Source: https://fxcodebase.com/code/viewtopic.php?f=38&t=21111
Forum: 38 · Topic 21111 · 1 post(s)
Alexander.Gettinger · Tue Jul 17, 2012 5:22 pm
Sometimes the indicator or expert advisor needs to save some of the values for later use. Using global variables can only store a numeric value. This library allows you to save any value as a string.
Before using the library must be placed in the directory /experts/include of MT4.
To connect the library, use the command “#include
void openDB(string _DBname) Opens the database named _DBname. As the name may be used the name of the indicator or whatever.
void put(string name, string value) Save the value with [name].
string get(string name, string default_value) Return a value [name]. If no value is found in the database will be returned default value.
void closeDB() Close the database and save all changes. Until the function is called, all changes in the database are not saved.
Example of use:
#include <Storage.mqh>
int start()
{
openDB("Test");
put("val2","1000");
Print(get("val2",1));
Print(get("val1",1));
closeDB();
return(0);
}
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