目录
索引 🔎︎

# InStr 函数

返回某个字符串在另一字符串中的位置。

Instr 函数返回两个字符串相匹配的位置。如果在另一个字符串中未找到给定的字符串，则返回 0。

### 语法:

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

### 返回值:

Integer

### 参数:

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 that you want to search.

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

Compare: Optional numeric expression that defines the type of comparison. The value of this parameter can be 0 or 1. The default value of 1 specifies a text comparison that is not case-sensitive. The value of 0 specifies a binary comparison that is case-sensitive.

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

### 错误代码:

5 无效的过程调用

## 示例:

    Sub ExamplePosition
    Dim sInput As String
    Dim iPos As Integer
        sInput = "Office"
        iPos = Instr(sInput,"c")
        Print iPos
    End Sub