StringFind - MQL4 Documentation

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int StringFind(

string text, string matched_text, int start=0)

Search for a substring. Returns the position in the string from which the searched substring begins, or -1 if the substring has not been found.

Parameters:

text	-	String to search in.
matched_text	-	Substring to search for.
start	-	Position in the string to start search from.

Sample:

  string text="The quick brown dog jumps over the lazy fox";
  int index=StringFind(text, "dog jumps over", 0);
  if(index!=16)
    Print("oops!");