diff --git a/fpdfsdk/formfiller/cffl_checkbox.cpp b/fpdfsdk/formfiller/cffl_checkbox.cpp
index fbf6c34..a40cfc6 100644
--- a/fpdfsdk/formfiller/cffl_checkbox.cpp
+++ b/fpdfsdk/formfiller/cffl_checkbox.cpp
@@ -24,8 +24,8 @@
 std::unique_ptr<CPWL_Wnd> CFFL_CheckBox::NewPWLWindow(
     const CPWL_Wnd::CreateParams& cp,
     std::unique_ptr<CPWL_Wnd::PrivateData> pAttachedData) {
-  auto pWnd = pdfium::MakeUnique<CPWL_CheckBox>(std::move(pAttachedData));
-  pWnd->Realize(cp);
+  auto pWnd = pdfium::MakeUnique<CPWL_CheckBox>(cp, std::move(pAttachedData));
+  pWnd->Realize();
   pWnd->SetCheck(m_pWidget->IsChecked());
   return std::move(pWnd);
 }
diff --git a/fpdfsdk/formfiller/cffl_combobox.cpp b/fpdfsdk/formfiller/cffl_combobox.cpp
index 358596e..f163c78 100644
--- a/fpdfsdk/formfiller/cffl_combobox.cpp
+++ b/fpdfsdk/formfiller/cffl_combobox.cpp
@@ -47,9 +47,9 @@
 std::unique_ptr<CPWL_Wnd> CFFL_ComboBox::NewPWLWindow(
     const CPWL_Wnd::CreateParams& cp,
     std::unique_ptr<CPWL_Wnd::PrivateData> pAttachedData) {
-  auto pWnd = pdfium::MakeUnique<CPWL_ComboBox>(std::move(pAttachedData));
+  auto pWnd = pdfium::MakeUnique<CPWL_ComboBox>(cp, std::move(pAttachedData));
   pWnd->AttachFFLData(this);
-  pWnd->Realize(cp);
+  pWnd->Realize();
 
   CFFL_InteractiveFormFiller* pFormFiller =
       m_pFormFillEnv->GetInteractiveFormFiller();
diff --git a/fpdfsdk/formfiller/cffl_listbox.cpp b/fpdfsdk/formfiller/cffl_listbox.cpp
index e601c83..0b67ab0 100644
--- a/fpdfsdk/formfiller/cffl_listbox.cpp
+++ b/fpdfsdk/formfiller/cffl_listbox.cpp
@@ -42,9 +42,9 @@
 std::unique_ptr<CPWL_Wnd> CFFL_ListBox::NewPWLWindow(
     const CPWL_Wnd::CreateParams& cp,
     std::unique_ptr<CPWL_Wnd::PrivateData> pAttachedData) {
-  auto pWnd = pdfium::MakeUnique<CPWL_ListBox>(std::move(pAttachedData));
+  auto pWnd = pdfium::MakeUnique<CPWL_ListBox>(cp, std::move(pAttachedData));
   pWnd->AttachFFLData(this);
-  pWnd->Realize(cp);
+  pWnd->Realize();
   pWnd->SetFillerNotify(m_pFormFillEnv->GetInteractiveFormFiller());
 
