FX_BOOL considered harmful.

fpdfsdk/src/pdfwindow/PWL_Button.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "../../include/pdfwindow/PDFWindow.h"
 #include "../../include/pdfwindow/PWL_Wnd.h"
 #include "../../include/pdfwindow/PWL_Button.h"
 #include "../../include/pdfwindow/PWL_Utils.h"
 
 /* ------------------------------- CPWL_Button ---------------------------------- */
 
 CPWL_Button::CPWL_Button() :
-        m_bMouseDown(FALSE)
+        m_bMouseDown(false)
 {
 }
 
 CPWL_Button::~CPWL_Button()
 {
 //      PWL_TRACE("~CPWL_Button\n");
 }
 
 CFX_ByteString CPWL_Button::GetClassName() const
 {
         return "CPWL_Button";
 }
 
 void CPWL_Button::OnCreate(PWL_CREATEPARAM & cp)
 {
         cp.eCursorType = FXCT_HAND;
 }
 
-FX_BOOL CPWL_Button::OnLButtonDown(const CPDF_Point & point, FX_DWORD nFlag)
+bool CPWL_Button::OnLButtonDown(const CPDF_Point & point, FX_DWORD nFlag)
 {
         CPWL_Wnd::OnLButtonDown(point, nFlag);
 
-        m_bMouseDown = TRUE;
+        m_bMouseDown = true;
         SetCapture();
 
-        return TRUE;
+        return true;
 }
 
-FX_BOOL CPWL_Button::OnLButtonUp(const CPDF_Point & point, FX_DWORD nFlag)
+bool CPWL_Button::OnLButtonUp(const CPDF_Point & point, FX_DWORD nFlag)
 {
         CPWL_Wnd::OnLButtonUp(point, nFlag);
 
         ReleaseCapture();
-        m_bMouseDown = FALSE;
+        m_bMouseDown = false;
 
-        return TRUE;
+        return true;
 }