VB6 API聲明中的「用戶定義類型未定義」編譯錯誤

Question

嘗試編譯以下API聲明時，爲什麼會出現「用戶定義類型未定義」錯誤？

Public Declare Function RegQueryInfoKey Lib "advapi32.dll" Alias _ 
    "RegQueryInfoKeyA" (ByVal hKey As Long, ByVal lpClass As String, _ 
    ByRef lpcbClass As Long, ByRef lpReserved As Long, ByRef lpcSubKeys As Long, _ 
    ByRef lpcbMaxSubKeyLen As Long, ByRef lpcbMaxClassLen As Long, _ 
    ByRef lpcValues As Long, ByRef lpcbMaxValueNameLen As Long, _ 
    ByRef lpcbMaxValueLen As Long, ByRef lpcbSecurityDescriptor As Long, _ 
    ByRef lpftLastWriteTime As FILETIME) As Long 

Answer 1

看起來好像您還沒有聲明FILETIME UDT。

在VB6中，它的聲明如下：

Type FILETIME 
    dwLowDateTime As Long 
    dwHighDateTime As Long 
End Type