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char ch_OutBuffer[]={0xff , ' ', 0x01 , ' ', 0x00 , ' ', 0x04, ' ',
0xff, ' ', 0x00, ' ', 0x04};
DWORD w_BytesWrite = 8;
WriteFile(hCom, ch_OutBuffer, w_BytesWrite, &w_BytesWrite, NULL);
char ch_OutBuffer[]={'f ', 'f' , ' ', '0' , '1' ,' ' , '0', '0', ' ', '0', '4', ' '
, 'f', 'f', ' ', '0', '0', ' ', '0', '4'};