int _LastError
int _LastErrorThe _LastError variable contains code of the last error, that occurred during the mql4-program run. Its value can be reset to zero by ResetLastError().To obtain the code of the last error, you may also use the GetLastError() function. GetLastError() 学习MT4函数int _LastError 学习MT4函数int _LastError 函数在这个里面https://docs.mql4.com/cn/function_indices常量在这里 https://docs.mql4.com/cn/constant_indices
自己去查文档,里面都有 收藏起来 int _LastError怎么样
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