   for (int32_t i = 0, sz = m_pWidget->CountOptions(); i < sz; i++)
diff --git a/fpdfsdk/formfiller/cffl_pushbutton.cpp b/fpdfsdk/formfiller/cffl_pushbutton.cpp
index d7a4218..4f80593 100644
--- a/fpdfsdk/formfiller/cffl_pushbutton.cpp
+++ b/fpdfsdk/formfiller/cffl_pushbutton.cpp
@@ -20,7 +20,7 @@
 std::unique_ptr<CPWL_Wnd> CFFL_PushButton::NewPWLWindow(
     const CPWL_Wnd::CreateParams& cp,
     std::unique_ptr<CPWL_Wnd::PrivateData> pAttachedData) {
-  auto pWnd = pdfium::MakeUnique<CPWL_PushButton>(std::move(pAttachedData));
-  pWnd->Realize(cp);
+  auto pWnd = pdfium::MakeUnique<CPWL_PushButton>(cp, std::move(pAttachedData));
+  pWnd->Realize();
   return std::move(pWnd);
 }
diff --git a/fpdfsdk/formfiller/cffl_radiobutton.cpp b/fpdfsdk/formfiller/cffl_radiobutton.cpp
index ffe1ee7..c8c65dc 100644
--- a/fpdfsdk/formfiller/cffl_radiobutton.cpp
+++ b/fpdfsdk/formfiller/cffl_radiobutton.cpp
@@ -23,8 +23,9 @@
 std::unique_ptr<CPWL_Wnd> CFFL_RadioButton::NewPWLWindow(
     const CPWL_Wnd::CreateParams& cp,
     std::unique_ptr<CPWL_Wnd::PrivateData> pAttachedData) {
-  auto pWnd = pdfium::MakeUnique<CPWL_RadioButton>(std::move(pAttachedData));
-  pWnd->Realize(cp);
+  auto pWnd =
+      pdfium::MakeUnique<CPWL_RadioButton>(cp, std::move(pAttachedData));
+  pWnd->Realize();
   pWnd->SetCheck(m_pWidget->IsChecked());
   return std::move(pWnd);
 }
diff --git a/fpdfsdk/formfiller/cffl_textfield.cpp b/fpdfsdk/formfiller/cffl_textfield.cpp
index 79f4f3d..76b2ec1 100644
--- a/fpdfsdk/formfiller/cffl_textfield.cpp
+++ b/fpdfsdk/formfiller/cffl_textfield.cpp
@@ -72,9 +72,9 @@
 std::unique_ptr<CPWL_Wnd> CFFL_TextField::NewPWLWindow(
     const CPWL_Wnd::CreateParams& cp,
     std::unique_ptr<CPWL_Wnd::PrivateData> pAttachedData) {
-  auto pWnd = pdfium::MakeUnique<CPWL_Edit>(std::move(pAttachedData));
+  auto pWnd = pdfium::MakeUnique<CPWL_Edit>(cp, std::move(pAttachedData));
   pWnd->AttachFFLData(this);
-  pWnd->Realize(cp);
+  pWnd->Realize();
   pWnd->SetFillerNotify(m_pFormFillEnv->GetInteractiveFormFiller());
 
   int32_t nMaxLen = m_pWidget->GetMaxLen();
diff --git a/fpdfsdk/pwl/cpwl_appstream.cpp b/fpdfsdk/pwl/cpwl_appstream.cpp
index 02541aa3..93bd3e7 100644
--- a/fpdfsdk/pwl/cpwl_appstream.cpp
+++ b/fpdfsdk/pwl/cpwl_appstream.cpp
@@ -683,10 +683,11 @@
   if (rcIcon.IsEmpty() || !pIconStream)
     return ByteString();
 
-  CPWL_Icon icon(nullptr);
-  CPWL_Wnd::CreateParams cp;  // No parent.
+  CPWL_Wnd::CreateParams cp;
   cp.dwFlags = PWS_VISIBLE;
-  icon.Realize(cp);
+
+  CPWL_Icon icon(cp, nullptr);
+  icon.Realize();
   icon.SetIconFit(&fit);
   icon.SetPDFStream(pIconStream);
   if (!icon.Move(rcIcon, false, false))
diff --git a/fpdfsdk/pwl/cpwl_button.cpp b/fpdfsdk/pwl/cpwl_button.cpp
index 766e8c4..9f746cf 100644
--- a/fpdfsdk/pwl/cpwl_button.cpp
+++ b/fpdfsdk/pwl/cpwl_button.cpp
@@ -10,8 +10,9 @@
 
 #include "fpdfsdk/pwl/cpwl_wnd.h"
 
-CPWL_Button::CPWL_Button(std::unique_ptr<PrivateData> pAttachedData)
-    : CPWL_Wnd(std::move(pAttachedData)) {}
+CPWL_Button::CPWL_Button(const CreateParams& cp,
+                         std::unique_ptr<PrivateData> pAttachedData)
+    : CPWL_Wnd(cp, std::move(pAttachedData)) {}
 
 CPWL_Button::~CPWL_Button() = default;
 
diff --git a/fpdfsdk/pwl/cpwl_button.h b/fpdfsdk/pwl/cpwl_button.h
index cf53ff9..5835b7a 100644
--- a/fpdfsdk/pwl/cpwl_button.h
+++ b/fpdfsdk/pwl/cpwl_button.h
@@ -13,7 +13,8 @@
 
 class CPWL_Button : public CPWL_Wnd {
  public:
-  explicit CPWL_Button(std::unique_ptr<PrivateData> pAttachedData);
+  CPWL_Button(const CreateParams& cp,
+              std::unique_ptr<PrivateData> pAttachedData);
   ~CPWL_Button() override;
 
