vb編寫的dll：註冊dll，引用dll，private xxx as dll中的類名，在form_load中初始化：set xxx = new dll中的類名或：註冊dll，set xxx = createobject("工程名.類名")vc 編些的標準dll：private|public declare function|sub 函式名 lib "dll名" [Alias "dll中的函式名"](引數) as 返回值型別例：Declare Function BitBlt Lib "gdi32" Alias "BitBlt" (ByVal hDestDC As Long, ByVal x As Long, ByVal y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hSrcDC As Long, ByVal xSrc As Long, ByVal ySrc As Long, ByVal dwRop As Long) As Long