BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  How do I use MSComm32.ocx?          BorlandTalk.com Forum Index -> C++ Builder (ActiveX) View previous topic :: View next topic   Author Message Daniel.Z Guest Posted: Wed Jun 01, 2005 4:41 pm    Post subject: How do I use MSComm32.ocx? Hi, I am trying to use microsoft ActiveX Mscomm32.ocx to finish RS232 communication. I have a little problem by using OleVariant. Here is my code, OleVariant RxBuff; char m_sInput[200]; RxBuff = MSComm->Input; int num = RxBuff->ArrayHighBound(1); // invalid argument for(int i=0; i < num; i++) m_sInput[i] = RxBuff.GetElement(i); // invalid argument it always tells me "invalid argument" at running time. Can anyone help me out? Thanks Back to top Daniel.Z Guest Posted: Wed Jun 01, 2005 5:54 pm    Post subject: Re: How do I use MSComm32.ocx? I should ask how to convert O Daniel.Z wrote: Quote: Hi, I am trying to use microsoft ActiveX Mscomm32.ocx to finish RS232 communication. I have a little problem by using OleVariant. Here is my code, OleVariant RxBuff; char m_sInput[200]; RxBuff = MSComm->Input; int num = RxBuff->ArrayHighBound(1); // invalid argument for(int i=0; i < num; i++) m_sInput[i] = RxBuff.GetElement(i); // invalid argument it always tells me "invalid argument" at running time. Can anyone help me out? Thanks I already received data, because MSComm->InBufferCount > 0. Now I just need to convert RxBuff to AnsiString or BSTR. 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