSDK_AnnotHandlerMgr::~CPDFSDK_AnnotHandlerMgr() {}
@@ -205,16 +205,16 @@
 bool CPDFSDK_AnnotHandlerMgr::Annot_OnKeyDown(CPDFSDK_Annot* pAnnot,
                                               int nKeyCode,
                                               int nFlag) {
-  if (m_pFormFillEnv->IsCTRLKeyDown(nFlag) ||
-      m_pFormFillEnv->IsALTKeyDown(nFlag)) {
+  if (CPDFSDK_FormFillEnvironment::IsCTRLKeyDown(nFlag) ||
+      CPDFSDK_FormFillEnvironment::IsALTKeyDown(nFlag)) {
     return GetAnnotHandler(pAnnot)->OnKeyDown(pAnnot, nKeyCode, nFlag);
   }
 
   CPDFSDK_PageView* pPage = pAnnot->GetPageView();
   CPDFSDK_Annot* pFocusAnnot = pPage->GetFocusAnnot();
   if (pFocusAnnot && (nKeyCode == FWL_VKEY_Tab)) {
-    CPDFSDK_Annot::ObservedPtr pNext(
-        GetNextAnnot(pFocusAnnot, !m_pFormFillEnv->IsSHIFTKeyDown(nFlag)));
+    CPDFSDK_Annot::ObservedPtr pNext(GetNextAnnot(
+        pFocusAnnot, !CPDFSDK_FormFillEnvironment::IsSHIFTKeyDown(nFlag)));
     if (pNext && pNext.Get() != pFocusAnnot) {
       pPage->GetFormFillEnv()->SetFocusAnnot(&pNext);
       return true;
diff --git a/fpdfsdk/cpdfsdk_annothandlermgr.h b/fpdfsdk/cpdfsdk_annothandlermgr.h
index 5f6ff94..ff2556f 100644
--- a/fpdfsdk/cpdfsdk_annothandlermgr.h
+++ b/fpdfsdk/cpdfsdk_annothandlermgr.h
@@ -114,8 +114,6 @@
 #ifdef PDF_ENABLE_XFA
   std::unique_ptr<CPDFSDK_XFAWidgetHandler> m_pXFAWidgetHandler;
 #endif  // PDF_ENABLE_XFA
-
-  CFX_UnownedPtr<CPDFSDK_FormFillEnvironment> const m_pFormFillEnv;
 };
 
 #endif  // FPDFSDK_CPDFSDK_ANNOTHANDLERMGR_H_
diff --git a/fpdfsdk/cpdfsdk_formfillenvironment.cpp b/fpdfsdk/cpdfsdk_formfillenvironment.cpp
index de79475..5c847fc 100644
--- a/fpdfsdk/cpdfsdk_formfillenvironment.cpp
+++ b/fpdfsdk/cpdfsdk_formfillenvironment.cpp
@@ -289,25 +289,6 @@
     m_pInfo->FFI_OnChange(m_pInfo);
 }
 
-bool CPDFSDK_FormFillEnvironment::IsSHIFTKeyDown(uint32_t nFlag) const {
-  return (nFlag & FWL_EVENTFLAG_ShiftKey) != 0;
-}
-
-bool CPDFSDK_FormFillEnvironment::IsCTRLKeyDown(uint32_t nFlag) const {
-  return (nFlag & FWL_EVENTFLAG_ControlKey) != 0;
-}
-
-bool CPDFSDK_FormFillEnvironment::IsALTKeyDown(uint32_t nFlag) const {
-  return (nFlag & FWL_EVENTFLAG_AltKey) != 0;
-}
-
-FPDF_PAGE CPDFSDK_FormFillEnvironment::GetPage(UnderlyingDocumentType* document,
-                                               int nPageIndex) {
-  if (m_pInfo && m_pInfo->FFI_GetPage)
-    return m_pInfo->FFI_GetPage(m_pInfo, document, nPageIndex);
-  return nullptr;
-}
-
 FPDF_PAGE CPDFSDK_FormFillEnvironment::GetCurrentPage(
     UnderlyingDocumentType* document) {
   if (m_pInfo && m_pInfo->FFI_GetCurrentPage)
@@ -589,8 +570,7 @@
 }
 
