Remove FX_DWORD from core/ and delete definition

core/fxcrt/fxcrt_windows.h

Index: core/fxcrt/fxcrt_windows.h
diff --git a/core/fxcrt/fxcrt_windows.h b/core/fxcrt/fxcrt_windows.h
index 04a1a55b1658db4c9521eb794e056ae2cab347d8..7444446d454a1aacdae53eee83fd6aa5cd1b1c6e 100644
--- a/core/fxcrt/fxcrt_windows.h
+++ b/core/fxcrt/fxcrt_windows.h
@@ -16,8 +16,8 @@ class CFXCRT_FileAccess_Win64 : public IFXCRT_FileAccess {
   ~CFXCRT_FileAccess_Win64() override;
 
   // IFXCRT_FileAccess
-  FX_BOOL Open(const CFX_ByteStringC& fileName, FX_DWORD dwMode) override;
-  FX_BOOL Open(const CFX_WideStringC& fileName, FX_DWORD dwMode) override;
+  FX_BOOL Open(const CFX_ByteStringC& fileName, uint32_t dwMode) override;
+  FX_BOOL Open(const CFX_WideStringC& fileName, uint32_t dwMode) override;
   void Close() override;
   void Release() override;
   FX_FILESIZE GetSize() const override;