   // CPWL_Wnd
diff --git a/fpdfsdk/pwl/cpwl_caret.cpp b/fpdfsdk/pwl/cpwl_caret.cpp
index 63fb1ce..4dfda8a 100644
--- a/fpdfsdk/pwl/cpwl_caret.cpp
+++ b/fpdfsdk/pwl/cpwl_caret.cpp
@@ -16,8 +16,9 @@
 
 #define PWL_CARET_FLASHINTERVAL 500
 
-CPWL_Caret::CPWL_Caret(std::unique_ptr<PrivateData> pAttachedData)
-    : CPWL_Wnd(std::move(pAttachedData)) {}
+CPWL_Caret::CPWL_Caret(const CreateParams& cp,
+                       std::unique_ptr<PrivateData> pAttachedData)
+    : CPWL_Wnd(cp, std::move(pAttachedData)) {}
 
 CPWL_Caret::~CPWL_Caret() = default;
 
diff --git a/fpdfsdk/pwl/cpwl_caret.h b/fpdfsdk/pwl/cpwl_caret.h
index c85a877..f576fe3 100644
--- a/fpdfsdk/pwl/cpwl_caret.h
+++ b/fpdfsdk/pwl/cpwl_caret.h
@@ -13,7 +13,8 @@
 
 class CPWL_Caret final : public CPWL_Wnd {
  public:
-  explicit CPWL_Caret(std::unique_ptr<PrivateData> pAttachedData);
+  CPWL_Caret(const CreateParams& cp,
+             std::unique_ptr<PrivateData> pAttachedData);
   ~CPWL_Caret() override;
 
   // CPWL_Wnd
diff --git a/fpdfsdk/pwl/cpwl_combo_box.cpp b/fpdfsdk/pwl/cpwl_combo_box.cpp
index 887b022..eef4496 100644
--- a/fpdfsdk/pwl/cpwl_combo_box.cpp
+++ b/fpdfsdk/pwl/cpwl_combo_box.cpp
@@ -27,8 +27,9 @@
 
 }  // namespace
 
-CPWL_CBListBox::CPWL_CBListBox(std::unique_ptr<PrivateData> pAttachedData)
-    : CPWL_ListBox(std::move(pAttachedData)) {}
+CPWL_CBListBox::CPWL_CBListBox(const CreateParams& cp,
+                               std::unique_ptr<PrivateData> pAttachedData)
+    : CPWL_ListBox(cp, std::move(pAttachedData)) {}
 
 CPWL_CBListBox::~CPWL_CBListBox() = default;
 
@@ -100,8 +101,9 @@
   return OnNotifySelectionChanged(true, nFlag);
 }
 
-CPWL_CBButton::CPWL_CBButton(std::unique_ptr<PrivateData> pAttachedData)
-    : CPWL_Wnd(std::move(pAttachedData)) {}
+CPWL_CBButton::CPWL_CBButton(const CreateParams& cp,
+                             std::unique_ptr<PrivateData> pAttachedData)
+    : CPWL_Wnd(cp, std::move(pAttachedData)) {}
 
 CPWL_CBButton::~CPWL_CBButton() = default;
 
@@ -156,8 +158,9 @@
   return true;
 }
 
-CPWL_ComboBox::CPWL_ComboBox(std::unique_ptr<PrivateData> pAttachedData)
-    : CPWL_Wnd(std::move(pAttachedData)) {}
+CPWL_ComboBox::CPWL_ComboBox(const CreateParams& cp,
+                             std::unique_ptr<PrivateData> pAttachedData)
+    : CPWL_Wnd(cp, std::move(pAttachedData)) {}
 
 CPWL_ComboBox::~CPWL_ComboBox() = default;
 
@@ -286,11 +289,11 @@
   ecp.dwBorderWidth = 0;
   ecp.nBorderStyle = BorderStyle::SOLID;
 
-  auto pEdit = pdfium::MakeUnique<CPWL_Edit>(CloneAttachedData());
+  auto pEdit = pdfium::MakeUnique<CPWL_Edit>(ecp, CloneAttachedData());
   m_pEdit = pEdit.get();
   m_pEdit->AttachFFLData(m_pFormFiller.Get());
   AddChild(std::move(pEdit));
-  m_pEdit->Realize(ecp);
+  m_pEdit->Realize();
 }
 
 void CPWL_ComboBox::CreateButton(const CreateParams& cp) {
@@ -306,10 +309,10 @@
   bcp.nBorderStyle = BorderStyle::BEVELED;
   bcp.eCursorType = FXCT_ARROW;
 
