一个自定义函数，可提取中文字串中每个字符的拼音首字母，忽略字串中的英文字母和标点，阿拉伯数字，空格等。
附件中有使用范例。
已发现的缺点：不能识别多音字，比如 “单”有"shan、dan"两种读音，其只能识别一种；
到底能识别多少中文字，我也不清楚。
Dim L As Integer, i As Integer
Dim GetPY As String, N As String
On Error Resume Next
myStr = StrConv(myStr, vbNarrow)
L = Len(myStr)
For i = 1 To L
If Asc(Mid(myStr, i, 1)) > 0 Or Err.Number = 1004 Then N = ""
N = Application.WorksheetFunction.VLookup(Mid(myStr, i, 1), _
[{"吖","A";"八","B";"嚓","C";"咑","D";"鵽","E";"发","F";"猤","G";"铪","H";"夻","J";"咔","K";"垃","L";"嘸","M";"旀","N";"噢","O";"妑","P";"七","Q";"囕","R";"仨","S";"他","T";"屲","W";"夕","X";"丫","Y";"帀","Z"}], 2)
GetPY = GetPY & N
Next i
HYPY = GetPY
End Function