關于DLL編譯出錯的問題﹗

[tang664]

在DLL的類模塊里面﹐如果過程或函數的參數類型為控件﹐如﹕comboBox等VB自帶的控件時﹐編譯DLL時出錯.

如編譯如下過程﹕
Public Sub AddGrid(iCom As ComboBox)
iCom.AddItem "test"
End Sub

出錯出下﹕
Compile Error:
Private object modules connot be used in public object modules as parameters or return types for public procedures,as public data members,or as fields or public user defined types
這是什么原因﹖如何解決﹖