-  auto pButton = pdfium::MakeUnique<CPWL_CBButton>(CloneAttachedData());
+  auto pButton = pdfium::MakeUnique<CPWL_CBButton>(bcp, CloneAttachedData());
   m_pButton = pButton.get();
   AddChild(std::move(pButton));
-  m_pButton->Realize(bcp);
+  m_pButton->Realize();
 }
 
 void CPWL_ComboBox::CreateListBox(const CreateParams& cp) {
@@ -333,11 +336,11 @@
   if (cp.sBackgroundColor.nColorType == CFX_Color::kTransparent)
     lcp.sBackgroundColor = PWL_DEFAULT_WHITECOLOR;
 
-  auto pList = pdfium::MakeUnique<CPWL_CBListBox>(CloneAttachedData());
+  auto pList = pdfium::MakeUnique<CPWL_CBListBox>(lcp, CloneAttachedData());
   m_pList = pList.get();
   m_pList->AttachFFLData(m_pFormFiller.Get());
   AddChild(std::move(pList));
-  m_pList->Realize(lcp);
+  m_pList->Realize();
 }
 
 bool CPWL_ComboBox::RePosChildWnd() {
diff --git a/fpdfsdk/pwl/cpwl_combo_box.h b/fpdfsdk/pwl/cpwl_combo_box.h
index e3a3ff3..ee6ed90 100644
--- a/fpdfsdk/pwl/cpwl_combo_box.h
+++ b/fpdfsdk/pwl/cpwl_combo_box.h
@@ -16,7 +16,8 @@
 
 class CPWL_CBListBox final : public CPWL_ListBox {
  public:
-  explicit CPWL_CBListBox(std::unique_ptr<PrivateData> pAttachedData);
+  CPWL_CBListBox(const CreateParams& cp,
+                 std::unique_ptr<PrivateData> pAttachedData);
   ~CPWL_CBListBox() override;
 
   // CPWL_ListBox
@@ -30,7 +31,8 @@
 
 class CPWL_CBButton final : public CPWL_Wnd {
  public:
-  explicit CPWL_CBButton(std::unique_ptr<PrivateData> pAttachedData);
+  CPWL_CBButton(const CreateParams& cp,
+                std::unique_ptr<PrivateData> pAttachedData);
   ~CPWL_CBButton() override;
 
   // CPWL_Wnd
@@ -42,7 +44,8 @@
 
 class CPWL_ComboBox final : public CPWL_Wnd {
  public:
-  explicit CPWL_ComboBox(std::unique_ptr<PrivateData> pAttachedData);
+  CPWL_ComboBox(const CreateParams& cp,
+                std::unique_ptr<PrivateData> pAttachedData);
   ~CPWL_ComboBox() override;
 
   CPWL_Edit* GetEdit() const { return m_pEdit.Get(); }
diff --git a/fpdfsdk/pwl/cpwl_edit.cpp b/fpdfsdk/pwl/cpwl_edit.cpp
index d0922cd..abaac94 100644
--- a/fpdfsdk/pwl/cpwl_edit.cpp
+++ b/fpdfsdk/pwl/cpwl_edit.cpp
@@ -27,8 +27,9 @@
 #include "fpdfsdk/pwl/cpwl_wnd.h"
 #include "public/fpdf_fwlevent.h"
 
-CPWL_Edit::CPWL_Edit(std::unique_ptr<PrivateData> pAttachedData)
-    : CPWL_EditCtrl(std::move(pAttachedData)) {}
+CPWL_Edit::CPWL_Edit(const CreateParams& cp,
+                     std::unique_ptr<PrivateData> pAttachedData)
+    : CPWL_EditCtrl(cp, std::move(pAttachedData)) {}
 
 CPWL_Edit::~CPWL_Edit() {
   ASSERT(!m_bFocus);
diff --git a/fpdfsdk/pwl/cpwl_edit.h b/fpdfsdk/pwl/cpwl_edit.h
index c996437..419a240 100644
--- a/fpdfsdk/pwl/cpwl_edit.h
+++ b/fpdfsdk/pwl/cpwl_edit.h
@@ -43,7 +43,7 @@
 
 class CPWL_Edit final : public CPWL_EditCtrl {
  public:
-  explicit CPWL_Edit(std::unique_ptr<PrivateData> pAttachedData);
+  CPWL_Edit(const CreateParams& cp, std::unique_ptr<PrivateData> pAttachedData);
   ~CPWL_Edit() override;
 
