使用 RegEx 提取字符串部分

 placeholderCopymyDebt := 9000
index  := RegExMatch("You owe me $42", "\$(\d+)", dollars)
if(index > 0) { ; indices are usually 1-based in AHK
    myDebt += dollars1
    MsgBox, Current debt: %myDebt%
}

结果：

目前的债务：9042