w7 ->VB6 错误“未定义用户定义的类型"

我在尝试编译 VB6 程序时收到错误未定义用户定义的类型".编译器突出显示了语句Public fMainForm As frmMain".这个程序以前编译没有错误.

I receive error "User-defined type not defined" when trying to compile a VB6 programme.The statement "Public fMainForm As frmMain" is highlighted by the compiler. This programme has previously compiled without error.

我的代码是

Public fMainForm As frmMain
Public commonSQl, commonDSN, commonPealNo, commonDove, _
commonGridRefE, commonGridRefN As String
Public commonDate As Date
Public commonShowUnringable As Boolean
Public IsOpen As Integer



Sub Main()
    Dim fLogin As New frmLogin
    commonDSN = ""
    fLogin.Show vbModal
    Isloaded = -1
    If Not fLogin.OK Then
    'Login Failed so exit app
    End
    End If
    Unload fLogin


    frmSplash.Show
    frmSplash.Refresh
    Set fMainForm = New frmMain
    Load fMainForm
    Unload frmSplash


    fMainForm.Show
End Sub