   // CPWL_EditCtrl
diff --git a/fpdfsdk/pwl/cpwl_edit_ctrl.cpp b/fpdfsdk/pwl/cpwl_edit_ctrl.cpp
index 44918be..1b398a6 100644
--- a/fpdfsdk/pwl/cpwl_edit_ctrl.cpp
+++ b/fpdfsdk/pwl/cpwl_edit_ctrl.cpp
@@ -18,8 +18,9 @@
 #include "public/fpdf_fwlevent.h"
 #include "third_party/base/ptr_util.h"
 
-CPWL_EditCtrl::CPWL_EditCtrl(std::unique_ptr<PrivateData> pAttachedData)
-    : CPWL_Wnd(std::move(pAttachedData)),
+CPWL_EditCtrl::CPWL_EditCtrl(const CreateParams& cp,
+                             std::unique_ptr<PrivateData> pAttachedData)
+    : CPWL_Wnd(cp, std::move(pAttachedData)),
       m_pEdit(pdfium::MakeUnique<CPWL_EditImpl>()) {}
 
 CPWL_EditCtrl::~CPWL_EditCtrl() = default;
@@ -94,11 +95,11 @@
   ecp.nBorderStyle = BorderStyle::SOLID;
   ecp.rcRectWnd = CFX_FloatRect();
 
-  auto pCaret = pdfium::MakeUnique<CPWL_Caret>(CloneAttachedData());
+  auto pCaret = pdfium::MakeUnique<CPWL_Caret>(ecp, CloneAttachedData());
   m_pEditCaret = pCaret.get();
   m_pEditCaret->SetInvalidRect(GetClientRect());
   AddChild(std::move(pCaret));
-  m_pEditCaret->Realize(ecp);
+  m_pEditCaret->Realize();
 }
 
 void CPWL_EditCtrl::SetFontSize(float fFontSize) {
diff --git a/fpdfsdk/pwl/cpwl_edit_ctrl.h b/fpdfsdk/pwl/cpwl_edit_ctrl.h
index eb8ccb8..cb89943 100644
--- a/fpdfsdk/pwl/cpwl_edit_ctrl.h
+++ b/fpdfsdk/pwl/cpwl_edit_ctrl.h
@@ -23,7 +23,8 @@
 
 class CPWL_EditCtrl : public CPWL_Wnd {
  public:
-  explicit CPWL_EditCtrl(std::unique_ptr<PrivateData> pAttachedData);
+  CPWL_EditCtrl(const CreateParams& cp,
+                std::unique_ptr<PrivateData> pAttachedData);
   ~CPWL_EditCtrl() override;
 
   void SetSelection(int32_t nStartChar, int32_t nEndChar);
diff --git a/fpdfsdk/pwl/cpwl_icon.cpp b/fpdfsdk/pwl/cpwl_icon.cpp
index 8d672f5..946c76f 100644
--- a/fpdfsdk/pwl/cpwl_icon.cpp
+++ b/fpdfsdk/pwl/cpwl_icon.cpp
@@ -15,8 +15,9 @@
 #include "core/fpdfapi/parser/cpdf_stream.h"
 #include "fpdfsdk/pwl/cpwl_wnd.h"
 
-CPWL_Icon::CPWL_Icon(std::unique_ptr<PrivateData> pAttachedData)
-    : CPWL_Wnd(std::move(pAttachedData)) {}
+CPWL_Icon::CPWL_Icon(const CreateParams& cp,
+                     std::unique_ptr<PrivateData> pAttachedData)
+    : CPWL_Wnd(cp, std::move(pAttachedData)) {}
 
 CPWL_Icon::~CPWL_Icon() = default;
 
diff --git a/fpdfsdk/pwl/cpwl_icon.h b/fpdfsdk/pwl/cpwl_icon.h
index 83709f7..b36c697 100644
--- a/fpdfsdk/pwl/cpwl_icon.h
+++ b/fpdfsdk/pwl/cpwl_icon.h
@@ -16,7 +16,7 @@
 
 class CPWL_Icon final : public CPWL_Wnd {
  public:
-  explicit CPWL_Icon(std::unique_ptr<PrivateData> pAttachedData);
+  CPWL_Icon(const CreateParams& cp, std::unique_ptr<PrivateData> pAttachedData);
   ~CPWL_Icon() override;
 
   void SetIconFit(CPDF_IconFit* pIconFit) { m_pIconFit = pIconFit; }
diff --git a/fpdfsdk/pwl/cpwl_list_box.cpp b/fpdfsdk/pwl/cpwl_list_box.cpp
index 4cea17b..003fe11 100644
--- a/fpdfsdk/pwl/cpwl_list_box.cpp
+++ b/fpdfsdk/pwl/cpwl_list_box.cpp
@@ -65,8 +65,9 @@
   m_pList->InvalidateRect(pRect);
 }
 
