Vb.net implements Any variant type in Vb, and vb. netvbany Variant

Source: Internet
Author: User

Vb.net implements Any variant type in Vb, and vb. netvbany Variant

Today, I accidentally discovered that I could replace Any in VB and use <managed Alas (UnmanagedType. AsAny)> In the API declaration.

APIS declared in VB

1 Declare Function SendMessage & Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any)

You can play in vb.net like this.

1 Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Int32, ByVal wMsg As Int32, ByVal wParam As Int32, <financialas (UnmanagedType. asAny)> lParam As Object) As Int32

 

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