 CPDFSDK_PageView* CPDFSDK_FormFillEnvironment::GetPageView(int nIndex) {
-  UnderlyingPageType* pTempPage =
-      UnderlyingFromFPDFPage(GetPage(m_pUnderlyingDoc.Get(), nIndex));
+  UnderlyingPageType* pTempPage = GetPage(nIndex);
   if (!pTempPage)
     return nullptr;
 
@@ -663,7 +643,10 @@
 }
 
 UnderlyingPageType* CPDFSDK_FormFillEnvironment::GetPage(int nIndex) {
-  return UnderlyingFromFPDFPage(GetPage(m_pUnderlyingDoc.Get(), nIndex));
+  if (!m_pInfo || !m_pInfo->FFI_GetPage)
+    return nullptr;
+  return UnderlyingFromFPDFPage(
+      m_pInfo->FFI_GetPage(m_pInfo, m_pUnderlyingDoc.Get(), nIndex));
 }
 
 CPDFSDK_InterForm* CPDFSDK_FormFillEnvironment::GetInterForm() {
diff --git a/fpdfsdk/cpdfsdk_formfillenvironment.h b/fpdfsdk/cpdfsdk_formfillenvironment.h
index b1e095a..c993740 100644
--- a/fpdfsdk/cpdfsdk_formfillenvironment.h
+++ b/fpdfsdk/cpdfsdk_formfillenvironment.h
@@ -47,6 +47,16 @@
                               FPDF_FORMFILLINFO* pFFinfo);
   ~CPDFSDK_FormFillEnvironment();
 
+  static bool IsSHIFTKeyDown(uint32_t nFlag) {
+    return !!(nFlag & FWL_EVENTFLAG_ShiftKey);
+  }
+  static bool IsCTRLKeyDown(uint32_t nFlag) {
+    return !!(nFlag & FWL_EVENTFLAG_ControlKey);
+  }
+  static bool IsALTKeyDown(uint32_t nFlag) {
+    return !!(nFlag & FWL_EVENTFLAG_AltKey);
+  }
+
   CPDFSDK_PageView* GetPageView(UnderlyingPageType* pPage, bool renew);
   CPDFSDK_PageView* GetPageView(int nIndex);
   CPDFSDK_PageView* GetCurrentView();
@@ -74,8 +84,6 @@
   void SetChangeMark() { m_bChangeMask = true; }
   void ClearChangeMark() { m_bChangeMask = false; }
 
-  UnderlyingPageType* GetPage(int nIndex);
-
   void ProcJavascriptFun();
   bool ProcOpenAction();
 
@@ -88,11 +96,7 @@
   FX_SYSTEMTIME GetLocalTime() const;
 
   void OnChange();
-  bool IsSHIFTKeyDown(uint32_t nFlag) const;
-  bool IsCTRLKeyDown(uint32_t nFlag) const;
-  bool IsALTKeyDown(uint32_t nFlag) const;
 
-  FPDF_PAGE GetPage(UnderlyingDocumentType* document, int nPageIndex);
   FPDF_PAGE GetCurrentPage(UnderlyingDocumentType* document);
 
   void ExecuteNamedAction(const char* namedAction);
@@ -214,6 +218,8 @@
   CPDFSDK_InterForm* GetInterForm();              // Creates if not present.
 
  private:
+  UnderlyingPageType* GetPage(int nIndex);
+
   FPDF_FORMFILLINFO* const m_pInfo;
   std::unique_ptr<CPDFSDK_AnnotHandlerMgr> m_pAnnotHandlerMgr;
   std::unique_ptr<CPDFSDK_ActionHandler> m_pActionHandler;
diff --git a/fpdfsdk/cpdfsdk_interform.cpp b/fpdfsdk/cpdfsdk_interform.cpp
index ebbe02c..9ae2aa4 100644
--- a/fpdfsdk/cpdfsdk_interform.cpp
+++ b/fpdfsdk/cpdfsdk_interform.cpp
@@ -347,8 +347,8 @@
 