-CPWL_ListBox::CPWL_ListBox(std::unique_ptr<PrivateData> pAttachedData)
-    : CPWL_Wnd(std::move(pAttachedData)),
+CPWL_ListBox::CPWL_ListBox(const CreateParams& cp,
+                           std::unique_ptr<PrivateData> pAttachedData)
+    : CPWL_Wnd(cp, std::move(pAttachedData)),
       m_pList(pdfium::MakeUnique<CPWL_ListCtrl>()) {}
 
 CPWL_ListBox::~CPWL_ListBox() = default;
diff --git a/fpdfsdk/pwl/cpwl_list_box.h b/fpdfsdk/pwl/cpwl_list_box.h
index cbfca45..2b4d693 100644
--- a/fpdfsdk/pwl/cpwl_list_box.h
+++ b/fpdfsdk/pwl/cpwl_list_box.h
@@ -38,7 +38,8 @@
 
 class CPWL_ListBox : public CPWL_Wnd {
  public:
-  explicit CPWL_ListBox(std::unique_ptr<PrivateData> pAttachedData);
+  CPWL_ListBox(const CreateParams& cp,
+               std::unique_ptr<PrivateData> pAttachedData);
   ~CPWL_ListBox() override;
 
   // CPWL_Wnd
diff --git a/fpdfsdk/pwl/cpwl_scroll_bar.cpp b/fpdfsdk/pwl/cpwl_scroll_bar.cpp
index fb2060a..0209ba0 100644
--- a/fpdfsdk/pwl/cpwl_scroll_bar.cpp
+++ b/fpdfsdk/pwl/cpwl_scroll_bar.cpp
@@ -105,10 +105,11 @@
     SetPos(ScrollRange.fMin);
 }
 
-CPWL_SBButton::CPWL_SBButton(std::unique_ptr<PrivateData> pAttachedData,
+CPWL_SBButton::CPWL_SBButton(const CreateParams& cp,
+                             std::unique_ptr<PrivateData> pAttachedData,
                              PWL_SCROLLBAR_TYPE eScrollBarType,
                              PWL_SBBUTTON_TYPE eButtonType)
-    : CPWL_Wnd(std::move(pAttachedData)),
+    : CPWL_Wnd(cp, std::move(pAttachedData)),
       m_eScrollBarType(eScrollBarType),
       m_eSBButtonType(eButtonType) {}
 
@@ -298,9 +299,10 @@
   return true;
 }
 
-CPWL_ScrollBar::CPWL_ScrollBar(std::unique_ptr<PrivateData> pAttachedData,
+CPWL_ScrollBar::CPWL_ScrollBar(const CreateParams& cp,
+                               std::unique_ptr<PrivateData> pAttachedData,
                                PWL_SCROLLBAR_TYPE sbType)
-    : CPWL_Wnd(std::move(pAttachedData)), m_sbType(sbType) {}
+    : CPWL_Wnd(cp, std::move(pAttachedData)), m_sbType(sbType) {}
 
 CPWL_ScrollBar::~CPWL_ScrollBar() = default;
 
@@ -541,29 +543,29 @@
       PWS_VISIBLE | PWS_CHILD | PWS_BORDER | PWS_BACKGROUND | PWS_NOREFRESHCLIP;
 
   if (!m_pMinButton) {
-    auto pButton = pdfium::MakeUnique<CPWL_SBButton>(CloneAttachedData(),
+    auto pButton = pdfium::MakeUnique<CPWL_SBButton>(scp, CloneAttachedData(),
                                                      m_sbType, PSBT_MIN);
     m_pMinButton = pButton.get();
     AddChild(std::move(pButton));
-    m_pMinButton->Realize(scp);
+    m_pMinButton->Realize();
   }
 
   if (!m_pMaxButton) {
-    auto pButton = pdfium::MakeUnique<CPWL_SBButton>(CloneAttachedData(),
+    auto pButton = pdfium::MakeUnique<CPWL_SBButton>(scp, CloneAttachedData(),
                                                      m_sbType, PSBT_MAX);
     m_pMaxButton = pButton.get();
     AddChild(std::move(pButton));
-    m_pMaxButton->Realize(scp);
+    m_pMaxButton->Realize();
   }
 
