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如何解决编译时 file already processed 警告错误?

请教一下,我文件CommandTrade.mqh中包含 #include <LokyTrade\LokyTrade-1.mq4> #include <LokyTrade\LokyTrade-2.mq4> 而LokyTrade\LokyTrade-1.mq4和LokyTrade\LokyTrade-2.mq4中均包含了 #include <LokyTrade\CommonLokyFunction.mq4> 编译CommandTrade.mqh时警告: 'LokyTrade\CommonLokyFunction.mq4' - file already processed

如何在mt4里调用c#编写的dll

如何在mt4里调用c#编写的dll,能否给一个例子,谢谢!