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vb默認 byref   vc 默認 byval
stdcall方式不能傳遞浮點,變通方法傳遞浮點變量的指針.
byte       unsigned char
integer  short
bool       short
long       int
single    float
double  double


 //vc char *vb byval variable as String
  //vc指針的指針  vb any

LPSTR *      byref  variable as String

  //Private Declare Function wpfnDllTest Lib "dllTest.dll" (w ) As Integer  等價于 byval w as Variant
//Private Declare Function wpfnDllTest Lib "dllTest.dll" (w As Any) As Integer  Any w是什么就傳遞什么,無類型匹配檢查