Delphi Prism getting Unknown Identifier "DllImport" error -

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i'm trying call window's sendmessage method in delphi prism, i've declared class follow:

type   myutils = public static class   private     [dllimport("user32.dll", charset := charset.auto)]     method sendmessage(hwnd:intptr; msg:uint32; wparam:intptr; lparam:intptr):intptr; external;   protected   public   end;

when tried compile, error unknown identifier "dllimport"

i used example, how call function createprocess in delphi prism? , syntax looks same. there setting need enable, or have syntax error?

make sure import (use) system.runtime.interopservices. that's dllimport attribute defined.


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