Question

vb中引入初始定义模块后一直说是编译错误：用户定义类型未定义

visual basic 6.0中，将采集卡的动态链接库dll放入路径中，并把定义模块bas添加到工程中，但是在编译时
Public Declare Function SetDataReadyCallback Lib "hs4.dll" (ByVal pAddress As Long) As Integer
Public Declare Function SetDataReadyEvent Lib "hs4.dll" (ByVal hEvent As THandle) As Integer
Public Declare Function SetTransferMode Lib "hs4.dll" (ByVal dwMode As Long) As Integer
Public Declare Function GetTransferMode Lib "hs4.dll" (ByRef dwMode As Long) As Integer
这些都出现编译错误：用户定义类型未定义，不知道是什么引用或者部件未定义。求大侠支招
窗体对象如图

Answer 1

错误的黄色行出现在哪一行
Public Declare Function SetDataReadyEvent Lib "hs4.dll" (ByVal hEvent As THandle) As Integer 中的 THandle 不是VB自带的数据类型 注意检查是否有

Answer 2

把“Declare”去掉

追问

去掉后直接变红，出错啊
添加了三个部件后：

Microsoft chart control 6.0
Microsoft comm cotrol 6.0
Microsoft Hierarchical Flexgrid control 6.0 后
第一句能编译了

但是后面语句还是继续出现编译错误

追答

把Public去掉，不是Declare