   if (!m_pPosButton) {
-    auto pButton = pdfium::MakeUnique<CPWL_SBButton>(CloneAttachedData(),
+    auto pButton = pdfium::MakeUnique<CPWL_SBButton>(scp, CloneAttachedData(),
                                                      m_sbType, PSBT_POS);
     m_pPosButton = pButton.get();
     ObservedPtr thisObserved(this);
     if (m_pPosButton->SetVisible(false) && thisObserved) {
       AddChild(std::move(pButton));
-      m_pPosButton->Realize(scp);
+      m_pPosButton->Realize();
     }
   }
 }
diff --git a/fpdfsdk/pwl/cpwl_scroll_bar.h b/fpdfsdk/pwl/cpwl_scroll_bar.h
index 40660db..82c995b 100644
--- a/fpdfsdk/pwl/cpwl_scroll_bar.h
+++ b/fpdfsdk/pwl/cpwl_scroll_bar.h
@@ -12,9 +12,6 @@
 #include "core/fxcrt/unowned_ptr.h"
 #include "fpdfsdk/pwl/cpwl_wnd.h"
 
-class CPWL_SBButton;
-class CPWL_ScrollBar;
-
 struct PWL_SCROLL_INFO {
  public:
   PWL_SCROLL_INFO()
@@ -46,7 +43,8 @@
 
 class CPWL_SBButton final : public CPWL_Wnd {
  public:
-  CPWL_SBButton(std::unique_ptr<PrivateData> pAttachedData,
+  CPWL_SBButton(const CreateParams& cp,
+                std::unique_ptr<PrivateData> pAttachedData,
                 PWL_SCROLLBAR_TYPE eScrollBarType,
                 PWL_SBBUTTON_TYPE eButtonType);
   ~CPWL_SBButton() override;
@@ -117,7 +115,8 @@
 
 class CPWL_ScrollBar final : public CPWL_Wnd {
  public:
-  CPWL_ScrollBar(std::unique_ptr<PrivateData> pAttachedData,
+  CPWL_ScrollBar(const CreateParams& cp,
+                 std::unique_ptr<PrivateData> pAttachedData,
                  PWL_SCROLLBAR_TYPE sbType);
   ~CPWL_ScrollBar() override;
 
diff --git a/fpdfsdk/pwl/cpwl_special_button.cpp b/fpdfsdk/pwl/cpwl_special_button.cpp
index 8e5f1b8..16f8c89 100644
--- a/fpdfsdk/pwl/cpwl_special_button.cpp
+++ b/fpdfsdk/pwl/cpwl_special_button.cpp
@@ -11,8 +11,9 @@
 #include "fpdfsdk/pwl/cpwl_button.h"
 #include "fpdfsdk/pwl/cpwl_wnd.h"
 
-CPWL_PushButton::CPWL_PushButton(std::unique_ptr<PrivateData> pAttachedData)
-    : CPWL_Button(std::move(pAttachedData)) {}
+CPWL_PushButton::CPWL_PushButton(const CreateParams& cp,
+                                 std::unique_ptr<PrivateData> pAttachedData)
+    : CPWL_Button(cp, std::move(pAttachedData)) {}
 
 CPWL_PushButton::~CPWL_PushButton() = default;
 
@@ -21,8 +22,9 @@
                                      static_cast<float>(GetBorderWidth()));
 }
 
-CPWL_CheckBox::CPWL_CheckBox(std::unique_ptr<PrivateData> pAttachedData)
-    : CPWL_Button(std::move(pAttachedData)) {}
+CPWL_CheckBox::CPWL_CheckBox(const CreateParams& cp,
+                             std::unique_ptr<PrivateData> pAttachedData)
+    : CPWL_Button(cp, std::move(pAttachedData)) {}
 
 CPWL_CheckBox::~CPWL_CheckBox() = default;
 
@@ -39,8 +41,9 @@
   return true;
 }
 
-CPWL_RadioButton::CPWL_RadioButton(std::unique_ptr<PrivateData> pAttachedData)
-    : CPWL_Button(std::move(pAttachedData)) {}
+CPWL_RadioButton::CPWL_RadioButton(const CreateParams& cp,
+                                   std::unique_ptr<PrivateData> pAttachedData)
+    : CPWL_Button(cp, std::move(pAttachedData)) {}
 
 CPWL_RadioButton::~CPWL_RadioButton() = default;
 
diff --git a/fpdfsdk/pwl/cpwl_special_button.h b/fpdfsdk/pwl/cpwl_special_button.h
index 28c2a6b..68bb965 100644
--- a/fpdfsdk/pwl/cpwl_special_button.h
+++ b/fpdfsdk/pwl/cpwl_special_button.h
@@ -13,7 +13,8 @@
 
 class CPWL_PushButton final : public CPWL_Button {
  public:
-  explicit CPWL_PushButton(std::unique_ptr<PrivateData> pAttachedData);
+  CPWL_PushButton(const CreateParams& cp,
+                  std::unique_ptr<PrivateData> pAttachedData);
   ~CPWL_PushButton() override;
 
