RAD Studio VCL Reference
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TWideStrings.IndexOf Method

Returns the position of a string in the list.

Pascal
function IndexOf(const S: WideString): Integer; virtual;
C++
virtual __fastcall int IndexOf(const BSTR S);

Call IndexOf to obtain the position of the first occurrence of the string S, or of a string that differs from S only by case. IndexOf returns the 0-based index of the string. Thus, if S matches the first string in the list, IndexOf returns 0, if S is the second string, IndexOf returns 1, and so on. If the string is not in the string list, IndexOf returns -1.

Note: If the string appears in the list more than once, IndexOf returns the position of the first occurrence.
 

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