   CPDFSDK_ActionHandler* pActionHandler = m_pFormFillEnv->GetActionHandler();
   PDFSDK_FieldAction fa;
-  fa.bModifier = m_pFormFillEnv->IsCTRLKeyDown(0);
-  fa.bShift = m_pFormFillEnv->IsSHIFTKeyDown(0);
+  fa.bModifier = false;
+  fa.bShift = false;
   fa.sValue = csValue;
   pActionHandler->DoAction_FieldJavaScript(
       action, CPDF_AAction::KeyStroke, m_pFormFillEnv.Get(), pFormField, fa);
@@ -367,8 +367,8 @@
 
   CPDFSDK_ActionHandler* pActionHandler = m_pFormFillEnv->GetActionHandler();
   PDFSDK_FieldAction fa;
-  fa.bModifier = m_pFormFillEnv->IsCTRLKeyDown(0);
-  fa.bShift = m_pFormFillEnv->IsSHIFTKeyDown(0);
+  fa.bModifier = false;
+  fa.bShift = false;
   fa.sValue = csValue;
   pActionHandler->DoAction_FieldJavaScript(
       action, CPDF_AAction::Validate, m_pFormFillEnv.Get(), pFormField, fa);
diff --git a/fpdfsdk/cpdfsdk_widgethandler.cpp b/fpdfsdk/cpdfsdk_widgethandler.cpp
index 6092500..d916567 100644
--- a/fpdfsdk/cpdfsdk_widgethandler.cpp
+++ b/fpdfsdk/cpdfsdk_widgethandler.cpp
@@ -25,7 +25,8 @@
 
 CPDFSDK_WidgetHandler::CPDFSDK_WidgetHandler(
     CPDFSDK_FormFillEnvironment* pFormFillEnv)
-    : m_pFormFillEnv(pFormFillEnv), m_pFormFiller(nullptr) {}
+    : m_pFormFillEnv(pFormFillEnv),
+      m_pFormFiller(pFormFillEnv->GetInteractiveFormFiller()) {}
 
 CPDFSDK_WidgetHandler::~CPDFSDK_WidgetHandler() {}
 
diff --git a/fpdfsdk/cpdfsdk_widgethandler.h b/fpdfsdk/cpdfsdk_widgethandler.h
index 9ef190f..aac3619 100644
--- a/fpdfsdk/cpdfsdk_widgethandler.h
+++ b/fpdfsdk/cpdfsdk_widgethandler.h
@@ -98,16 +98,13 @@
                          CPDFSDK_Annot::ObservedPtr* pNewAnnot) override;
 #endif  // PDF_ENABLE_XFA
 
-  void SetFormFiller(CFFL_InteractiveFormFiller* pFiller) {
-    m_pFormFiller = pFiller;
-  }
   CFFL_InteractiveFormFiller* GetFormFiller() const {
     return m_pFormFiller.Get();
   }
 
  private:
   CFX_UnownedPtr<CPDFSDK_FormFillEnvironment> const m_pFormFillEnv;
-  CFX_UnownedPtr<CFFL_InteractiveFormFiller> m_pFormFiller;
+  CFX_UnownedPtr<CFFL_InteractiveFormFiller> const m_pFormFiller;
 };
 
 #endif  // FPDFSDK_CPDFSDK_WIDGETHANDLER_H_
diff --git a/fpdfsdk/formfiller/cffl_interactiveformfiller.cpp b/fpdfsdk/formfiller/cffl_interactiveformfiller.cpp
index ee74b99..8a81f4c 100644
--- a/fpdfsdk/formfiller/cffl_interactiveformfiller.cpp
+++ b/fpdfsdk/formfiller/cffl_interactiveformfiller.cpp
@@ -124,8 +124,8 @@
       ASSERT(pPageView);
 
