VB调用VC写的dll总是出现内存不能写的错误.为什么?

这是vc写的dll的头文件    
  #ifdef   MEMCARD_EXPORTS  
  #define   MEMCARD_API   __declspec(dllexport)  
  #else  
  #define   MEMCARD_API   __declspec(dllimport)  
  #endif  
   
  extern   "C"   MEMCARD_API     void   __stdcall   MemCardGetDecryptedData(unsigned   char*   buffer,bool   PCVer);  
  extern   "C"   MEMCARD_API     void   __stdcall   MemCardGetEncryptedData(unsigned   char*   buffer,bool   PCVer);  
   
   
  我的vb程序是  
  Dim   Buffer(1250303)   As   Byte  
  Private   Declare   Function   MemCardGetDecryptedData   Lib   "MemCard.dll"   Alias   "_MemCardGetDecryptedData@8"   (ByRef   Buffer()   As   Byte,   ByVal   PC   As   Boolean)  
       
   
  Private   Sub   Command1_Click()  
  dlg1.Filter   =   "(*.*)|*.*"  
  dlg1.ShowOpen  
  If   dlg1.FileName   <>   ""   Then  
        Open   dlg1.FileName   For   Binary   As   #1  
              Get   #1,   ,   Buffer()  
        Close   #1  
  End   If  
  End   Sub  
   
  Private   Sub   Command2_Click()  
  Call   MemCardGetDecryptedData(Buffer(),   True)  
  End   Sub  
   
  可是不知道怎么就是不行 问题点数：10、回复次数：1Top

1 楼rainstormmaster（暴风雨 v2.0）回复于 2006-03-04 19:19:48 得分 10

试试这样：  
  Private   Declare   Function   MemCardGetDecryptedData   Lib   "MemCard.dll"   Alias   "_MemCardGetDecryptedData@8"   (ByRef   Buffer   As   Byte,   ByVal   PC   As   Boolean)  
   
  Private   Sub   Command2_Click()  
  Call   MemCardGetDecryptedData(Buffer(0),   True)  
  End   SubTop

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