c++builder中枚举型数据的应用问题

[我是必胜客]

我在头文件中声明了一个PictureType的枚举型数据：

#include <ToolWin.hpp>
#include <jpeg.hpp>
#include <pngimage.hpp>
#include <gifimage.hpp>

//---------------------------------------------------------------------------
enum PictureType { Bitmap, PNG, JPEG, ICO, GIF };
//---------------------------------------------------------------------------
class TForm1 : public TForm
{

并且在TForm1窗口类的公有权限下定义了一个枚举型的变量：pctType。如下：

public:		// User declarations
        Graphics::TBitmap * bmpPicture;
        TJPEGImage        * jpgPicture;
        TPNGObject        * pngPicture;
        TGIFImage         * gifPicture;
        Graphics::TIcon   * icoPicture;

        PictureType pctType;
        __fastcall TForm1(TComponent* Owner);
};

但是在.hpp文件用使用时，使用情况如下：
1.

if( ExtensionName == ".bmp" )
    {
    frmChild -> pctType = PictureType::Bitmap;
    //Get the picture from the file
    frmChild -> bmpPicture -> LoadFromFile(OpenPictureDialog1 -> FileName);
    //Resize the child form to the size of picture
    frmChild -> ClientWidth = frmChild -> bmpPicture -> Width;
    frmChild -> ClientHeight = frmChild -> bmpPicture -> Height;
    }

2.

switch( pctType )
  {
  case PictureType::Bitmap:
       Canvas -> Draw( 0, 0, bmpPicture );
       break;
  case PictureType::JPEG:
       Canvas -> Draw( 0, 0, jpgPicture );
       break;
  case PictureType::PNG:
       Canvas -> Draw( 0, 0, pngPicture );
       break;
  case PictureType::GIF:
       Canvas -> Draw( 0, 0, gifPicture );
       break;
  case PictureType::ICO:
       Canvas -> Draw( 0, 0, icoPicture );
       break;
  }

会出现如下的报错提示：
[C++ Error] Unit1.cpp(54): E2090 Qualifier 'PictureType' is not a class or namespace name
[C++ Error] Unit1.cpp(54): E2379 Statement missing ;
[C++ Error] Unit1.cpp(63): E2090 Qualifier 'PictureType' is not a class or namespace name
[C++ Error] Unit1.cpp(63): E2379 Statement missing ;
[C++ Error] Unit1.cpp(70): E2090 Qualifier 'PictureType' is not a class or namespace name
[C++ Error] Unit1.cpp(70): E2379 Statement missing ;
[C++ Error] Unit1.cpp(77): E2090 Qualifier 'PictureType' is not a class or namespace name
[C++ Error] Unit1.cpp(77): E2379 Statement missing ;
[C++ Error] Unit1.cpp(84): E2090 Qualifier 'PictureType' is not a class or namespace name
[C++ Error] Unit1.cpp(84): E2379 Statement missing ;
[C++ Error] Unit1.cpp(251): E2090 Qualifier 'PictureType' is not a class or namespace name
[C++ Error] Unit1.cpp(251): E2127 Case statement missing :
[C++ Error] Unit1.cpp(252): E2090 Qualifier 'PictureType' is not a class or namespace name
[C++ Error] Unit1.cpp(252): E2127 Case statement missing :
[C++ Error] Unit1.cpp(253): E2090 Qualifier 'PictureType' is not a class or namespace name
[C++ Error] Unit1.cpp(253): E2127 Case statement missing :
[C++ Error] Unit1.cpp(254): E2090 Qualifier 'PictureType' is not a class or namespace name
[C++ Error] Unit1.cpp(254): E2127 Case statement missing :
[C++ Error] Unit1.cpp(255): E2090 Qualifier 'PictureType' is not a class or namespace name
[C++ Error] Unit1.cpp(255): E2127 Case statement missing :

[ccrun.com]

PictureType::Bitmap;

换成

Bitmap;

即可。其他的同理。

[我是必胜客]

嗯，谢谢了。