       PDFSDK_FieldAction fa;
-      fa.bModifier = m_pFormFillEnv->IsCTRLKeyDown(nFlag);
-      fa.bShift = m_pFormFillEnv->IsSHIFTKeyDown(nFlag);
+      fa.bModifier = CPDFSDK_FormFillEnvironment::IsCTRLKeyDown(nFlag);
+      fa.bShift = CPDFSDK_FormFillEnvironment::IsSHIFTKeyDown(nFlag);
       pWidget->OnAAction(CPDF_AAction::CursorEnter, fa, pPageView);
       m_bNotifying = false;
       if (!(*pAnnot))
@@ -158,8 +158,8 @@
       ASSERT(pPageView);
 
       PDFSDK_FieldAction fa;
-      fa.bModifier = m_pFormFillEnv->IsCTRLKeyDown(nFlag);
-      fa.bShift = m_pFormFillEnv->IsSHIFTKeyDown(nFlag);
+      fa.bModifier = CPDFSDK_FormFillEnvironment::IsCTRLKeyDown(nFlag);
+      fa.bShift = CPDFSDK_FormFillEnvironment::IsSHIFTKeyDown(nFlag);
       pWidget->OnAAction(CPDF_AAction::CursorExit, fa, pPageView);
       m_bNotifying = false;
       if (!(*pAnnot))
@@ -195,8 +195,8 @@
       ASSERT(pPageView);
 
       PDFSDK_FieldAction fa;
-      fa.bModifier = m_pFormFillEnv->IsCTRLKeyDown(nFlags);
-      fa.bShift = m_pFormFillEnv->IsSHIFTKeyDown(nFlags);
+      fa.bModifier = CPDFSDK_FormFillEnvironment::IsCTRLKeyDown(nFlags);
+      fa.bShift = CPDFSDK_FormFillEnvironment::IsSHIFTKeyDown(nFlags);
       pWidget->OnAAction(CPDF_AAction::ButtonDown, fa, pPageView);
       m_bNotifying = false;
       if (!(*pAnnot))
@@ -273,8 +273,8 @@
   ASSERT(pPageView);
 
   PDFSDK_FieldAction fa;
-  fa.bModifier = m_pFormFillEnv->IsCTRLKeyDown(nFlag);
-  fa.bShift = m_pFormFillEnv->IsSHIFTKeyDown(nFlag);
+  fa.bModifier = CPDFSDK_FormFillEnvironment::IsCTRLKeyDown(nFlag);
+  fa.bShift = CPDFSDK_FormFillEnvironment::IsSHIFTKeyDown(nFlag);
   pWidget->OnAAction(CPDF_AAction::ButtonUp, fa, pPageView);
   m_bNotifying = false;
   if (!(*pAnnot) || !IsValidAnnot(pPageView, pWidget))
@@ -386,8 +386,8 @@
       ASSERT(pPageView);
 
       PDFSDK_FieldAction fa;
-      fa.bModifier = m_pFormFillEnv->IsCTRLKeyDown(nFlag);
-      fa.bShift = m_pFormFillEnv->IsSHIFTKeyDown(nFlag);
+      fa.bModifier = CPDFSDK_FormFillEnvironment::IsCTRLKeyDown(nFlag);
+      fa.bShift = CPDFSDK_FormFillEnvironment::IsSHIFTKeyDown(nFlag);
       pFormFiller->GetActionData(pPageView, CPDF_AAction::GetFocus, fa);
       pWidget->OnAAction(CPDF_AAction::GetFocus, fa, pPageView);
       m_bNotifying = false;
@@ -437,8 +437,8 @@
   ASSERT(pPageView);
 
   PDFSDK_FieldAction fa;
-  fa.bModifier = m_pFormFillEnv->IsCTRLKeyDown(nFlag);
-  fa.bShift = m_pFormFillEnv->IsSHIFTKeyDown(nFlag);
+  fa.bModifier = CPDFSDK_FormFillEnvironment::IsCTRLKeyDown(nFlag);
+  fa.bShift = CPDFSDK_FormFillEnvironment::IsSHIFTKeyDown(nFlag);
   pFormFiller->GetActionData(pPageView, CPDF_AAction::LoseFocus, fa);
   pWidget->OnAAction(CPDF_AAction::LoseFocus, fa, pPageView);
   m_bNotifying = false;
@@ -607,8 +607,8 @@
   pWidget->ClearAppModified();
 
