VB如果删除ini中某一段Section？该如何处理

VB如果删除ini中某一段Section？
比如：123.ini
[w1]
a=123
b=456
[w2]
c=789
想删除a=123

劳驾给个完整点代码，

[解决办法]
Private Declare Function WritePrivateProfileString Lib "kernel32 " Alias "WritePrivateProfileStringA " (ByVal lpApplicationName As String, ByVal lpKeyName As Any, ByVal lpString As Any, ByVal lpFileName As String) As Long


Call WritePrivateProfileString( "w1 ", "a ", 0&, "123.ini ")