工作需要，要用VB写一个接口程序，其中要把浮点型转成Byte数组，用到了一个API，先记录下来，以后C#中可能会用到同样的功能。
Private Declare Sub CopyMemory Lib " kernel32 " Alias " RtlMoveMemory " ( ByVal Destination As Long , ByVal Source As Long , ByVal Length As Long )
浮点转换Byte函数
Private Function FloatToBytes(value As Single ) As Byte ()
Dim returnByte( 4 ) As Byte
Dim sPtr As Long ,bPtr As Long
sPtr = VarPtr(value)
bPtr = VarPtr(returnByte( 1 ))
CopyMemorybPtr,sPtr, 4
FloatToBytes = returnByte
EndFunction Byte转换浮点函数 Private Function BytesToFloat(bytes() As Byte ) As Single
Dim returnValue As Single
Dim sPtr As Long ,bPtr As Long
sPtr = VarPtr(returnValue)
bPtr = VarPtr(bytes( 1 ))
CopyMemorysPtr, ByVal bPtr, 4
BytesToFloat = returnValue
EndFunction
