分享程序员开发的那些事...
更新时间：2023-11-26 17:37:34
adVarchar ， adCmdText 和 adParamInput 是常量值，需要在可以使用之前定义.您可以通过多种方式进行此操作:
adVarchar, adCmdText and adParamInput are constant values that need to be defined before they can be used. There are a number of ways you can do this:
仅定义您手动需要的常量:
Define just the constants you require manually:
const adVarChar = 200
const adParamInput = &H0001
const adCmdText = &H0001
直接使用这些值(可读性/维护性较低，通常不建议这样做):
Use the values directly (this is less readable / maintable and generally not recommended):
cmd.Parameters.Append cmd.CreateParameter("@name", 200, &H0001, 50, "%" & this.Form("email") & "%")
包括一个 adovbs.inc ，该代码定义了一个方便的包含文件中的所有ADO常量:
Include a adovbs.inc which defines all of the ADO constants in a handy include file:
<!--#include virtual="/adovbs.inc"-->
adovbs.inc文件本身可以在网络上的许多地方下载(请确保对其进行快速扫描以检查其中是否包含讨厌的东西)，
The adovbs.inc file itself is available for download in lots of places on the web (make sure you give it a quick scan to check it doesn't include anything nasty), the 4GuysFromRolla site being a popular one (download the .txt linked and rename it to .inc)
包括引用ADO TypeLib :
<!--metadata type="TypeLib" name="Microsoft ActiveX Data Objects 2.8 Library" uuid="{2A75196C-D9EB-4129-B803-931327F72D5C}" version="2.8"-->