   PDFSDK_FieldAction fa;
-  fa.bModifier = m_pFormFillEnv->IsCTRLKeyDown(nFlag);
-  fa.bShift = m_pFormFillEnv->IsSHIFTKeyDown(nFlag);
+  fa.bModifier = CPDFSDK_FormFillEnvironment::IsCTRLKeyDown(nFlag);
+  fa.bShift = CPDFSDK_FormFillEnvironment::IsSHIFTKeyDown(nFlag);
   fa.bWillCommit = true;
   fa.bKeyDown = true;
   fa.bRC = true;
@@ -639,8 +639,8 @@
   pWidget->ClearAppModified();
 
   PDFSDK_FieldAction fa;
-  fa.bModifier = m_pFormFillEnv->IsCTRLKeyDown(nFlag);
-  fa.bShift = m_pFormFillEnv->IsSHIFTKeyDown(nFlag);
+  fa.bModifier = CPDFSDK_FormFillEnvironment::IsCTRLKeyDown(nFlag);
+  fa.bShift = CPDFSDK_FormFillEnvironment::IsSHIFTKeyDown(nFlag);
   fa.bKeyDown = true;
   fa.bRC = true;
 
@@ -708,8 +708,8 @@
   int nValueAge = pWidget->GetValueAge();
 
   PDFSDK_FieldAction fa;
-  fa.bModifier = m_pFormFillEnv->IsCTRLKeyDown(nFlag);
-  fa.bShift = m_pFormFillEnv->IsSHIFTKeyDown(nFlag);
+  fa.bModifier = CPDFSDK_FormFillEnvironment::IsCTRLKeyDown(nFlag);
+  fa.bShift = CPDFSDK_FormFillEnvironment::IsSHIFTKeyDown(nFlag);
 
   pWidget->OnXFAAAction(PDFSDK_XFA_Click, fa, pPageView);
   m_bNotifying = false;
@@ -738,8 +738,8 @@
   int nValueAge = pWidget->GetValueAge();
 
   PDFSDK_FieldAction fa;
-  fa.bModifier = m_pFormFillEnv->IsCTRLKeyDown(nFlag);
-  fa.bShift = m_pFormFillEnv->IsSHIFTKeyDown(nFlag);
+  fa.bModifier = CPDFSDK_FormFillEnvironment::IsCTRLKeyDown(nFlag);
+  fa.bShift = CPDFSDK_FormFillEnvironment::IsSHIFTKeyDown(nFlag);
 
   pWidget->OnXFAAAction(PDFSDK_XFA_Full, fa, pPageView);
   m_bNotifying = false;
@@ -789,8 +789,8 @@
   int nValueAge = pWidget->GetValueAge();
 
   PDFSDK_FieldAction fa;
-  fa.bModifier = m_pFormFillEnv->IsCTRLKeyDown(nFlag);
-  fa.bShift = m_pFormFillEnv->IsSHIFTKeyDown(nFlag);
+  fa.bModifier = CPDFSDK_FormFillEnvironment::IsCTRLKeyDown(nFlag);
+  fa.bShift = CPDFSDK_FormFillEnvironment::IsSHIFTKeyDown(nFlag);
 
   pWidget->OnXFAAAction(PDFSDK_XFA_PreOpen, fa, pPageView);
   m_bNotifying = false;
@@ -820,8 +820,8 @@
   int nValueAge = pWidget->GetValueAge();
 
   PDFSDK_FieldAction fa;
-  fa.bModifier = m_pFormFillEnv->IsCTRLKeyDown(nFlag);
-  fa.bShift = m_pFormFillEnv->IsSHIFTKeyDown(nFlag);
+  fa.bModifier = CPDFSDK_FormFillEnvironment::IsCTRLKeyDown(nFlag);
+  fa.bShift = CPDFSDK_FormFillEnvironment::IsSHIFTKeyDown(nFlag);
 
   pWidget->OnXFAAAction(PDFSDK_XFA_PostOpen, fa, pPageView);
   m_bNotifying = false;
@@ -879,8 +879,8 @@
       pData->pPageView->GetFormFillEnv();
 
