單項(xiàng)選擇題

下面代碼是申明EPCSDK.dll中的打開和關(guān)閉串口的函數(shù),請(qǐng)指出里面包含()處錯(cuò)誤--[DllImport(“EPCSDK.dll”)]--publicstaticexternIntPtrOpenComm(intportNo);--[DllImport(“EPCSDK.dll”)]--publicstaticexternvoidCloseComm();

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