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[DllImport("STATEAPI.dll")]
public static extern int Open(StateCallBack fnState);
// 回调声明
public delegate void StateCallBack(int state);
//具体使用 点击事件:
{
API.StateCallBack stateCallBackCsharp = new API.StateCallBack(StateCallback);
API.Open(stateCallBackCsharp);
}
callback定义:
public void StateCallback(int state)
{
this.label.Text = "dffafd"
}