I am using MSComm control in my vb.net program. After I configure the port, I want send data out, but I get error "Exception from HRESULT:0x800A1F52". Can somebody tell me what I did wrong? thanks.
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I am using MSComm control in my vb.net program. After I configure the port, I want send data out, but I get error "Exception from HRESULT:0x800A1F52". Can somebody tell me what I did wrong? thanks.