   PDFSDK_FieldAction fa;
-  fa.bModifier = m_pFormFillEnv->IsCTRLKeyDown(nFlag);
-  fa.bShift = m_pFormFillEnv->IsSHIFTKeyDown(nFlag);
+  fa.bModifier = CPDFSDK_FormFillEnvironment::IsCTRLKeyDown(nFlag);
+  fa.bShift = CPDFSDK_FormFillEnvironment::IsSHIFTKeyDown(nFlag);
   fa.sChange = strChange;
   fa.sChangeEx = strChangeEx;
   fa.bKeyDown = bKeyDown;
diff --git a/fpdfsdk/pdfwindow/cpwl_wnd.cpp b/fpdfsdk/pdfwindow/cpwl_wnd.cpp
index ce5f4ee..663a763 100644
--- a/fpdfsdk/pdfwindow/cpwl_wnd.cpp
+++ b/fpdfsdk/pdfwindow/cpwl_wnd.cpp
@@ -802,18 +802,3 @@
   }
   m_bEnabled = bEnable;
 }
-
-bool CPWL_Wnd::IsCTRLpressed(uint32_t nFlag) const {
-  CFX_SystemHandler* pSystemHandler = GetSystemHandler();
-  return pSystemHandler && pSystemHandler->IsCTRLKeyDown(nFlag);
-}
-
-bool CPWL_Wnd::IsSHIFTpressed(uint32_t nFlag) const {
-  CFX_SystemHandler* pSystemHandler = GetSystemHandler();
-  return pSystemHandler && pSystemHandler->IsSHIFTKeyDown(nFlag);
-}
-
-bool CPWL_Wnd::IsALTpressed(uint32_t nFlag) const {
-  CFX_SystemHandler* pSystemHandler = GetSystemHandler();
-  return pSystemHandler && pSystemHandler->IsALTKeyDown(nFlag);
-}
diff --git a/fpdfsdk/pdfwindow/cpwl_wnd.h b/fpdfsdk/pdfwindow/cpwl_wnd.h
index 56fbb21..b22c5db 100644
--- a/fpdfsdk/pdfwindow/cpwl_wnd.h
+++ b/fpdfsdk/pdfwindow/cpwl_wnd.h
@@ -15,6 +15,7 @@
 #include "core/fxcrt/cfx_unowned_ptr.h"
 #include "core/fxcrt/fx_basic.h"
 #include "core/fxge/cfx_color.h"
+#include "fpdfsdk/cpdfsdk_formfillenvironment.h"
 #include "fpdfsdk/cpdfsdk_widget.h"
 #include "fpdfsdk/pdfwindow/cpwl_timer.h"
 #include "fpdfsdk/pdfwindow/cpwl_timer_handler.h"
@@ -298,9 +299,15 @@
   bool IsWndCaptureKeyboard(const CPWL_Wnd* pWnd) const;
   const CPWL_Wnd* GetRootWnd() const;
 
-  bool IsCTRLpressed(uint32_t nFlag) const;
-  bool IsSHIFTpressed(uint32_t nFlag) const;
-  bool IsALTpressed(uint32_t nFlag) const;
+  static bool IsCTRLpressed(uint32_t nFlag) {
+    return CPDFSDK_FormFillEnvironment::IsCTRLKeyDown(nFlag);
+  }
+  static bool IsSHIFTpressed(uint32_t nFlag) {
+    return CPDFSDK_FormFillEnvironment::IsSHIFTKeyDown(nFlag);
+  }
+  static bool IsALTpressed(uint32_t nFlag) {
+    return CPDFSDK_FormFillEnvironment::IsALTKeyDown(nFlag);
+  }
 
  private:
   CFX_PointF ParentToChild(const CFX_PointF& point) const;