   // CPWL_Button:
@@ -22,7 +23,8 @@
 
 class CPWL_CheckBox final : public CPWL_Button {
  public:
-  explicit CPWL_CheckBox(std::unique_ptr<PrivateData> pAttachedData);
+  CPWL_CheckBox(const CreateParams& cp,
+                std::unique_ptr<PrivateData> pAttachedData);
   ~CPWL_CheckBox() override;
 
   // CPWL_Button:
@@ -38,7 +40,8 @@
 
 class CPWL_RadioButton final : public CPWL_Button {
  public:
-  explicit CPWL_RadioButton(std::unique_ptr<PrivateData> pAttachedData);
+  CPWL_RadioButton(const CreateParams& cp,
+                   std::unique_ptr<PrivateData> pAttachedData);
   ~CPWL_RadioButton() override;
 
   // CPWL_Button
diff --git a/fpdfsdk/pwl/cpwl_wnd.cpp b/fpdfsdk/pwl/cpwl_wnd.cpp
index 8ed57de..90aa15c 100644
--- a/fpdfsdk/pwl/cpwl_wnd.cpp
+++ b/fpdfsdk/pwl/cpwl_wnd.cpp
@@ -111,17 +111,17 @@
   UnownedPtr<CPWL_Wnd> m_pMainKeyboardWnd;
 };
 
-CPWL_Wnd::CPWL_Wnd(std::unique_ptr<PrivateData> pAttachedData)
-    : m_pAttachedData(std::move(pAttachedData)) {}
+CPWL_Wnd::CPWL_Wnd(const CreateParams& cp,
+                   std::unique_ptr<PrivateData> pAttachedData)
+    : m_CreationParams(cp), m_pAttachedData(std::move(pAttachedData)) {}
 
 CPWL_Wnd::~CPWL_Wnd() {
   ASSERT(!m_bCreated);
 }
 
-void CPWL_Wnd::Realize(const CreateParams& cp) {
+void CPWL_Wnd::Realize() {
   ASSERT(!m_bCreated);
 
-  m_CreationParams = cp;
   OnCreate(&m_CreationParams);
   m_CreationParams.rcRectWnd.Normalize();
   m_rcWindow = m_CreationParams.rcRectWnd;
@@ -484,20 +484,17 @@
     return;
 
   CreateParams scp = cp;
-
-  // flags
   scp.dwFlags =
       PWS_CHILD | PWS_BACKGROUND | PWS_AUTOTRANSPARENT | PWS_NOREFRESHCLIP;
-
   scp.sBackgroundColor = PWL_DEFAULT_WHITECOLOR;
   scp.eCursorType = FXCT_ARROW;
   scp.nTransparency = PWL_SCROLLBAR_TRANSPARENCY;
 
   auto pBar =
-      pdfium::MakeUnique<CPWL_ScrollBar>(CloneAttachedData(), SBT_VSCROLL);
+      pdfium::MakeUnique<CPWL_ScrollBar>(scp, CloneAttachedData(), SBT_VSCROLL);
   m_pVScrollBar = pBar.get();
   AddChild(std::move(pBar));
-  m_pVScrollBar->Realize(scp);
+  m_pVScrollBar->Realize();
 }
 
 void CPWL_Wnd::SetCapture() {
diff --git a/fpdfsdk/pwl/cpwl_wnd.h b/fpdfsdk/pwl/cpwl_wnd.h
index 51e34a7..64fe131 100644
--- a/fpdfsdk/pwl/cpwl_wnd.h
+++ b/fpdfsdk/pwl/cpwl_wnd.h
@@ -132,7 +132,7 @@
     CFX_Matrix mtChild;                               // ignore
   };
 
-  explicit CPWL_Wnd(std::unique_ptr<PrivateData> pAttachedData);
+  CPWL_Wnd(const CreateParams& cp, std::unique_ptr<PrivateData> pAttachedData);
   ~CPWL_Wnd() override;
 
   // Returns |true| iff this instance is still allocated.
@@ -178,7 +178,7 @@
 
   void AddChild(std::unique_ptr<CPWL_Wnd> pWnd);
   void RemoveChild(CPWL_Wnd* pWnd);
-  void Realize(const CreateParams& cp);
+  void Realize();
   void Destroy();
   bool Move(const CFX_FloatRect& rcNew, bool bReset, bool bRefresh);