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http://www.soasp.net/FilePage/200803/20080313214455.aspx


C# code:


public class BLCommPort
{

[DllImport("kernel32.dll")]
private static extern bool GetCommState(
int hFile, //ͨÐÅÉ豸¾ä±ú
ref DCB lpDCB // É豸¿ØÖÆ¿éDCB
);
[DllImport("kernel32.dll")]
private static extern bool BuildCommDCB(
string lpDef, // É豸¿ØÖÆ×Ö·û´®
ref DCB lpDCB // É豸¿ØÖÆ¿é
);
[DllImport("kernel32.dll")]
private static extern bool SetCommState(
int hFile, // ͨÐÅÉ豸¾ä±ú
ref DCB lpDCB // É豸¿ØÖÆ¿é
);
[DllImport("kernel32.dll")]
private static extern bool GetCommTimeouts(
int hFile, // ͨÐÅÉ豸¾ä±ú handle to comm device
ref COMMTIMEOUTS lpCommTimeouts // ³¬Ê±Ê±¼ä time-out values
);
[DllImport("kernel32.dll")]
private static extern bool SetCommTimeouts(
int hFile, // ͨÐÅÉ豸¾ä±ú handle to comm device
ref COMMTIMEOUTS lpCommTimeouts // ³¬Ê±Ê±¼ä time-out values


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