SPCOMM程序里面，我有一段没有读懂，是关于流控制的，程序如下：

dcb.Flags := 1; // Enable fBinary

if FParityCheck then
dcb.Flags := dcb.Flags or 2; // Enable parity check

// setup hardware flow control

if FOutx_CtsFlow then
dcb.Flags := dcb.Flags or 4;

if FOutx_DsrFlow then
dcb.Flags := dcb.Flags or 8;

if FDtrControl = DtrEnable then
dcb.Flags := dcb.Flags or $10
else if FDtrControl = DtrHandshake then
dcb.Flags := dcb.Flags or $20;

if FDsrSensitivity then
dcb.Flags := dcb.Flags or $40;

if FTxContinueOnXoff then
dcb.Flags := dcb.Flags or $80;

if FOutx_XonXoffFlow then
dcb.Flags := dcb.Flags or $100;

if FInx_XonXoffFlow then
dcb.Flags := dcb.Flags or $200;

if FReplaceWhenParityError then
dcb.Flags := dcb.Flags or $400;

if FIgnoreNullChar then
dcb.Flags := dcb.Flags or $800;

if FRtsControl = RtsEnable then
dcb.Flags := dcb.Flags or $1000
else if FRtsControl = RtsHandshake then
dcb.Flags := dcb.Flags or $2000
else if FRtsControl = RtsTransmissionAvailable then
dcb.Flags := dcb.Flags or $3000;
我找了很多帮助资料，但是都没说DCB结构里面有flags成员。不理解将flags与那些数或是怎么达到流控制的。
请高手一定要帮助下下啊，，，！！！

[此贴子已经被作者于2007-5-20 11:38:08编辑过]