InStr Function

Trả về vị trí của một chuỗi bên trong chuỗi khác.

Hàm InStr trả về vị trí ở đó đã tìm mục tương ứng. Không tìm thấy thì hàm trả về 0.

Syntax:


InStr ([Start As Long,] String1 As String, String2 As String[, Compare As Integer]) As Integer

Return value:

Integer

Parameters:

Start: A numeric expression that marks the position in a string where the search for the specified substring starts. If you omit this parameter, the search starts at the first character of the string. The minimum allowed value is 1. The maximum allowed value is 2,147,483,648.

String1: The string expression being searched.

String2: The string expression that you want to search for.

Compare: Optional type of comparison. The value can be 0 or 1. The default value of 1 specifies case-insensitive. The value of 0 specifies case-sensitive.

note

Case-insensitive comparison may use locale specifics, for example, "s" may match "β".


To avoid a run-time error, do not set the Compare parameter if the Start parameter is omitted.

Error codes:

5 Sai gọi thủ tục

Thí dụ :


Sub ExamplePosition
  Const sCalc = "LibreOffice Calc"

  Instr(sCalc, "calc")     ' returns 13
  Instr(String1:=sCalc, String2:="calc", Start:=1)  ' returns 13
  Instr(11, sCalc, "c")     ' returns 13
  Instr(11, sCalc, "c",  1) ' returns 13
  Instr(11, sCalc, "c",  0) ' returns 16
End Sub

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