vb 中:=符号是什么意思？

：=是VB中的可选参数，按名传递。我见过的都是在<属性>中给参数赋值用：=符号，比如这个MSDN中的例子
Visual Basic
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' Declares a class member foreachstructure element.
< StructLayout( LayoutKind.Sequential, CharSet := CharSet.Auto )> _
PublicClass FindData
Public fileAttributes AsInteger = 0
' creationTime was a by-value FILETIME structure.
Public creationTime_lowDateTime AsInteger = 0
Public creationTime_highDateTime AsInteger = 0
' lastAccessTime was a by-value FILETIME structure.
Public lastAccessTime_lowDateTime AsInteger = 0
Public lastAccessTime_highDateTime AsInteger = 0
' lastWriteTime was a by-value FILETIME structure.
Public lastWriteTime_lowDateTime AsInteger = 0
Public lastWriteTime_highDateTime AsInteger = 0
Public nFileSizeHigh AsInteger = 0
Public nFileSizeLow AsInteger = 0
Public dwReserved0 AsInteger = 0
Public dwReserved1 AsInteger = 0
< MarshalAs( UnmanagedType.ByValTStr, SizeConst := 256 )> _
Public fileName AsString = Nothing
< MarshalAs( UnmanagedType.ByValTStr, SizeConst := 14 )> _
Public alternateFileName AsString = NothingEndClass 'FindData

PublicClass LibWrap
' Declares a managed prototype for the unmanaged function.
DeclareAutoFunction FindFirstFile Lib"Kernel32.dll" _
( ByVal fileName AsString, <[In], Out> ByVal findFileData As _
FindData ) As IntPtr
EndClass 'LibWrap

就是赋值。一般只出现在用VB操作WORD等软件的代码中

VB中没有这个符号, 这个是Delphi的. 是赋值的意思

赋值

VBA中的代码了