roby Posted October 29, 2007 Share Posted October 29, 2007 Hi, I have a little problem, big for me... I write a dll for serial comunication. The function below, receive the characters from rsr232 and function, but the value don't pass to dllCall().. WHY??? Where do I mistake?? extern "C" __declspec(dllexport) char GetByte() { char rxchar; BOOL bReadRC; static DWORD iBytesRead; bReadRC = ReadFile(hCom, &rxchar, 1, &iBytesRead, NULL); if (bReadRC) { if (rxchar.GetByte(1) != NULL) { return rxchar; } } // return 0 if no character read } This is syntax of dllCall: $byteTmp = DllCall('commg.dll','str:cdecl','GetByte') Is it good? Thank you Regards Roby Link to comment Share on other sites More sharing options...
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